78 files changed, 12526 insertions, 3147 deletions

diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 9c23122f755f..82bb3b2d207a 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -1811,6 +1811,12 @@ config ZFCP
           called zfcp. If you want to compile it as a module, say M here
           and read <file:Documentation/kbuild/modules.txt>.
 
+config SCSI_PMCRAID
+        tristate "PMC SIERRA Linux MaxRAID adapter support"
+        depends on PCI && SCSI
+        ---help---
+          This driver supports the PMC SIERRA MaxRAID adapters.
+
 config SCSI_SRP
         tristate "SCSI RDMA Protocol helper library"
         depends on SCSI && PCI
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 25429ea63d0a..61a94af3cee7 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -130,6 +130,7 @@ obj-$(CONFIG_SCSI_MVSAS)	+= mvsas/
 obj-$(CONFIG_PS3_ROM)           += ps3rom.o
 obj-$(CONFIG_SCSI_CXGB3_ISCSI)  += libiscsi.o libiscsi_tcp.o cxgb3i/
 obj-$(CONFIG_SCSI_BNX2_ISCSI)   += libiscsi.o bnx2i/
+obj-$(CONFIG_SCSI_PMCRAID)      += pmcraid.o
 
 obj-$(CONFIG_ARM)               += arm/
 
diff --git a/drivers/scsi/bnx2i/bnx2i_init.c b/drivers/scsi/bnx2i/bnx2i_init.c
index ae4b2d588fd3..0c4210d48ee8 100644
--- a/drivers/scsi/bnx2i/bnx2i_init.c
+++ b/drivers/scsi/bnx2i/bnx2i_init.c
@@ -15,11 +15,10 @@
 
 static struct list_head adapter_list = LIST_HEAD_INIT(adapter_list);
 static u32 adapter_count;
-static int bnx2i_reg_device;
 
 #define DRV_MODULE_NAME         "bnx2i"
-#define DRV_MODULE_VERSION      "2.0.1d"
-#define DRV_MODULE_RELDATE      "Mar 25, 2009"
+#define DRV_MODULE_VERSION      "2.0.1e"
+#define DRV_MODULE_RELDATE      "June 22, 2009"
 
 static char version[] __devinitdata =
                 "Broadcom NetXtreme II iSCSI Driver " DRV_MODULE_NAME \
@@ -31,7 +30,7 @@ MODULE_DESCRIPTION("Broadcom NetXtreme II BCM5706/5708/5709 iSCSI Driver");
 MODULE_LICENSE("GPL");
 MODULE_VERSION(DRV_MODULE_VERSION);
 
-static DEFINE_RWLOCK(bnx2i_dev_lock);
+static DEFINE_MUTEX(bnx2i_dev_lock);
 
 unsigned int event_coal_div = 1;
 module_param(event_coal_div, int, 0664);
@@ -100,14 +99,14 @@ struct bnx2i_hba *get_adapter_list_head(void)
         if (!adapter_count)
                 goto hba_not_found;
 
-        read_lock(&bnx2i_dev_lock);
+        mutex_lock(&bnx2i_dev_lock);
         list_for_each_entry(tmp_hba, &adapter_list, link) {
                 if (tmp_hba->cnic && tmp_hba->cnic->cm_select_dev) {
                         hba = tmp_hba;
                         break;
                 }
         }
-        read_unlock(&bnx2i_dev_lock);
+        mutex_unlock(&bnx2i_dev_lock);
 hba_not_found:
         return hba;
 }
@@ -122,14 +121,14 @@ struct bnx2i_hba *bnx2i_find_hba_for_cnic(struct cnic_dev *cnic)
 {
         struct bnx2i_hba *hba, *temp;
 
-        read_lock(&bnx2i_dev_lock);
+        mutex_lock(&bnx2i_dev_lock);
         list_for_each_entry_safe(hba, temp, &adapter_list, link) {
                 if (hba->cnic == cnic) {
-                        read_unlock(&bnx2i_dev_lock);
+                        mutex_unlock(&bnx2i_dev_lock);
                         return hba;
                 }
         }
-        read_unlock(&bnx2i_dev_lock);
+        mutex_unlock(&bnx2i_dev_lock);
         return NULL;
 }
 
@@ -186,18 +185,17 @@ void bnx2i_stop(void *handle)
  */
 void bnx2i_register_device(struct bnx2i_hba *hba)
 {
+        int rc;
+
         if (test_bit(ADAPTER_STATE_GOING_DOWN, &hba->adapter_state) ||
             test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
                 return;
         }
 
-        hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
+        rc = hba->cnic->register_device(hba->cnic, CNIC_ULP_ISCSI, hba);
 
-        spin_lock(&hba->lock);
-        bnx2i_reg_device++;
-        spin_unlock(&hba->lock);
-
-        set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
+        if (!rc)
+                set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
 }
 
 
@@ -211,10 +209,10 @@ void bnx2i_reg_dev_all(void)
 {
         struct bnx2i_hba *hba, *temp;
 
-        read_lock(&bnx2i_dev_lock);
+        mutex_lock(&bnx2i_dev_lock);
         list_for_each_entry_safe(hba, temp, &adapter_list, link)
                 bnx2i_register_device(hba);
-        read_unlock(&bnx2i_dev_lock);
+        mutex_unlock(&bnx2i_dev_lock);
 }
 
 
@@ -234,10 +232,6 @@ static void bnx2i_unreg_one_device(struct bnx2i_hba *hba)
 
         hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
 
-        spin_lock(&hba->lock);
-        bnx2i_reg_device--;
-        spin_unlock(&hba->lock);
-
         /* ep_disconnect could come before NETDEV_DOWN, driver won't
          * see NETDEV_DOWN as it already unregistered itself.
          */
@@ -255,10 +249,10 @@ void bnx2i_unreg_dev_all(void)
 {
         struct bnx2i_hba *hba, *temp;
 
-        read_lock(&bnx2i_dev_lock);
+        mutex_lock(&bnx2i_dev_lock);
         list_for_each_entry_safe(hba, temp, &adapter_list, link)
                 bnx2i_unreg_one_device(hba);
-        read_unlock(&bnx2i_dev_lock);
+        mutex_unlock(&bnx2i_dev_lock);
 }
 
 
@@ -267,35 +261,34 @@ void bnx2i_unreg_dev_all(void)
  * @hba:        bnx2i adapter instance
  * @cnic:       cnic device handle
  *
- * Global resource lock and host adapter lock is held during critical sections
- *      below. This routine is called from cnic_register_driver() context and
- *      work horse thread which does majority of device specific initialization
+ * Global resource lock is held during critical sections below. This routine is
+ *      called from either cnic_register_driver() or device hot plug context and
+ *      and does majority of device specific initialization
  */
 static int bnx2i_init_one(struct bnx2i_hba *hba, struct cnic_dev *cnic)
 {
         int rc;
 
-        read_lock(&bnx2i_dev_lock);
-        if (bnx2i_reg_device &&
-            !test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
-                rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
-                if (rc)         /* duplicate registration */
-                        printk(KERN_ERR "bnx2i- dev reg failed\n");
-
-                spin_lock(&hba->lock);
-                bnx2i_reg_device++;
+        mutex_lock(&bnx2i_dev_lock);
+        rc = cnic->register_device(cnic, CNIC_ULP_ISCSI, hba);
+        if (!rc) {
                 hba->age++;
-                spin_unlock(&hba->lock);
-
                 set_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
-        }
-        read_unlock(&bnx2i_dev_lock);
-
-        write_lock(&bnx2i_dev_lock);
-        list_add_tail(&hba->link, &adapter_list);
-        adapter_count++;
-        write_unlock(&bnx2i_dev_lock);
-        return 0;
+                list_add_tail(&hba->link, &adapter_list);
+                adapter_count++;
+        } else if (rc == -EBUSY)        /* duplicate registration */
+                printk(KERN_ALERT "bnx2i, duplicate registration"
+                                  "hba=%p, cnic=%p\n", hba, cnic);
+        else if (rc == -EAGAIN)
+                printk(KERN_ERR "bnx2i, driver not registered\n");
+        else if (rc == -EINVAL)
+                printk(KERN_ERR "bnx2i, invalid type %d\n", CNIC_ULP_ISCSI);
+        else
+                printk(KERN_ERR "bnx2i dev reg, unknown error, %d\n", rc);
+
+        mutex_unlock(&bnx2i_dev_lock);
+
+        return rc;
 }
 
 
@@ -343,19 +336,15 @@ void bnx2i_ulp_exit(struct cnic_dev *dev)
                                  "found, dev 0x%p\n", dev);
                 return;
         }
-        write_lock(&bnx2i_dev_lock);
+        mutex_lock(&bnx2i_dev_lock);
         list_del_init(&hba->link);
         adapter_count--;
 
         if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
                 hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
                 clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
-
-                spin_lock(&hba->lock);
-                bnx2i_reg_device--;
-                spin_unlock(&hba->lock);
         }
-        write_unlock(&bnx2i_dev_lock);
+        mutex_unlock(&bnx2i_dev_lock);
 
         bnx2i_free_hba(hba);
 }
@@ -377,6 +366,8 @@ static int __init bnx2i_mod_init(void)
         if (!is_power_of_2(sq_size))
                 sq_size = roundup_pow_of_two(sq_size);
 
+        mutex_init(&bnx2i_dev_lock);
+
         bnx2i_scsi_xport_template =
                         iscsi_register_transport(&bnx2i_iscsi_transport);
         if (!bnx2i_scsi_xport_template) {
@@ -412,7 +403,7 @@ static void __exit bnx2i_mod_exit(void)
 {
         struct bnx2i_hba *hba;
 
-        write_lock(&bnx2i_dev_lock);
+        mutex_lock(&bnx2i_dev_lock);
         while (!list_empty(&adapter_list)) {
                 hba = list_entry(adapter_list.next, struct bnx2i_hba, link);
                 list_del(&hba->link);
@@ -421,14 +412,11 @@ static void __exit bnx2i_mod_exit(void)
                 if (test_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic)) {
                         hba->cnic->unregister_device(hba->cnic, CNIC_ULP_ISCSI);
                         clear_bit(BNX2I_CNIC_REGISTERED, &hba->reg_with_cnic);
-                        bnx2i_reg_device--;
                 }
 
-                write_unlock(&bnx2i_dev_lock);
                 bnx2i_free_hba(hba);
-                write_lock(&bnx2i_dev_lock);
         }
-        write_unlock(&bnx2i_dev_lock);
+        mutex_unlock(&bnx2i_dev_lock);
 
         iscsi_unregister_transport(&bnx2i_iscsi_transport);
         cnic_unregister_driver(CNIC_ULP_ISCSI);
diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index f7412196f2f8..9a7ba71f1af4 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -387,6 +387,7 @@ static struct iscsi_endpoint *bnx2i_alloc_ep(struct bnx2i_hba *hba)
         bnx2i_ep = ep->dd_data;
         INIT_LIST_HEAD(&bnx2i_ep->link);
         bnx2i_ep->state = EP_STATE_IDLE;
+        bnx2i_ep->ep_iscsi_cid = (u16) -1;
         bnx2i_ep->hba = hba;
         bnx2i_ep->hba_age = hba->age;
         hba->ofld_conns_active++;
@@ -1160,9 +1161,6 @@ static int bnx2i_task_xmit(struct iscsi_task *task)
         struct bnx2i_cmd *cmd = task->dd_data;
         struct iscsi_cmd *hdr = (struct iscsi_cmd *) task->hdr;
 
-        if (test_bit(ADAPTER_STATE_LINK_DOWN, &hba->adapter_state))
-                return -ENOTCONN;
-
         if (!bnx2i_conn->is_bound)
                 return -ENOTCONN;
 
@@ -1653,15 +1651,18 @@ static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
         struct iscsi_endpoint *ep;
         int rc = 0;
 
-        if (shost)
+        if (shost) {
                 /* driver is given scsi host to work with */
                 hba = iscsi_host_priv(shost);
-        else
+                /* Register the device with cnic if not already done so */
+                bnx2i_register_device(hba);
+        } else
                 /*
                  * check if the given destination can be reached through
                  * a iscsi capable NetXtreme2 device
                  */
                 hba = bnx2i_check_route(dst_addr);
+
         if (!hba) {
                 rc = -ENOMEM;
                 goto check_busy;
@@ -1681,8 +1682,6 @@ static struct iscsi_endpoint *bnx2i_ep_connect(struct Scsi_Host *shost,
                 goto net_if_down;
         }
 
-        bnx2i_ep->state = EP_STATE_IDLE;
-        bnx2i_ep->ep_iscsi_cid = (u16) -1;
         bnx2i_ep->num_active_cmds = 0;
         iscsi_cid = bnx2i_alloc_iscsi_cid(hba);
         if (iscsi_cid == -1) {
diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index 7b1633a8c15a..fe11c1d4b31d 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -353,6 +353,12 @@ ch_readconfig(scsi_changer *ch)
         /* look up the devices of the data transfer elements */
         ch->dt = kmalloc(ch->counts[CHET_DT]*sizeof(struct scsi_device),
                          GFP_KERNEL);
+
+        if (!ch->dt) {
+                kfree(buffer);
+                return -ENOMEM;
+        }
+
         for (elem = 0; elem < ch->counts[CHET_DT]; elem++) {
                 id  = -1;
                 lun = 0;
diff --git a/drivers/scsi/constants.c b/drivers/scsi/constants.c
index e79e18101f87..63abb06c4edb 100644
--- a/drivers/scsi/constants.c
+++ b/drivers/scsi/constants.c
@@ -4,8 +4,7 @@
  * Additions for SCSI 2 and Linux 2.2.x by D. Gilbert (990422)
  * Additions for SCSI 3+ (SPC-3 T10/1416-D Rev 07 3 May 2002)
  *   by D. Gilbert and aeb (20020609)
- * Additions for SPC-3 T10/1416-D Rev 21 22 Sept 2004, D. Gilbert 20041025
- * Update to SPC-4 T10/1713-D Rev 5a, 14 June 2006, D. Gilbert 20060702
+ * Update to SPC-4 T10/1713-D Rev 20, 22 May 2009, D. Gilbert 20090624
  */
 
 #include <linux/blkdev.h>
@@ -56,9 +55,9 @@ static const char * cdb_byte0_names[] = {
             "Read Buffer", 
 /* 3d-3f */ "Update Block", "Read Long(10)",  "Write Long(10)",
 /* 40-41 */ "Change Definition", "Write Same(10)",
-/* 42-48 */ "Read sub-channel", "Read TOC/PMA/ATIP", "Read density support",
-            "Play audio(10)", "Get configuration", "Play audio msf",
-            "Play audio track/index",
+/* 42-48 */ "Unmap/Read sub-channel", "Read TOC/PMA/ATIP",
+            "Read density support", "Play audio(10)", "Get configuration",
+            "Play audio msf", "Play audio track/index",
 /* 49-4f */ "Play track relative(10)", "Get event status notification",
             "Pause/resume", "Log Select", "Log Sense", "Stop play/scan",
             NULL,
@@ -71,12 +70,13 @@ static const char * cdb_byte0_names[] = {
 /* 60-67 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 /* 68-6f */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
 /* 70-77 */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
-/* 78-7f */ NULL, NULL, NULL, NULL, NULL, NULL, NULL, "Variable length",
+/* 78-7f */ NULL, NULL, NULL, NULL, NULL, NULL, "Extended CDB",
+            "Variable length",
 /* 80-84 */ "Xdwrite(16)", "Rebuild(16)", "Regenerate(16)", "Extended copy",
             "Receive copy results",
 /* 85-89 */ "ATA command pass through(16)", "Access control in",
             "Access control out", "Read(16)", "Memory Export Out(16)",
-/* 8a-8f */ "Write(16)", NULL, "Read attributes", "Write attributes",
+/* 8a-8f */ "Write(16)", "ORWrite", "Read attributes", "Write attributes",
             "Write and verify(16)", "Verify(16)",
 /* 90-94 */ "Pre-fetch(16)", "Synchronize cache(16)",
             "Lock/unlock cache(16)", "Write same(16)", NULL,
@@ -107,22 +107,24 @@ struct value_name_pair {
 };
 
 static const struct value_name_pair maint_in_arr[] = {
-        {0x5, "Report device identifier"},
+        {0x5, "Report identifying information"},
         {0xa, "Report target port groups"},
         {0xb, "Report aliases"},
         {0xc, "Report supported operation codes"},
         {0xd, "Report supported task management functions"},
         {0xe, "Report priority"},
         {0xf, "Report timestamp"},
+        {0x10, "Management protocol in"},
 };
 #define MAINT_IN_SZ ARRAY_SIZE(maint_in_arr)
 
 static const struct value_name_pair maint_out_arr[] = {
-        {0x6, "Set device identifier"},
+        {0x6, "Set identifying information"},
         {0xa, "Set target port groups"},
         {0xb, "Change aliases"},
         {0xe, "Set priority"},
-        {0xe, "Set timestamp"},
+        {0xf, "Set timestamp"},
+        {0x10, "Management protocol out"},
 };
 #define MAINT_OUT_SZ ARRAY_SIZE(maint_out_arr)
 
@@ -412,6 +414,7 @@ static const struct error_info additional[] =
         {0x0004, "Beginning-of-partition/medium detected"},
         {0x0005, "End-of-data detected"},
         {0x0006, "I/O process terminated"},
+        {0x0007, "Programmable early warning detected"},
         {0x0011, "Audio play operation in progress"},
         {0x0012, "Audio play operation paused"},
         {0x0013, "Audio play operation successfully completed"},
@@ -425,6 +428,7 @@ static const struct error_info additional[] =
         {0x001B, "Set capacity operation in progress"},
         {0x001C, "Verify operation in progress"},
         {0x001D, "ATA pass through information available"},
+        {0x001E, "Conflicting SA creation request"},
 
         {0x0100, "No index/sector signal"},
 
@@ -449,9 +453,12 @@ static const struct error_info additional[] =
         {0x040B, "Logical unit not accessible, target port in standby state"},
         {0x040C, "Logical unit not accessible, target port in unavailable "
          "state"},
+        {0x040D, "Logical unit not ready, structure check required"},
         {0x0410, "Logical unit not ready, auxiliary memory not accessible"},
         {0x0411, "Logical unit not ready, notify (enable spinup) required"},
         {0x0412, "Logical unit not ready, offline"},
+        {0x0413, "Logical unit not ready, SA creation in progress"},
+        {0x0414, "Logical unit not ready, space allocation in progress"},
 
         {0x0500, "Logical unit does not respond to selection"},
 
@@ -479,6 +486,9 @@ static const struct error_info additional[] =
         {0x0B03, "Warning - background self-test failed"},
         {0x0B04, "Warning - background pre-scan detected medium error"},
         {0x0B05, "Warning - background medium scan detected medium error"},
+        {0x0B06, "Warning - non-volatile cache now volatile"},
+        {0x0B07, "Warning - degraded power to non-volatile cache"},
+        {0x0B08, "Warning - power loss expected"},
 
         {0x0C00, "Write error"},
         {0x0C01, "Write error - recovered with auto reallocation"},
@@ -593,6 +603,7 @@ static const struct error_info additional[] =
         {0x1C02, "Grown defect list not found"},
 
         {0x1D00, "Miscompare during verify operation"},
+        {0x1D01, "Miscompare verify of unmapped LBA"},
 
         {0x1E00, "Recovered id with ECC correction"},
 
@@ -626,6 +637,7 @@ static const struct error_info additional[] =
         {0x2405, "Security working key frozen"},
         {0x2406, "Nonce not unique"},
         {0x2407, "Nonce timestamp out of range"},
+        {0x2408, "Invalid XCDB"},
 
         {0x2500, "Logical unit not supported"},
 
@@ -656,10 +668,12 @@ static const struct error_info additional[] =
         {0x2704, "Persistent write protect"},
         {0x2705, "Permanent write protect"},
         {0x2706, "Conditional write protect"},
+        {0x2707, "Space allocation failed write protect"},
 
         {0x2800, "Not ready to ready change, medium may have changed"},
         {0x2801, "Import or export element accessed"},
         {0x2802, "Format-layer may have changed"},
+        {0x2803, "Import/export element accessed, medium changed"},
 
         {0x2900, "Power on, reset, or bus device reset occurred"},
         {0x2901, "Power on occurred"},
@@ -680,11 +694,16 @@ static const struct error_info additional[] =
         {0x2A07, "Implicit asymmetric access state transition failed"},
         {0x2A08, "Priority changed"},
         {0x2A09, "Capacity data has changed"},
+        {0x2A0A, "Error history I_T nexus cleared"},
+        {0x2A0B, "Error history snapshot released"},
+        {0x2A0C, "Error recovery attributes have changed"},
+        {0x2A0D, "Data encryption capabilities changed"},
         {0x2A10, "Timestamp changed"},
         {0x2A11, "Data encryption parameters changed by another i_t nexus"},
         {0x2A12, "Data encryption parameters changed by vendor specific "
                  "event"},
         {0x2A13, "Data encryption key instance counter has changed"},
+        {0x2A14, "SA creation capabilities data has changed"},
 
         {0x2B00, "Copy cannot execute since host cannot disconnect"},
 
@@ -723,6 +742,8 @@ static const struct error_info additional[] =
         {0x300C, "WORM medium - overwrite attempted"},
         {0x300D, "WORM medium - integrity check"},
         {0x3010, "Medium not formatted"},
+        {0x3011, "Incompatible volume type"},
+        {0x3012, "Incompatible volume qualifier"},
 
         {0x3100, "Medium format corrupted"},
         {0x3101, "Format command failed"},
@@ -782,6 +803,10 @@ static const struct error_info additional[] =
         {0x3B15, "Medium magazine unlocked"},
         {0x3B16, "Mechanical positioning or changer error"},
         {0x3B17, "Read past end of user object"},
+        {0x3B18, "Element disabled"},
+        {0x3B19, "Element enabled"},
+        {0x3B1A, "Data transfer device removed"},
+        {0x3B1B, "Data transfer device inserted"},
 
         {0x3D00, "Invalid bits in identify message"},
 
@@ -882,6 +907,8 @@ static const struct error_info additional[] =
         {0x5506, "Auxiliary memory out of space"},
         {0x5507, "Quota error"},
         {0x5508, "Maximum number of supplemental decryption keys exceeded"},
+        {0x5509, "Medium auxiliary memory not accessible"},
+        {0x550A, "Data currently unavailable"},
 
         {0x5700, "Unable to recover table-of-contents"},
 
@@ -993,6 +1020,12 @@ static const struct error_info additional[] =
         {0x5E02, "Standby condition activated by timer"},
         {0x5E03, "Idle condition activated by command"},
         {0x5E04, "Standby condition activated by command"},
+        {0x5E05, "Idle_b condition activated by timer"},
+        {0x5E06, "Idle_b condition activated by command"},
+        {0x5E07, "Idle_c condition activated by timer"},
+        {0x5E08, "Idle_c condition activated by command"},
+        {0x5E09, "Standby_y condition activated by timer"},
+        {0x5E0A, "Standby_y condition activated by command"},
         {0x5E41, "Power state change to active"},
         {0x5E42, "Power state change to idle"},
         {0x5E43, "Power state change to standby"},
@@ -1091,7 +1124,28 @@ static const struct error_info additional[] =
         {0x7403, "Incorrect data encryption key"},
         {0x7404, "Cryptographic integrity validation failed"},
         {0x7405, "Error decrypting data"},
+        {0x7406, "Unknown signature verification key"},
+        {0x7407, "Encryption parameters not useable"},
+        {0x7408, "Digital signature validation failure"},
+        {0x7409, "Encryption mode mismatch on read"},
+        {0x740A, "Encrypted block not raw read enabled"},
+        {0x740B, "Incorrect Encryption parameters"},
+        {0x740C, "Unable to decrypt parameter list"},
+        {0x740D, "Encryption algorithm disabled"},
+        {0x7410, "SA creation parameter value invalid"},
+        {0x7411, "SA creation parameter value rejected"},
+        {0x7412, "Invalid SA usage"},
+        {0x7421, "Data Encryption configuration prevented"},
+        {0x7430, "SA creation parameter not supported"},
+        {0x7440, "Authentication failed"},
+        {0x7461, "External data encryption key manager access error"},
+        {0x7462, "External data encryption key manager error"},
+        {0x7463, "External data encryption key not found"},
+        {0x7464, "External data encryption request not authorized"},
+        {0x746E, "External data encryption control timeout"},
+        {0x746F, "External data encryption control error"},
         {0x7471, "Logical unit access not authorized"},
+        {0x7479, "Security conflict in translated device"},
 
         {0, NULL}
 };
@@ -1103,12 +1157,12 @@ struct error_info2 {
 
 static const struct error_info2 additional2[] =
 {
-        {0x40,0x00,0x7f,"Ram failure (%x)"},
-        {0x40,0x80,0xff,"Diagnostic failure on component (%x)"},
-        {0x41,0x00,0xff,"Data path failure (%x)"},
-        {0x42,0x00,0xff,"Power-on or self-test failure (%x)"},
-        {0x4D,0x00,0xff,"Tagged overlapped commands (queue tag %x)"},
-        {0x70,0x00,0xff,"Decompression exception short algorithm id of %x"},
+        {0x40, 0x00, 0x7f, "Ram failure (%x)"},
+        {0x40, 0x80, 0xff, "Diagnostic failure on component (%x)"},
+        {0x41, 0x00, 0xff, "Data path failure (%x)"},
+        {0x42, 0x00, 0xff, "Power-on or self-test failure (%x)"},
+        {0x4D, 0x00, 0xff, "Tagged overlapped commands (task tag %x)"},
+        {0x70, 0x00, 0xff, "Decompression exception short algorithm id of %x"},
         {0, 0, 0, NULL}
 };
 
@@ -1157,14 +1211,15 @@ scsi_extd_sense_format(unsigned char asc, unsigned char ascq) {
         int i;
         unsigned short code = ((asc << 8) | ascq);
 
-        for (i=0; additional[i].text; i++)
+        for (i = 0; additional[i].text; i++)
                 if (additional[i].code12 == code)
                         return additional[i].text;
-        for (i=0; additional2[i].fmt; i++)
+        for (i = 0; additional2[i].fmt; i++) {
                 if (additional2[i].code1 == asc &&
-                    additional2[i].code2_min >= ascq &&
-                    additional2[i].code2_max <= ascq)
+                    ascq >= additional2[i].code2_min &&
+                    ascq <= additional2[i].code2_max)
                         return additional2[i].fmt;
+        }
 #endif
         return NULL;
 }
diff --git a/drivers/scsi/cxgb3i/cxgb3i_init.c b/drivers/scsi/cxgb3i/cxgb3i_init.c
index 042d9bce9914..d0ab23a58355 100644
--- a/drivers/scsi/cxgb3i/cxgb3i_init.c
+++ b/drivers/scsi/cxgb3i/cxgb3i_init.c
@@ -26,7 +26,7 @@ MODULE_VERSION(DRV_MODULE_VERSION);
 
 static void open_s3_dev(struct t3cdev *);
 static void close_s3_dev(struct t3cdev *);
-static void s3_err_handler(struct t3cdev *tdev, u32 status, u32 error);
+static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port);
 
 static cxgb3_cpl_handler_func cxgb3i_cpl_handlers[NUM_CPL_CMDS];
 static struct cxgb3_client t3c_client = {
@@ -34,7 +34,7 @@ static struct cxgb3_client t3c_client = {
         .handlers = cxgb3i_cpl_handlers,
         .add = open_s3_dev,
         .remove = close_s3_dev,
-        .err_handler = s3_err_handler,
+        .event_handler = s3_event_handler,
 };
 
 /**
@@ -66,16 +66,16 @@ static void close_s3_dev(struct t3cdev *t3dev)
         cxgb3i_ddp_cleanup(t3dev);
 }
 
-static void s3_err_handler(struct t3cdev *tdev, u32 status, u32 error)
+static void s3_event_handler(struct t3cdev *tdev, u32 event, u32 port)
 {
         struct cxgb3i_adapter *snic = cxgb3i_adapter_find_by_tdev(tdev);
 
-        cxgb3i_log_info("snic 0x%p, tdev 0x%p, status 0x%x, err 0x%x.\n",
-                        snic, tdev, status, error);
+        cxgb3i_log_info("snic 0x%p, tdev 0x%p, event 0x%x, port 0x%x.\n",
+                        snic, tdev, event, port);
         if (!snic)
                 return;
 
-        switch (status) {
+        switch (event) {
         case OFFLOAD_STATUS_DOWN:
                 snic->flags |= CXGB3I_ADAPTER_FLAG_RESET;
                 break;
diff --git a/drivers/scsi/device_handler/scsi_dh.c b/drivers/scsi/device_handler/scsi_dh.c
index a518f2eff19a..3ee1cbc89479 100644
--- a/drivers/scsi/device_handler/scsi_dh.c
+++ b/drivers/scsi/device_handler/scsi_dh.c
@@ -153,12 +153,24 @@ static int scsi_dh_handler_attach(struct scsi_device *sdev,
         if (sdev->scsi_dh_data) {
                 if (sdev->scsi_dh_data->scsi_dh != scsi_dh)
                         err = -EBUSY;
-        } else if (scsi_dh->attach)
+                else
+                        kref_get(&sdev->scsi_dh_data->kref);
+        } else if (scsi_dh->attach) {
                 err = scsi_dh->attach(sdev);
-
+                if (!err) {
+                        kref_init(&sdev->scsi_dh_data->kref);
+                        sdev->scsi_dh_data->sdev = sdev;
+                }
+        }
         return err;
 }
 
+static void __detach_handler (struct kref *kref)
+{
+        struct scsi_dh_data *scsi_dh_data = container_of(kref, struct scsi_dh_data, kref);
+        scsi_dh_data->scsi_dh->detach(scsi_dh_data->sdev);
+}
+
 /*
  * scsi_dh_handler_detach - Detach a device handler from a device
  * @sdev - SCSI device the device handler should be detached from
@@ -180,7 +192,7 @@ static void scsi_dh_handler_detach(struct scsi_device *sdev,
                 scsi_dh = sdev->scsi_dh_data->scsi_dh;
 
         if (scsi_dh && scsi_dh->detach)
-                scsi_dh->detach(sdev);
+                kref_put(&sdev->scsi_dh_data->kref, __detach_handler);
 }
 
 /*
@@ -440,6 +452,39 @@ int scsi_dh_activate(struct request_queue *q)
 EXPORT_SYMBOL_GPL(scsi_dh_activate);
 
 /*
+ * scsi_dh_set_params - set the parameters for the device as per the
+ *      string specified in params.
+ * @q - Request queue that is associated with the scsi_device for
+ *      which the parameters to be set.
+ * @params - parameters in the following format
+ *      "no_of_params\0param1\0param2\0param3\0...\0"
+ *      for example, string for 2 parameters with value 10 and 21
+ *      is specified as "2\010\021\0".
+ */
+int scsi_dh_set_params(struct request_queue *q, const char *params)
+{
+        int err = -SCSI_DH_NOSYS;
+        unsigned long flags;
+        struct scsi_device *sdev;
+        struct scsi_device_handler *scsi_dh = NULL;
+
+        spin_lock_irqsave(q->queue_lock, flags);
+        sdev = q->queuedata;
+        if (sdev && sdev->scsi_dh_data)
+                scsi_dh = sdev->scsi_dh_data->scsi_dh;
+        if (scsi_dh && scsi_dh->set_params && get_device(&sdev->sdev_gendev))
+                err = 0;
+        spin_unlock_irqrestore(q->queue_lock, flags);
+
+        if (err)
+                return err;
+        err = scsi_dh->set_params(sdev, params);
+        put_device(&sdev->sdev_gendev);
+        return err;
+}
+EXPORT_SYMBOL_GPL(scsi_dh_set_params);
+
+/*
  * scsi_dh_handler_exist - Return TRUE(1) if a device handler exists for
  *      the given name. FALSE(0) otherwise.
  * @name - name of the device handler.
@@ -474,7 +519,6 @@ int scsi_dh_attach(struct request_queue *q, const char *name)
 
         if (!err) {
                 err = scsi_dh_handler_attach(sdev, scsi_dh);
-
                 put_device(&sdev->sdev_gendev);
         }
         return err;
@@ -505,10 +549,8 @@ void scsi_dh_detach(struct request_queue *q)
                 return;
 
         if (sdev->scsi_dh_data) {
-                /* if sdev is not on internal list, detach */
                 scsi_dh = sdev->scsi_dh_data->scsi_dh;
-                if (!device_handler_match(scsi_dh, sdev))
-                        scsi_dh_handler_detach(sdev, scsi_dh);
+                scsi_dh_handler_detach(sdev, scsi_dh);
         }
         put_device(&sdev->sdev_gendev);
 }
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c
index dba154c8ff64..b5cdefaf2608 100644
--- a/drivers/scsi/device_handler/scsi_dh_alua.c
+++ b/drivers/scsi/device_handler/scsi_dh_alua.c
@@ -663,7 +663,7 @@ static int alua_activate(struct scsi_device *sdev)
                         goto out;
         }
 
-        if (h->tpgs == TPGS_MODE_EXPLICIT && h->state != TPGS_STATE_OPTIMIZED)
+        if (h->tpgs & TPGS_MODE_EXPLICIT && h->state != TPGS_STATE_OPTIMIZED)
                 err = alua_stpg(sdev, TPGS_STATE_OPTIMIZED, h);
 
 out:
diff --git a/drivers/scsi/device_handler/scsi_dh_emc.c b/drivers/scsi/device_handler/scsi_dh_emc.c
index 0e572d2c5b0a..0cffe84976fe 100644
--- a/drivers/scsi/device_handler/scsi_dh_emc.c
+++ b/drivers/scsi/device_handler/scsi_dh_emc.c
@@ -561,6 +561,61 @@ done:
 
         return result;
 }
+/*
+ * params - parameters in the following format
+ *      "no_of_params\0param1\0param2\0param3\0...\0"
+ *      for example, string for 2 parameters with value 10 and 21
+ *      is specified as "2\010\021\0".
+ */
+static int clariion_set_params(struct scsi_device *sdev, const char *params)
+{
+        struct clariion_dh_data *csdev = get_clariion_data(sdev);
+        unsigned int hr = 0, st = 0, argc;
+        const char *p = params;
+        int result = SCSI_DH_OK;
+
+        if ((sscanf(params, "%u", &argc) != 1) || (argc != 2))
+                return -EINVAL;
+
+        while (*p++)
+                ;
+        if ((sscanf(p, "%u", &st) != 1) || (st > 1))
+                return -EINVAL;
+
+        while (*p++)
+                ;
+        if ((sscanf(p, "%u", &hr) != 1) || (hr > 1))
+                return -EINVAL;
+
+        if (st)
+                csdev->flags |= CLARIION_SHORT_TRESPASS;
+        else
+                csdev->flags &= ~CLARIION_SHORT_TRESPASS;
+
+        if (hr)
+                csdev->flags |= CLARIION_HONOR_RESERVATIONS;
+        else
+                csdev->flags &= ~CLARIION_HONOR_RESERVATIONS;
+
+        /*
+         * If this path is owned, we have to send a trespass command
+         * with the new parameters. If not, simply return. Next trespass
+         * command would use the parameters.
+         */
+        if (csdev->lun_state != CLARIION_LUN_OWNED)
+                goto done;
+
+        csdev->lun_state = CLARIION_LUN_UNINITIALIZED;
+        result = send_trespass_cmd(sdev, csdev);
+        if (result != SCSI_DH_OK)
+                goto done;
+
+        /* Update status */
+        result = clariion_send_inquiry(sdev, csdev);
+
+done:
+        return result;
+}
 
 static const struct scsi_dh_devlist clariion_dev_list[] = {
         {"DGC", "RAID"},
@@ -581,11 +636,9 @@ static struct scsi_device_handler clariion_dh = {
         .check_sense    = clariion_check_sense,
         .activate       = clariion_activate,
         .prep_fn        = clariion_prep_fn,
+        .set_params     = clariion_set_params,
 };
 
-/*
- * TODO: need some interface so we can set trespass values
- */
 static int clariion_bus_attach(struct scsi_device *sdev)
 {
         struct scsi_dh_data *scsi_dh_data;
diff --git a/drivers/scsi/device_handler/scsi_dh_rdac.c b/drivers/scsi/device_handler/scsi_dh_rdac.c
index fd0544f7da81..11c89311427e 100644
--- a/drivers/scsi/device_handler/scsi_dh_rdac.c
+++ b/drivers/scsi/device_handler/scsi_dh_rdac.c
@@ -112,6 +112,7 @@ struct c9_inquiry {
 
 #define SUBSYS_ID_LEN   16
 #define SLOT_ID_LEN     2
+#define ARRAY_LABEL_LEN 31
 
 struct c4_inquiry {
         u8      peripheral_info;
@@ -135,6 +136,8 @@ struct rdac_controller {
                 struct rdac_pg_legacy legacy;
                 struct rdac_pg_expanded expanded;
         } mode_select;
+        u8      index;
+        u8      array_name[ARRAY_LABEL_LEN];
 };
 struct c8_inquiry {
         u8      peripheral_info;
@@ -198,6 +201,31 @@ static const char *lun_state[] =
 static LIST_HEAD(ctlr_list);
 static DEFINE_SPINLOCK(list_lock);
 
+/*
+ * module parameter to enable rdac debug logging.
+ * 2 bits for each type of logging, only two types defined for now
+ * Can be enhanced if required at later point
+ */
+static int rdac_logging = 1;
+module_param(rdac_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(rdac_logging, "A bit mask of rdac logging levels, "
+                "Default is 1 - failover logging enabled, "
+                "set it to 0xF to enable all the logs");
+
+#define RDAC_LOG_FAILOVER       0
+#define RDAC_LOG_SENSE          2
+
+#define RDAC_LOG_BITS           2
+
+#define RDAC_LOG_LEVEL(SHIFT)  \
+        ((rdac_logging >> (SHIFT)) & ((1 << (RDAC_LOG_BITS)) - 1))
+
+#define RDAC_LOG(SHIFT, sdev, f, arg...) \
+do { \
+        if (unlikely(RDAC_LOG_LEVEL(SHIFT))) \
+                sdev_printk(KERN_INFO, sdev, RDAC_NAME ": " f "\n", ## arg); \
+} while (0);
+
 static inline struct rdac_dh_data *get_rdac_data(struct scsi_device *sdev)
 {
         struct scsi_dh_data *scsi_dh_data = sdev->scsi_dh_data;
@@ -303,7 +331,8 @@ static void release_controller(struct kref *kref)
         kfree(ctlr);
 }
 
-static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
+static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id,
+                                                char *array_name)
 {
         struct rdac_controller *ctlr, *tmp;
 
@@ -324,6 +353,14 @@ static struct rdac_controller *get_controller(u8 *subsys_id, u8 *slot_id)
         /* initialize fields of controller */
         memcpy(ctlr->subsys_id, subsys_id, SUBSYS_ID_LEN);
         memcpy(ctlr->slot_id, slot_id, SLOT_ID_LEN);
+        memcpy(ctlr->array_name, array_name, ARRAY_LABEL_LEN);
+
+        /* update the controller index */
+        if (slot_id[1] == 0x31)
+                ctlr->index = 0;
+        else
+                ctlr->index = 1;
+
         kref_init(&ctlr->kref);
         ctlr->use_ms10 = -1;
         list_add(&ctlr->node, &ctlr_list);
@@ -363,9 +400,10 @@ done:
         return err;
 }
 
-static int get_lun(struct scsi_device *sdev, struct rdac_dh_data *h)
+static int get_lun_info(struct scsi_device *sdev, struct rdac_dh_data *h,
+                        char *array_name)
 {
-        int err;
+        int err, i;
         struct c8_inquiry *inqp;
 
         err = submit_inquiry(sdev, 0xC8, sizeof(struct c8_inquiry), h);
@@ -377,6 +415,11 @@ static int get_lun(struct scsi_device *sdev, struct rdac_dh_data *h)
                     inqp->page_id[2] != 'i' || inqp->page_id[3] != 'd')
                         return SCSI_DH_NOSYS;
                 h->lun = inqp->lun[7]; /* Uses only the last byte */
+
+                for(i=0; i<ARRAY_LABEL_LEN-1; ++i)
+                        *(array_name+i) = inqp->array_user_label[(2*i)+1];
+
+                *(array_name+ARRAY_LABEL_LEN-1) = '\0';
         }
         return err;
 }
@@ -410,7 +453,7 @@ static int check_ownership(struct scsi_device *sdev, struct rdac_dh_data *h)
 }
 
 static int initialize_controller(struct scsi_device *sdev,
-                                 struct rdac_dh_data *h)
+                                 struct rdac_dh_data *h, char *array_name)
 {
         int err;
         struct c4_inquiry *inqp;
@@ -418,7 +461,8 @@ static int initialize_controller(struct scsi_device *sdev,
         err = submit_inquiry(sdev, 0xC4, sizeof(struct c4_inquiry), h);
         if (err == SCSI_DH_OK) {
                 inqp = &h->inq.c4;
-                h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id);
+                h->ctlr = get_controller(inqp->subsys_id, inqp->slot_id,
+                                        array_name);
                 if (!h->ctlr)
                         err = SCSI_DH_RES_TEMP_UNAVAIL;
         }
@@ -450,6 +494,7 @@ static int mode_select_handle_sense(struct scsi_device *sdev,
 {
         struct scsi_sense_hdr sense_hdr;
         int err = SCSI_DH_IO, ret;
+        struct rdac_dh_data *h = get_rdac_data(sdev);
 
         ret = scsi_normalize_sense(sensebuf, SCSI_SENSE_BUFFERSIZE, &sense_hdr);
         if (!ret)
@@ -478,11 +523,14 @@ static int mode_select_handle_sense(struct scsi_device *sdev,
                         err = SCSI_DH_RETRY;
                 break;
         default:
-                sdev_printk(KERN_INFO, sdev,
-                            "MODE_SELECT failed with sense %02x/%02x/%02x.\n",
-                            sense_hdr.sense_key, sense_hdr.asc, sense_hdr.ascq);
+                break;
         }
 
+        RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
+                "MODE_SELECT returned with sense %02x/%02x/%02x",
+                (char *) h->ctlr->array_name, h->ctlr->index,
+                sense_hdr.sense_key, sense_hdr.asc, sense_hdr.ascq);
+
 done:
         return err;
 }
@@ -499,7 +547,9 @@ retry:
         if (!rq)
                 goto done;
 
-        sdev_printk(KERN_INFO, sdev, "%s MODE_SELECT command.\n",
+        RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
+                "%s MODE_SELECT command",
+                (char *) h->ctlr->array_name, h->ctlr->index,
                 (retry_cnt == RDAC_RETRY_COUNT) ? "queueing" : "retrying");
 
         err = blk_execute_rq(q, NULL, rq, 1);
@@ -509,8 +559,12 @@ retry:
                 if (err == SCSI_DH_RETRY && retry_cnt--)
                         goto retry;
         }
-        if (err == SCSI_DH_OK)
+        if (err == SCSI_DH_OK) {
                 h->state = RDAC_STATE_ACTIVE;
+                RDAC_LOG(RDAC_LOG_FAILOVER, sdev, "array %s, ctlr %d, "
+                                "MODE_SELECT completed",
+                                (char *) h->ctlr->array_name, h->ctlr->index);
+        }
 
 done:
         return err;
@@ -525,17 +579,6 @@ static int rdac_activate(struct scsi_device *sdev)
         if (err != SCSI_DH_OK)
                 goto done;
 
-        if (!h->ctlr) {
-                err = initialize_controller(sdev, h);
-                if (err != SCSI_DH_OK)
-                        goto done;
-        }
-
-        if (h->ctlr->use_ms10 == -1) {
-                err = set_mode_select(sdev, h);
-                if (err != SCSI_DH_OK)
-                        goto done;
-        }
         if (h->lun_state == RDAC_LUN_UNOWNED)
                 err = send_mode_select(sdev, h);
 done:
@@ -559,6 +602,12 @@ static int rdac_check_sense(struct scsi_device *sdev,
                                 struct scsi_sense_hdr *sense_hdr)
 {
         struct rdac_dh_data *h = get_rdac_data(sdev);
+
+        RDAC_LOG(RDAC_LOG_SENSE, sdev, "array %s, ctlr %d, "
+                        "I/O returned with sense %02x/%02x/%02x",
+                        (char *) h->ctlr->array_name, h->ctlr->index,
+                        sense_hdr->sense_key, sense_hdr->asc, sense_hdr->ascq);
+
         switch (sense_hdr->sense_key) {
         case NOT_READY:
                 if (sense_hdr->asc == 0x04 && sense_hdr->ascq == 0x01)
@@ -628,11 +677,18 @@ static const struct scsi_dh_devlist rdac_dev_list[] = {
         {"SGI", "IS"},
         {"STK", "OPENstorage D280"},
         {"SUN", "CSM200_R"},
+        {"SUN", "LCSM100_I"},
+        {"SUN", "LCSM100_S"},
+        {"SUN", "LCSM100_E"},
         {"SUN", "LCSM100_F"},
         {"DELL", "MD3000"},
         {"DELL", "MD3000i"},
+        {"DELL", "MD32xx"},
+        {"DELL", "MD32xxi"},
         {"LSI", "INF-01-00"},
         {"ENGENIO", "INF-01-00"},
+        {"STK", "FLEXLINE 380"},
+        {"SUN", "CSM100_R_FC"},
         {NULL, NULL},
 };
 
@@ -656,6 +712,7 @@ static int rdac_bus_attach(struct scsi_device *sdev)
         struct rdac_dh_data *h;
         unsigned long flags;
         int err;
+        char array_name[ARRAY_LABEL_LEN];
 
         scsi_dh_data = kzalloc(sizeof(struct scsi_device_handler *)
                                + sizeof(*h) , GFP_KERNEL);
@@ -670,16 +727,24 @@ static int rdac_bus_attach(struct scsi_device *sdev)
         h->lun = UNINITIALIZED_LUN;
         h->state = RDAC_STATE_ACTIVE;
 
-        err = get_lun(sdev, h);
+        err = get_lun_info(sdev, h, array_name);
         if (err != SCSI_DH_OK)
                 goto failed;
 
-        err = check_ownership(sdev, h);
+        err = initialize_controller(sdev, h, array_name);
         if (err != SCSI_DH_OK)
                 goto failed;
 
+        err = check_ownership(sdev, h);
+        if (err != SCSI_DH_OK)
+                goto clean_ctlr;
+
+        err = set_mode_select(sdev, h);
+        if (err != SCSI_DH_OK)
+                goto clean_ctlr;
+
         if (!try_module_get(THIS_MODULE))
-                goto failed;
+                goto clean_ctlr;
 
         spin_lock_irqsave(sdev->request_queue->queue_lock, flags);
         sdev->scsi_dh_data = scsi_dh_data;
@@ -691,6 +756,9 @@ static int rdac_bus_attach(struct scsi_device *sdev)
 
         return 0;
 
+clean_ctlr:
+        kref_put(&h->ctlr->kref, release_controller);
+
 failed:
         kfree(scsi_dh_data);
         sdev_printk(KERN_ERR, sdev, "%s: not attached\n",
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 0a5609bb5817..704b8e034946 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -1,5 +1,5 @@
 /*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -49,9 +49,20 @@ MODULE_AUTHOR("Open-FCoE.org");
 MODULE_DESCRIPTION("FCoE");
 MODULE_LICENSE("GPL v2");
 
+/* Performance tuning parameters for fcoe */
+static unsigned int fcoe_ddp_min;
+module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for "      \
+                 "Direct Data Placement (DDP).");
+
+DEFINE_MUTEX(fcoe_config_mutex);
+
+/* fcoe_percpu_clean completion.  Waiter protected by fcoe_create_mutex */
+static DECLARE_COMPLETION(fcoe_flush_completion);
+
 /* fcoe host list */
+/* must only by accessed under the RTNL mutex */
 LIST_HEAD(fcoe_hostlist);
-DEFINE_RWLOCK(fcoe_hostlist_lock);
 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
 
 /* Function Prototypes */
@@ -66,12 +77,13 @@ static int fcoe_link_ok(struct fc_lport *lp);
 
 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
 static int fcoe_hostlist_add(const struct fc_lport *);
-static int fcoe_hostlist_remove(const struct fc_lport *);
 
 static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
 static void fcoe_dev_setup(void);
 static void fcoe_dev_cleanup(void);
+static struct fcoe_interface *
+        fcoe_hostlist_lookup_port(const struct net_device *dev);
 
 /* notification function from net device */
 static struct notifier_block fcoe_notifier = {
@@ -132,6 +144,180 @@ static struct scsi_host_template fcoe_shost_template = {
         .max_sectors = 0xffff,
 };
 
+static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
+                         struct packet_type *ptype,
+                         struct net_device *orig_dev);
+/**
+ * fcoe_interface_setup()
+ * @fcoe: new fcoe_interface
+ * @netdev : ptr to the associated netdevice struct
+ *
+ * Returns : 0 for success
+ * Locking: must be called with the RTNL mutex held
+ */
+static int fcoe_interface_setup(struct fcoe_interface *fcoe,
+                                struct net_device *netdev)
+{
+        struct fcoe_ctlr *fip = &fcoe->ctlr;
+        struct netdev_hw_addr *ha;
+        u8 flogi_maddr[ETH_ALEN];
+
+        fcoe->netdev = netdev;
+
+        /* Do not support for bonding device */
+        if ((netdev->priv_flags & IFF_MASTER_ALB) ||
+            (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
+            (netdev->priv_flags & IFF_MASTER_8023AD)) {
+                return -EOPNOTSUPP;
+        }
+
+        /* look for SAN MAC address, if multiple SAN MACs exist, only
+         * use the first one for SPMA */
+        rcu_read_lock();
+        for_each_dev_addr(netdev, ha) {
+                if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
+                    (is_valid_ether_addr(fip->ctl_src_addr))) {
+                        memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
+                        fip->spma = 1;
+                        break;
+                }
+        }
+        rcu_read_unlock();
+
+        /* setup Source Mac Address */
+        if (!fip->spma)
+                memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
+
+        /*
+         * Add FCoE MAC address as second unicast MAC address
+         * or enter promiscuous mode if not capable of listening
+         * for multiple unicast MACs.
+         */
+        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+        dev_unicast_add(netdev, flogi_maddr);
+        if (fip->spma)
+                dev_unicast_add(netdev, fip->ctl_src_addr);
+        dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
+
+        /*
+         * setup the receive function from ethernet driver
+         * on the ethertype for the given device
+         */
+        fcoe->fcoe_packet_type.func = fcoe_rcv;
+        fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
+        fcoe->fcoe_packet_type.dev = netdev;
+        dev_add_pack(&fcoe->fcoe_packet_type);
+
+        fcoe->fip_packet_type.func = fcoe_fip_recv;
+        fcoe->fip_packet_type.type = htons(ETH_P_FIP);
+        fcoe->fip_packet_type.dev = netdev;
+        dev_add_pack(&fcoe->fip_packet_type);
+
+        return 0;
+}
+
+static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb);
+static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new);
+static void fcoe_destroy_work(struct work_struct *work);
+
+/**
+ * fcoe_interface_create()
+ * @netdev: network interface
+ *
+ * Returns: pointer to a struct fcoe_interface or NULL on error
+ */
+static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
+{
+        struct fcoe_interface *fcoe;
+
+        fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
+        if (!fcoe) {
+                FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
+                return NULL;
+        }
+
+        dev_hold(netdev);
+        kref_init(&fcoe->kref);
+
+        /*
+         * Initialize FIP.
+         */
+        fcoe_ctlr_init(&fcoe->ctlr);
+        fcoe->ctlr.send = fcoe_fip_send;
+        fcoe->ctlr.update_mac = fcoe_update_src_mac;
+
+        fcoe_interface_setup(fcoe, netdev);
+
+        return fcoe;
+}
+
+/**
+ * fcoe_interface_cleanup() - clean up netdev configurations
+ * @fcoe:
+ *
+ * Caller must be holding the RTNL mutex
+ */
+void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
+{
+        struct net_device *netdev = fcoe->netdev;
+        struct fcoe_ctlr *fip = &fcoe->ctlr;
+        u8 flogi_maddr[ETH_ALEN];
+
+        /*
+         * Don't listen for Ethernet packets anymore.
+         * synchronize_net() ensures that the packet handlers are not running
+         * on another CPU. dev_remove_pack() would do that, this calls the
+         * unsyncronized version __dev_remove_pack() to avoid multiple delays.
+         */
+        __dev_remove_pack(&fcoe->fcoe_packet_type);
+        __dev_remove_pack(&fcoe->fip_packet_type);
+        synchronize_net();
+
+        /* Delete secondary MAC addresses */
+        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+        dev_unicast_delete(netdev, flogi_maddr);
+        if (!is_zero_ether_addr(fip->data_src_addr))
+                dev_unicast_delete(netdev, fip->data_src_addr);
+        if (fip->spma)
+                dev_unicast_delete(netdev, fip->ctl_src_addr);
+        dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
+}
+
+/**
+ * fcoe_interface_release() - fcoe_port kref release function
+ * @kref: embedded reference count in an fcoe_interface struct
+ */
+static void fcoe_interface_release(struct kref *kref)
+{
+        struct fcoe_interface *fcoe;
+        struct net_device *netdev;
+
+        fcoe = container_of(kref, struct fcoe_interface, kref);
+        netdev = fcoe->netdev;
+        /* tear-down the FCoE controller */
+        fcoe_ctlr_destroy(&fcoe->ctlr);
+        kfree(fcoe);
+        dev_put(netdev);
+}
+
+/**
+ * fcoe_interface_get()
+ * @fcoe:
+ */
+static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
+{
+        kref_get(&fcoe->kref);
+}
+
+/**
+ * fcoe_interface_put()
+ * @fcoe:
+ */
+static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
+{
+        kref_put(&fcoe->kref, fcoe_interface_release);
+}
+
 /**
  * fcoe_fip_recv - handle a received FIP frame.
  * @skb: the receive skb
@@ -145,10 +331,10 @@ static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
                          struct packet_type *ptype,
                          struct net_device *orig_dev)
 {
-        struct fcoe_softc *fc;
+        struct fcoe_interface *fcoe;
 
-        fc = container_of(ptype, struct fcoe_softc, fip_packet_type);
-        fcoe_ctlr_recv(&fc->ctlr, skb);
+        fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
+        fcoe_ctlr_recv(&fcoe->ctlr, skb);
         return 0;
 }
 
@@ -159,7 +345,7 @@ static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
  */
 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
 {
-        skb->dev = fcoe_from_ctlr(fip)->real_dev;
+        skb->dev = fcoe_from_ctlr(fip)->netdev;
         dev_queue_xmit(skb);
 }
 
@@ -174,13 +360,13 @@ static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
  */
 static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
 {
-        struct fcoe_softc *fc;
+        struct fcoe_interface *fcoe;
 
-        fc = fcoe_from_ctlr(fip);
+        fcoe = fcoe_from_ctlr(fip);
         rtnl_lock();
         if (!is_zero_ether_addr(old))
-                dev_unicast_delete(fc->real_dev, old);
-        dev_unicast_add(fc->real_dev, new);
+                dev_unicast_delete(fcoe->netdev, old);
+        dev_unicast_add(fcoe->netdev, new);
         rtnl_unlock();
 }
 
@@ -217,30 +403,6 @@ static int fcoe_lport_config(struct fc_lport *lp)
 }
 
 /**
- * fcoe_netdev_cleanup() - clean up netdev configurations
- * @fc: ptr to the fcoe_softc
- */
-void fcoe_netdev_cleanup(struct fcoe_softc *fc)
-{
-        u8 flogi_maddr[ETH_ALEN];
-
-        /* Don't listen for Ethernet packets anymore */
-        dev_remove_pack(&fc->fcoe_packet_type);
-        dev_remove_pack(&fc->fip_packet_type);
-
-        /* Delete secondary MAC addresses */
-        rtnl_lock();
-        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
-        dev_unicast_delete(fc->real_dev, flogi_maddr);
-        if (!is_zero_ether_addr(fc->ctlr.data_src_addr))
-                dev_unicast_delete(fc->real_dev, fc->ctlr.data_src_addr);
-        if (fc->ctlr.spma)
-                dev_unicast_delete(fc->real_dev, fc->ctlr.ctl_src_addr);
-        dev_mc_delete(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
-        rtnl_unlock();
-}
-
-/**
  * fcoe_queue_timer() - fcoe queue timer
  * @lp: the fc_lport pointer
  *
@@ -265,116 +427,53 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 {
         u32 mfs;
         u64 wwnn, wwpn;
-        struct fcoe_softc *fc;
-        u8 flogi_maddr[ETH_ALEN];
-        struct netdev_hw_addr *ha;
+        struct fcoe_interface *fcoe;
+        struct fcoe_port *port;
 
         /* Setup lport private data to point to fcoe softc */
-        fc = lport_priv(lp);
-        fc->ctlr.lp = lp;
-        fc->real_dev = netdev;
-        fc->phys_dev = netdev;
-
-        /* Require support for get_pauseparam ethtool op. */
-        if (netdev->priv_flags & IFF_802_1Q_VLAN)
-                fc->phys_dev = vlan_dev_real_dev(netdev);
-
-        /* Do not support for bonding device */
-        if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
-            (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
-            (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
-                return -EOPNOTSUPP;
-        }
+        port = lport_priv(lp);
+        fcoe = port->fcoe;
 
         /*
          * Determine max frame size based on underlying device and optional
          * user-configured limit.  If the MFS is too low, fcoe_link_ok()
          * will return 0, so do this first.
          */
-        mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
-                                   sizeof(struct fcoe_crc_eof));
+        mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
+                             sizeof(struct fcoe_crc_eof));
         if (fc_set_mfs(lp, mfs))
                 return -EINVAL;
 
         /* offload features support */
-        if (fc->real_dev->features & NETIF_F_SG)
+        if (netdev->features & NETIF_F_SG)
                 lp->sg_supp = 1;
 
-#ifdef NETIF_F_FCOE_CRC
         if (netdev->features & NETIF_F_FCOE_CRC) {
                 lp->crc_offload = 1;
                 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
         }
-#endif
-#ifdef NETIF_F_FSO
         if (netdev->features & NETIF_F_FSO) {
                 lp->seq_offload = 1;
                 lp->lso_max = netdev->gso_max_size;
                 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
                                 lp->lso_max);
         }
-#endif
         if (netdev->fcoe_ddp_xid) {
                 lp->lro_enabled = 1;
                 lp->lro_xid = netdev->fcoe_ddp_xid;
                 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
                                 lp->lro_xid);
         }
-        skb_queue_head_init(&fc->fcoe_pending_queue);
-        fc->fcoe_pending_queue_active = 0;
-        setup_timer(&fc->timer, fcoe_queue_timer, (unsigned long)lp);
-
-        /* look for SAN MAC address, if multiple SAN MACs exist, only
-         * use the first one for SPMA */
-        rcu_read_lock();
-        for_each_dev_addr(netdev, ha) {
-                if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
-                    (is_valid_ether_addr(fc->ctlr.ctl_src_addr))) {
-                        memcpy(fc->ctlr.ctl_src_addr, ha->addr, ETH_ALEN);
-                        fc->ctlr.spma = 1;
-                        break;
-                }
-        }
-        rcu_read_unlock();
-
-        /* setup Source Mac Address */
-        if (!fc->ctlr.spma)
-                memcpy(fc->ctlr.ctl_src_addr, fc->real_dev->dev_addr,
-                       fc->real_dev->addr_len);
+        skb_queue_head_init(&port->fcoe_pending_queue);
+        port->fcoe_pending_queue_active = 0;
+        setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lp);
 
-        wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
+        wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0);
         fc_set_wwnn(lp, wwnn);
         /* XXX - 3rd arg needs to be vlan id */
-        wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
+        wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0);
         fc_set_wwpn(lp, wwpn);
 
-        /*
-         * Add FCoE MAC address as second unicast MAC address
-         * or enter promiscuous mode if not capable of listening
-         * for multiple unicast MACs.
-         */
-        rtnl_lock();
-        memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
-        dev_unicast_add(fc->real_dev, flogi_maddr);
-        if (fc->ctlr.spma)
-                dev_unicast_add(fc->real_dev, fc->ctlr.ctl_src_addr);
-        dev_mc_add(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
-        rtnl_unlock();
-
-        /*
-         * setup the receive function from ethernet driver
-         * on the ethertype for the given device
-         */
-        fc->fcoe_packet_type.func = fcoe_rcv;
-        fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
-        fc->fcoe_packet_type.dev = fc->real_dev;
-        dev_add_pack(&fc->fcoe_packet_type);
-
-        fc->fip_packet_type.func = fcoe_fip_recv;
-        fc->fip_packet_type.type = htons(ETH_P_FIP);
-        fc->fip_packet_type.dev = fc->real_dev;
-        dev_add_pack(&fc->fip_packet_type);
-
         return 0;
 }
 
@@ -415,86 +514,140 @@ static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
         return 0;
 }
 
+/*
+ * fcoe_oem_match() - match for read types IO
+ * @fp: the fc_frame for new IO.
+ *
+ * Returns : true for read types IO, otherwise returns false.
+ */
+bool fcoe_oem_match(struct fc_frame *fp)
+{
+        return fc_fcp_is_read(fr_fsp(fp)) &&
+                (fr_fsp(fp)->data_len > fcoe_ddp_min);
+}
+
 /**
  * fcoe_em_config() - allocates em for this lport
- * @lp: the port that em is to allocated for
+ * @lp: the fcoe that em is to allocated for
  *
  * Returns : 0 on success
  */
 static inline int fcoe_em_config(struct fc_lport *lp)
 {
-        BUG_ON(lp->emp);
+        struct fcoe_port *port = lport_priv(lp);
+        struct fcoe_interface *fcoe = port->fcoe;
+        struct fcoe_interface *oldfcoe = NULL;
+        struct net_device *old_real_dev, *cur_real_dev;
+        u16 min_xid = FCOE_MIN_XID;
+        u16 max_xid = FCOE_MAX_XID;
 
-        lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
-                                    FCOE_MIN_XID, FCOE_MAX_XID);
-        if (!lp->emp)
+        /*
+         * Check if need to allocate an em instance for
+         * offload exchange ids to be shared across all VN_PORTs/lport.
+         */
+        if (!lp->lro_enabled || !lp->lro_xid || (lp->lro_xid >= max_xid)) {
+                lp->lro_xid = 0;
+                goto skip_oem;
+        }
+
+        /*
+         * Reuse existing offload em instance in case
+         * it is already allocated on real eth device
+         */
+        if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
+                cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
+        else
+                cur_real_dev = fcoe->netdev;
+
+        list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
+                if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
+                        old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
+                else
+                        old_real_dev = oldfcoe->netdev;
+
+                if (cur_real_dev == old_real_dev) {
+                        fcoe->oem = oldfcoe->oem;
+                        break;
+                }
+        }
+
+        if (fcoe->oem) {
+                if (!fc_exch_mgr_add(lp, fcoe->oem, fcoe_oem_match)) {
+                        printk(KERN_ERR "fcoe_em_config: failed to add "
+                               "offload em:%p on interface:%s\n",
+                               fcoe->oem, fcoe->netdev->name);
+                        return -ENOMEM;
+                }
+        } else {
+                fcoe->oem = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+                                            FCOE_MIN_XID, lp->lro_xid,
+                                            fcoe_oem_match);
+                if (!fcoe->oem) {
+                        printk(KERN_ERR "fcoe_em_config: failed to allocate "
+                               "em for offload exches on interface:%s\n",
+                               fcoe->netdev->name);
+                        return -ENOMEM;
+                }
+        }
+
+        /*
+         * Exclude offload EM xid range from next EM xid range.
+         */
+        min_xid += lp->lro_xid + 1;
+
+skip_oem:
+        if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, min_xid, max_xid, NULL)) {
+                printk(KERN_ERR "fcoe_em_config: failed to "
+                       "allocate em on interface %s\n", fcoe->netdev->name);
                 return -ENOMEM;
+        }
 
         return 0;
 }
 
 /**
  * fcoe_if_destroy() - FCoE software HBA tear-down function
- * @netdev: ptr to the associated net_device
- *
- * Returns: 0 if link is OK for use by FCoE.
+ * @lport: fc_lport to destroy
  */
-static int fcoe_if_destroy(struct net_device *netdev)
+static void fcoe_if_destroy(struct fc_lport *lport)
 {
-        struct fc_lport *lp = NULL;
-        struct fcoe_softc *fc;
-
-        BUG_ON(!netdev);
+        struct fcoe_port *port = lport_priv(lport);
+        struct fcoe_interface *fcoe = port->fcoe;
+        struct net_device *netdev = fcoe->netdev;
 
         FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
 
-        lp = fcoe_hostlist_lookup(netdev);
-        if (!lp)
-                return -ENODEV;
-
-        fc = lport_priv(lp);
-
         /* Logout of the fabric */
-        fc_fabric_logoff(lp);
+        fc_fabric_logoff(lport);
 
-        /* Remove the instance from fcoe's list */
-        fcoe_hostlist_remove(lp);
+        /* Cleanup the fc_lport */
+        fc_lport_destroy(lport);
+        fc_fcp_destroy(lport);
 
-        /* clean up netdev configurations */
-        fcoe_netdev_cleanup(fc);
+        /* Stop the transmit retry timer */
+        del_timer_sync(&port->timer);
 
-        /* tear-down the FCoE controller */
-        fcoe_ctlr_destroy(&fc->ctlr);
+        /* Free existing transmit skbs */
+        fcoe_clean_pending_queue(lport);
 
-        /* Cleanup the fc_lport */
-        fc_lport_destroy(lp);
-        fc_fcp_destroy(lp);
+        /* receives may not be stopped until after this */
+        fcoe_interface_put(fcoe);
+
+        /* Free queued packets for the per-CPU receive threads */
+        fcoe_percpu_clean(lport);
 
         /* Detach from the scsi-ml */
-        fc_remove_host(lp->host);
-        scsi_remove_host(lp->host);
+        fc_remove_host(lport->host);
+        scsi_remove_host(lport->host);
 
         /* There are no more rports or I/O, free the EM */
-        if (lp->emp)
-                fc_exch_mgr_free(lp->emp);
-
-        /* Free the per-CPU receive threads */
-        fcoe_percpu_clean(lp);
-
-        /* Free existing skbs */
-        fcoe_clean_pending_queue(lp);
-
-        /* Stop the timer */
-        del_timer_sync(&fc->timer);
+        fc_exch_mgr_free(lport);
 
         /* Free memory used by statistical counters */
-        fc_lport_free_stats(lp);
-
-        /* Release the net_device and Scsi_Host */
-        dev_put(fc->real_dev);
-        scsi_host_put(lp->host);
+        fc_lport_free_stats(lport);
 
-        return 0;
+        /* Release the Scsi_Host */
+        scsi_host_put(lport->host);
 }
 
 /*
@@ -540,106 +693,96 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = {
 };
 
 /**
- * fcoe_if_create() - this function creates the fcoe interface
- * @netdev: pointer the associated netdevice
+ * fcoe_if_create() - this function creates the fcoe port
+ * @fcoe: fcoe_interface structure to create an fc_lport instance on
+ * @parent: device pointer to be the parent in sysfs for the SCSI host
  *
- * Creates fc_lport struct and scsi_host for lport, configures lport
- * and starts fabric login.
+ * Creates fc_lport struct and scsi_host for lport, configures lport.
  *
- * Returns : 0 on success
+ * Returns : The allocated fc_lport or an error pointer
  */
-static int fcoe_if_create(struct net_device *netdev)
+static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
+                                       struct device *parent)
 {
         int rc;
-        struct fc_lport *lp = NULL;
-        struct fcoe_softc *fc;
+        struct fc_lport *lport = NULL;
+        struct fcoe_port *port;
         struct Scsi_Host *shost;
-
-        BUG_ON(!netdev);
+        struct net_device *netdev = fcoe->netdev;
 
         FCOE_NETDEV_DBG(netdev, "Create Interface\n");
 
-        lp = fcoe_hostlist_lookup(netdev);
-        if (lp)
-                return -EEXIST;
-
         shost = libfc_host_alloc(&fcoe_shost_template,
-                                 sizeof(struct fcoe_softc));
+                                 sizeof(struct fcoe_port));
         if (!shost) {
                 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
-                return -ENOMEM;
+                rc = -ENOMEM;
+                goto out;
         }
-        lp = shost_priv(shost);
-        fc = lport_priv(lp);
+        lport = shost_priv(shost);
+        port = lport_priv(lport);
+        port->lport = lport;
+        port->fcoe = fcoe;
+        INIT_WORK(&port->destroy_work, fcoe_destroy_work);
 
         /* configure fc_lport, e.g., em */
-        rc = fcoe_lport_config(lp);
+        rc = fcoe_lport_config(lport);
         if (rc) {
                 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
                                 "interface\n");
                 goto out_host_put;
         }
 
-        /*
-         * Initialize FIP.
-         */
-        fcoe_ctlr_init(&fc->ctlr);
-        fc->ctlr.send = fcoe_fip_send;
-        fc->ctlr.update_mac = fcoe_update_src_mac;
-
         /* configure lport network properties */
-        rc = fcoe_netdev_config(lp, netdev);
+        rc = fcoe_netdev_config(lport, netdev);
         if (rc) {
                 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
                                 "interface\n");
-                goto out_netdev_cleanup;
+                goto out_lp_destroy;
         }
 
         /* configure lport scsi host properties */
-        rc = fcoe_shost_config(lp, shost, &netdev->dev);
+        rc = fcoe_shost_config(lport, shost, parent);
         if (rc) {
                 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
                                 "interface\n");
-                goto out_netdev_cleanup;
-        }
-
-        /* lport exch manager allocation */
-        rc = fcoe_em_config(lp);
-        if (rc) {
-                FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
-                                "interface\n");
-                goto out_netdev_cleanup;
+                goto out_lp_destroy;
         }
 
         /* Initialize the library */
-        rc = fcoe_libfc_config(lp, &fcoe_libfc_fcn_templ);
+        rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
         if (rc) {
                 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
                                 "interface\n");
                 goto out_lp_destroy;
         }
 
-        /* add to lports list */
-        fcoe_hostlist_add(lp);
-
-        lp->boot_time = jiffies;
-
-        fc_fabric_login(lp);
-
-        if (!fcoe_link_ok(lp))
-                fcoe_ctlr_link_up(&fc->ctlr);
+        /*
+         * fcoe_em_alloc() and fcoe_hostlist_add() both
+         * need to be atomic with respect to other changes to the hostlist
+         * since fcoe_em_alloc() looks for an existing EM
+         * instance on host list updated by fcoe_hostlist_add().
+         *
+         * This is currently handled through the fcoe_config_mutex begin held.
+         */
 
-        dev_hold(netdev);
+        /* lport exch manager allocation */
+        rc = fcoe_em_config(lport);
+        if (rc) {
+                FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
+                                "interface\n");
+                goto out_lp_destroy;
+        }
 
-        return rc;
+        fcoe_interface_get(fcoe);
+        return lport;
 
 out_lp_destroy:
-        fc_exch_mgr_free(lp->emp); /* Free the EM */
-out_netdev_cleanup:
-        fcoe_netdev_cleanup(fc);
+        fc_exch_mgr_free(lport);
 out_host_put:
-        scsi_host_put(lp->host);
-        return rc;
+        scsi_host_put(lport->host);
+out:
+        return ERR_PTR(rc);
 }
 
 /**
@@ -669,6 +812,7 @@ static int __init fcoe_if_init(void)
 int __exit fcoe_if_exit(void)
 {
         fc_release_transport(scsi_transport_fcoe_sw);
+        scsi_transport_fcoe_sw = NULL;
         return 0;
 }
 
@@ -686,7 +830,7 @@ static void fcoe_percpu_thread_create(unsigned int cpu)
         thread = kthread_create(fcoe_percpu_receive_thread,
                                 (void *)p, "fcoethread/%d", cpu);
 
-        if (likely(!IS_ERR(p->thread))) {
+        if (likely(!IS_ERR(thread))) {
                 kthread_bind(thread, cpu);
                 wake_up_process(thread);
 
@@ -838,14 +982,13 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
 {
         struct fc_lport *lp;
         struct fcoe_rcv_info *fr;
-        struct fcoe_softc *fc;
+        struct fcoe_interface *fcoe;
         struct fc_frame_header *fh;
         struct fcoe_percpu_s *fps;
-        unsigned short oxid;
-        unsigned int cpu = 0;
+        unsigned int cpu;
 
-        fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
-        lp = fc->ctlr.lp;
+        fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
+        lp = fcoe->ctlr.lp;
         if (unlikely(lp == NULL)) {
                 FCOE_NETDEV_DBG(dev, "Cannot find hba structure");
                 goto err2;
@@ -876,20 +1019,20 @@ int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
         skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
         fh = (struct fc_frame_header *) skb_transport_header(skb);
 
-        oxid = ntohs(fh->fh_ox_id);
-
         fr = fcoe_dev_from_skb(skb);
         fr->fr_dev = lp;
         fr->ptype = ptype;
 
-#ifdef CONFIG_SMP
         /*
-         * The incoming frame exchange id(oxid) is ANDed with num of online
-         * cpu bits to get cpu and then this cpu is used for selecting
-         * a per cpu kernel thread from fcoe_percpu.
+         * In case the incoming frame's exchange is originated from
+         * the initiator, then received frame's exchange id is ANDed
+         * with fc_cpu_mask bits to get the same cpu on which exchange
+         * was originated, otherwise just use the current cpu.
          */
-        cpu = oxid & (num_online_cpus() - 1);
-#endif
+        if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
+                cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
+        else
+                cpu = smp_processor_id();
 
         fps = &per_cpu(fcoe_percpu, cpu);
         spin_lock_bh(&fps->fcoe_rx_list.lock);
@@ -996,7 +1139,7 @@ static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
  * fcoe_fc_crc() - calculates FC CRC in this fcoe skb
  * @fp: the fc_frame containing data to be checksummed
  *
- * This uses crc32() to calculate the crc for fc frame
+ * This uses crc32() to calculate the crc for port frame
  * Return   : 32 bit crc
  */
 u32 fcoe_fc_crc(struct fc_frame *fp)
@@ -1029,7 +1172,7 @@ u32 fcoe_fc_crc(struct fc_frame *fp)
 
 /**
  * fcoe_xmit() - FCoE frame transmit function
- * @lp: the associated local port
+ * @lp: the associated local fcoe
  * @fp: the fc_frame to be transmitted
  *
  * Return   : 0 for success
@@ -1046,13 +1189,13 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
         unsigned int hlen;              /* header length implies the version */
         unsigned int tlen;              /* trailer length */
         unsigned int elen;              /* eth header, may include vlan */
-        struct fcoe_softc *fc;
+        struct fcoe_port *port = lport_priv(lp);
+        struct fcoe_interface *fcoe = port->fcoe;
         u8 sof, eof;
         struct fcoe_hdr *hp;
 
         WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
 
-        fc = lport_priv(lp);
         fh = fc_frame_header_get(fp);
         skb = fp_skb(fp);
         wlen = skb->len / FCOE_WORD_TO_BYTE;
@@ -1063,7 +1206,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
         }
 
         if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
-            fcoe_ctlr_els_send(&fc->ctlr, skb))
+            fcoe_ctlr_els_send(&fcoe->ctlr, skb))
                 return 0;
 
         sof = fr_sof(fp);
@@ -1085,7 +1228,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
                 crc = fcoe_fc_crc(fp);
         }
 
-        /* copy fc crc and eof to the skb buff */
+        /* copy port crc and eof to the skb buff */
         if (skb_is_nonlinear(skb)) {
                 skb_frag_t *frag;
                 if (fcoe_get_paged_crc_eof(skb, tlen)) {
@@ -1108,27 +1251,27 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
                 cp = NULL;
         }
 
-        /* adjust skb network/transport offsets to match mac/fcoe/fc */
+        /* adjust skb network/transport offsets to match mac/fcoe/port */
         skb_push(skb, elen + hlen);
         skb_reset_mac_header(skb);
         skb_reset_network_header(skb);
         skb->mac_len = elen;
         skb->protocol = htons(ETH_P_FCOE);
-        skb->dev = fc->real_dev;
+        skb->dev = fcoe->netdev;
 
         /* fill up mac and fcoe headers */
         eh = eth_hdr(skb);
         eh->h_proto = htons(ETH_P_FCOE);
-        if (fc->ctlr.map_dest)
+        if (fcoe->ctlr.map_dest)
                 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
         else
                 /* insert GW address */
-                memcpy(eh->h_dest, fc->ctlr.dest_addr, ETH_ALEN);
+                memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
 
-        if (unlikely(fc->ctlr.flogi_oxid != FC_XID_UNKNOWN))
-                memcpy(eh->h_source, fc->ctlr.ctl_src_addr, ETH_ALEN);
+        if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
+                memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
         else
-                memcpy(eh->h_source, fc->ctlr.data_src_addr, ETH_ALEN);
+                memcpy(eh->h_source, fcoe->ctlr.data_src_addr, ETH_ALEN);
 
         hp = (struct fcoe_hdr *)(eh + 1);
         memset(hp, 0, sizeof(*hp));
@@ -1136,7 +1279,6 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
                 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
         hp->fcoe_sof = sof;
 
-#ifdef NETIF_F_FSO
         /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
         if (lp->seq_offload && fr_max_payload(fp)) {
                 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
@@ -1145,7 +1287,6 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
                 skb_shinfo(skb)->gso_type = 0;
                 skb_shinfo(skb)->gso_size = 0;
         }
-#endif
         /* update tx stats: regardless if LLD fails */
         stats = fc_lport_get_stats(lp);
         stats->TxFrames++;
@@ -1153,7 +1294,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 
         /* send down to lld */
         fr_dev(fp) = lp;
-        if (fc->fcoe_pending_queue.qlen)
+        if (port->fcoe_pending_queue.qlen)
                 fcoe_check_wait_queue(lp, skb);
         else if (fcoe_start_io(skb))
                 fcoe_check_wait_queue(lp, skb);
@@ -1162,6 +1303,15 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 }
 
 /**
+ * fcoe_percpu_flush_done() - Indicate percpu queue flush completion.
+ * @skb: the skb being completed.
+ */
+static void fcoe_percpu_flush_done(struct sk_buff *skb)
+{
+        complete(&fcoe_flush_completion);
+}
+
+/**
  * fcoe_percpu_receive_thread() - recv thread per cpu
  * @arg: ptr to the fcoe per cpu struct
  *
@@ -1179,7 +1329,7 @@ int fcoe_percpu_receive_thread(void *arg)
         struct fcoe_crc_eof crc_eof;
         struct fc_frame *fp;
         u8 *mac = NULL;
-        struct fcoe_softc *fc;
+        struct fcoe_port *port;
         struct fcoe_hdr *hp;
 
         set_user_nice(current, -20);
@@ -1200,7 +1350,8 @@ int fcoe_percpu_receive_thread(void *arg)
                 fr = fcoe_dev_from_skb(skb);
                 lp = fr->fr_dev;
                 if (unlikely(lp == NULL)) {
-                        FCOE_NETDEV_DBG(skb->dev, "Invalid HBA Structure");
+                        if (skb->destructor != fcoe_percpu_flush_done)
+                                FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
                         kfree_skb(skb);
                         continue;
                 }
@@ -1215,7 +1366,7 @@ int fcoe_percpu_receive_thread(void *arg)
                 /*
                  * Save source MAC address before discarding header.
                  */
-                fc = lport_priv(lp);
+                port = lport_priv(lp);
                 if (skb_is_nonlinear(skb))
                         skb_linearize(skb);     /* not ideal */
                 mac = eth_hdr(skb)->h_source;
@@ -1277,7 +1428,7 @@ int fcoe_percpu_receive_thread(void *arg)
                 fh = fc_frame_header_get(fp);
                 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
                     fh->fh_type == FC_TYPE_FCP) {
-                        fc_exch_recv(lp, lp->emp, fp);
+                        fc_exch_recv(lp, fp);
                         continue;
                 }
                 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
@@ -1293,12 +1444,12 @@ int fcoe_percpu_receive_thread(void *arg)
                         }
                         fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
                 }
-                if (unlikely(fc->ctlr.flogi_oxid != FC_XID_UNKNOWN) &&
-                    fcoe_ctlr_recv_flogi(&fc->ctlr, fp, mac)) {
+                if (unlikely(port->fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN) &&
+                    fcoe_ctlr_recv_flogi(&port->fcoe->ctlr, fp, mac)) {
                         fc_frame_free(fp);
                         continue;
                 }
-                fc_exch_recv(lp, lp->emp, fp);
+                fc_exch_recv(lp, fp);
         }
         return 0;
 }
@@ -1318,46 +1469,46 @@ int fcoe_percpu_receive_thread(void *arg)
  */
 static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb)
 {
-        struct fcoe_softc *fc = lport_priv(lp);
+        struct fcoe_port *port = lport_priv(lp);
         int rc;
 
-        spin_lock_bh(&fc->fcoe_pending_queue.lock);
+        spin_lock_bh(&port->fcoe_pending_queue.lock);
 
         if (skb)
-                __skb_queue_tail(&fc->fcoe_pending_queue, skb);
+                __skb_queue_tail(&port->fcoe_pending_queue, skb);
 
-        if (fc->fcoe_pending_queue_active)
+        if (port->fcoe_pending_queue_active)
                 goto out;
-        fc->fcoe_pending_queue_active = 1;
+        port->fcoe_pending_queue_active = 1;
 
-        while (fc->fcoe_pending_queue.qlen) {
+        while (port->fcoe_pending_queue.qlen) {
                 /* keep qlen > 0 until fcoe_start_io succeeds */
-                fc->fcoe_pending_queue.qlen++;
-                skb = __skb_dequeue(&fc->fcoe_pending_queue);
+                port->fcoe_pending_queue.qlen++;
+                skb = __skb_dequeue(&port->fcoe_pending_queue);
 
-                spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+                spin_unlock_bh(&port->fcoe_pending_queue.lock);
                 rc = fcoe_start_io(skb);
-                spin_lock_bh(&fc->fcoe_pending_queue.lock);
+                spin_lock_bh(&port->fcoe_pending_queue.lock);
 
                 if (rc) {
-                        __skb_queue_head(&fc->fcoe_pending_queue, skb);
+                        __skb_queue_head(&port->fcoe_pending_queue, skb);
                         /* undo temporary increment above */
-                        fc->fcoe_pending_queue.qlen--;
+                        port->fcoe_pending_queue.qlen--;
                         break;
                 }
                 /* undo temporary increment above */
-                fc->fcoe_pending_queue.qlen--;
+                port->fcoe_pending_queue.qlen--;
         }
 
-        if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
+        if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
                 lp->qfull = 0;
-        if (fc->fcoe_pending_queue.qlen && !timer_pending(&fc->timer))
-                mod_timer(&fc->timer, jiffies + 2);
-        fc->fcoe_pending_queue_active = 0;
+        if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
+                mod_timer(&port->timer, jiffies + 2);
+        port->fcoe_pending_queue_active = 0;
 out:
-        if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+        if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
                 lp->qfull = 1;
-        spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+        spin_unlock_bh(&port->fcoe_pending_queue.lock);
         return;
 }
 
@@ -1391,21 +1542,20 @@ static int fcoe_device_notification(struct notifier_block *notifier,
                                     ulong event, void *ptr)
 {
         struct fc_lport *lp = NULL;
-        struct net_device *real_dev = ptr;
-        struct fcoe_softc *fc;
+        struct net_device *netdev = ptr;
+        struct fcoe_interface *fcoe;
+        struct fcoe_port *port;
         struct fcoe_dev_stats *stats;
         u32 link_possible = 1;
         u32 mfs;
         int rc = NOTIFY_OK;
 
-        read_lock(&fcoe_hostlist_lock);
-        list_for_each_entry(fc, &fcoe_hostlist, list) {
-                if (fc->real_dev == real_dev) {
-                        lp = fc->ctlr.lp;
+        list_for_each_entry(fcoe, &fcoe_hostlist, list) {
+                if (fcoe->netdev == netdev) {
+                        lp = fcoe->ctlr.lp;
                         break;
                 }
         }
-        read_unlock(&fcoe_hostlist_lock);
         if (lp == NULL) {
                 rc = NOTIFY_DONE;
                 goto out;
@@ -1420,21 +1570,27 @@ static int fcoe_device_notification(struct notifier_block *notifier,
         case NETDEV_CHANGE:
                 break;
         case NETDEV_CHANGEMTU:
-                mfs = fc->real_dev->mtu -
-                        (sizeof(struct fcoe_hdr) +
-                         sizeof(struct fcoe_crc_eof));
+                mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
+                                     sizeof(struct fcoe_crc_eof));
                 if (mfs >= FC_MIN_MAX_FRAME)
                         fc_set_mfs(lp, mfs);
                 break;
         case NETDEV_REGISTER:
                 break;
+        case NETDEV_UNREGISTER:
+                list_del(&fcoe->list);
+                port = lport_priv(fcoe->ctlr.lp);
+                fcoe_interface_cleanup(fcoe);
+                schedule_work(&port->destroy_work);
+                goto out;
+                break;
         default:
-                FCOE_NETDEV_DBG(real_dev, "Unknown event %ld "
+                FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
                                 "from netdev netlink\n", event);
         }
         if (link_possible && !fcoe_link_ok(lp))
-                fcoe_ctlr_link_up(&fc->ctlr);
-        else if (fcoe_ctlr_link_down(&fc->ctlr)) {
+                fcoe_ctlr_link_up(&fcoe->ctlr);
+        else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
                 stats = fc_lport_get_stats(lp);
                 stats->LinkFailureCount++;
                 fcoe_clean_pending_queue(lp);
@@ -1465,75 +1621,6 @@ static struct net_device *fcoe_if_to_netdev(const char *buffer)
 }
 
 /**
- * fcoe_netdev_to_module_owner() - finds out the driver module of the netdev
- * @netdev: the target netdev
- *
- * Returns: ptr to the struct module, NULL for failure
- */
-static struct module *
-fcoe_netdev_to_module_owner(const struct net_device *netdev)
-{
-        struct device *dev;
-
-        if (!netdev)
-                return NULL;
-
-        dev = netdev->dev.parent;
-        if (!dev)
-                return NULL;
-
-        if (!dev->driver)
-                return NULL;
-
-        return dev->driver->owner;
-}
-
-/**
- * fcoe_ethdrv_get() - Hold the Ethernet driver
- * @netdev: the target netdev
- *
- * Holds the Ethernet driver module by try_module_get() for
- * the corresponding netdev.
- *
- * Returns: 0 for success
- */
-static int fcoe_ethdrv_get(const struct net_device *netdev)
-{
-        struct module *owner;
-
-        owner = fcoe_netdev_to_module_owner(netdev);
-        if (owner) {
-                FCOE_NETDEV_DBG(netdev, "Hold driver module %s\n",
-                                module_name(owner));
-                return  try_module_get(owner);
-        }
-        return -ENODEV;
-}
-
-/**
- * fcoe_ethdrv_put() - Release the Ethernet driver
- * @netdev: the target netdev
- *
- * Releases the Ethernet driver module by module_put for
- * the corresponding netdev.
- *
- * Returns: 0 for success
- */
-static int fcoe_ethdrv_put(const struct net_device *netdev)
-{
-        struct module *owner;
-
-        owner = fcoe_netdev_to_module_owner(netdev);
-        if (owner) {
-                FCOE_NETDEV_DBG(netdev, "Release driver module %s\n",
-                                module_name(owner));
-                module_put(owner);
-                return 0;
-        }
-        return -ENODEV;
-}
-
-/**
  * fcoe_destroy() - handles the destroy from sysfs
  * @buffer: expected to be an eth if name
  * @kp: associated kernel param
@@ -1542,34 +1629,57 @@ static int fcoe_ethdrv_put(const struct net_device *netdev)
  */
 static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
 {
-        int rc;
+        struct fcoe_interface *fcoe;
         struct net_device *netdev;
+        int rc;
+
+        mutex_lock(&fcoe_config_mutex);
+#ifdef CONFIG_FCOE_MODULE
+        /*
+         * Make sure the module has been initialized, and is not about to be
+         * removed.  Module paramter sysfs files are writable before the
+         * module_init function is called and after module_exit.
+         */
+        if (THIS_MODULE->state != MODULE_STATE_LIVE) {
+                rc = -ENODEV;
+                goto out_nodev;
+        }
+#endif
 
         netdev = fcoe_if_to_netdev(buffer);
         if (!netdev) {
                 rc = -ENODEV;
                 goto out_nodev;
         }
-        /* look for existing lport */
-        if (!fcoe_hostlist_lookup(netdev)) {
+
+        rtnl_lock();
+        fcoe = fcoe_hostlist_lookup_port(netdev);
+        if (!fcoe) {
+                rtnl_unlock();
                 rc = -ENODEV;
                 goto out_putdev;
         }
-        rc = fcoe_if_destroy(netdev);
-        if (rc) {
-                printk(KERN_ERR "fcoe: Failed to destroy interface (%s)\n",
-                       netdev->name);
-                rc = -EIO;
-                goto out_putdev;
-        }
-        fcoe_ethdrv_put(netdev);
-        rc = 0;
+        list_del(&fcoe->list);
+        fcoe_interface_cleanup(fcoe);
+        rtnl_unlock();
+        fcoe_if_destroy(fcoe->ctlr.lp);
 out_putdev:
         dev_put(netdev);
 out_nodev:
+        mutex_unlock(&fcoe_config_mutex);
         return rc;
 }
 
+static void fcoe_destroy_work(struct work_struct *work)
+{
+        struct fcoe_port *port;
+
+        port = container_of(work, struct fcoe_port, destroy_work);
+        mutex_lock(&fcoe_config_mutex);
+        fcoe_if_destroy(port->lport);
+        mutex_unlock(&fcoe_config_mutex);
+}
+
 /**
  * fcoe_create() - Handles the create call from sysfs
  * @buffer: expected to be an eth if name
@@ -1580,41 +1690,84 @@ out_nodev:
 static int fcoe_create(const char *buffer, struct kernel_param *kp)
 {
         int rc;
+        struct fcoe_interface *fcoe;
+        struct fc_lport *lport;
         struct net_device *netdev;
 
+        mutex_lock(&fcoe_config_mutex);
+#ifdef CONFIG_FCOE_MODULE
+        /*
+         * Make sure the module has been initialized, and is not about to be
+         * removed.  Module paramter sysfs files are writable before the
+         * module_init function is called and after module_exit.
+         */
+        if (THIS_MODULE->state != MODULE_STATE_LIVE) {
+                rc = -ENODEV;
+                goto out_nodev;
+        }
+#endif
+
+        rtnl_lock();
         netdev = fcoe_if_to_netdev(buffer);
         if (!netdev) {
                 rc = -ENODEV;
                 goto out_nodev;
         }
+
         /* look for existing lport */
         if (fcoe_hostlist_lookup(netdev)) {
                 rc = -EEXIST;
                 goto out_putdev;
         }
-        fcoe_ethdrv_get(netdev);
 
-        rc = fcoe_if_create(netdev);
-        if (rc) {
+        fcoe = fcoe_interface_create(netdev);
+        if (!fcoe) {
+                rc = -ENOMEM;
+                goto out_putdev;
+        }
+
+        lport = fcoe_if_create(fcoe, &netdev->dev);
+        if (IS_ERR(lport)) {
                 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
                        netdev->name);
-                fcoe_ethdrv_put(netdev);
                 rc = -EIO;
-                goto out_putdev;
+                fcoe_interface_cleanup(fcoe);
+                goto out_free;
         }
+
+        /* Make this the "master" N_Port */
+        fcoe->ctlr.lp = lport;
+
+        /* add to lports list */
+        fcoe_hostlist_add(lport);
+
+        /* start FIP Discovery and FLOGI */
+        lport->boot_time = jiffies;
+        fc_fabric_login(lport);
+        if (!fcoe_link_ok(lport))
+                fcoe_ctlr_link_up(&fcoe->ctlr);
+
         rc = 0;
+out_free:
+        /*
+         * Release from init in fcoe_interface_create(), on success lport
+         * should be holding a reference taken in fcoe_if_create().
+         */
+        fcoe_interface_put(fcoe);
 out_putdev:
         dev_put(netdev);
 out_nodev:
+        rtnl_unlock();
+        mutex_unlock(&fcoe_config_mutex);
         return rc;
 }
 
 module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
 __MODULE_PARM_TYPE(create, "string");
-MODULE_PARM_DESC(create, "Create fcoe port using net device passed in.");
+MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
 module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
 __MODULE_PARM_TYPE(destroy, "string");
-MODULE_PARM_DESC(destroy, "Destroy fcoe port");
+MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
 
 /**
  * fcoe_link_ok() - Check if link is ok for the fc_lport
@@ -1632,37 +1785,40 @@ MODULE_PARM_DESC(destroy, "Destroy fcoe port");
  */
 int fcoe_link_ok(struct fc_lport *lp)
 {
-        struct fcoe_softc *fc = lport_priv(lp);
-        struct net_device *dev = fc->real_dev;
+        struct fcoe_port *port = lport_priv(lp);
+        struct net_device *dev = port->fcoe->netdev;
         struct ethtool_cmd ecmd = { ETHTOOL_GSET };
-        int rc = 0;
 
-        if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
-                dev = fc->phys_dev;
-                if (dev->ethtool_ops->get_settings) {
-                        dev->ethtool_ops->get_settings(dev, &ecmd);
-                        lp->link_supported_speeds &=
-                                ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
-                        if (ecmd.supported & (SUPPORTED_1000baseT_Half |
-                                              SUPPORTED_1000baseT_Full))
-                                lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
-                        if (ecmd.supported & SUPPORTED_10000baseT_Full)
-                                lp->link_supported_speeds |=
-                                        FC_PORTSPEED_10GBIT;
-                        if (ecmd.speed == SPEED_1000)
-                                lp->link_speed = FC_PORTSPEED_1GBIT;
-                        if (ecmd.speed == SPEED_10000)
-                                lp->link_speed = FC_PORTSPEED_10GBIT;
-                }
-        } else
-                rc = -1;
+        if ((dev->flags & IFF_UP) && netif_carrier_ok(dev) &&
+            (!dev_ethtool_get_settings(dev, &ecmd))) {
+                lp->link_supported_speeds &=
+                        ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
+                if (ecmd.supported & (SUPPORTED_1000baseT_Half |
+                                      SUPPORTED_1000baseT_Full))
+                        lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
+                if (ecmd.supported & SUPPORTED_10000baseT_Full)
+                        lp->link_supported_speeds |=
+                                FC_PORTSPEED_10GBIT;
+                if (ecmd.speed == SPEED_1000)
+                        lp->link_speed = FC_PORTSPEED_1GBIT;
+                if (ecmd.speed == SPEED_10000)
+                        lp->link_speed = FC_PORTSPEED_10GBIT;
 
-        return rc;
+                return 0;
+        }
+        return -1;
 }
 
 /**
  * fcoe_percpu_clean() - Clear the pending skbs for an lport
  * @lp: the fc_lport
+ *
+ * Must be called with fcoe_create_mutex held to single-thread completion.
+ *
+ * This flushes the pending skbs by adding a new skb to each queue and
+ * waiting until they are all freed.  This assures us that not only are
+ * there no packets that will be handled by the lport, but also that any
+ * threads already handling packet have returned.
  */
 void fcoe_percpu_clean(struct fc_lport *lp)
 {
@@ -1687,7 +1843,25 @@ void fcoe_percpu_clean(struct fc_lport *lp)
                                 kfree_skb(skb);
                         }
                 }
+
+                if (!pp->thread || !cpu_online(cpu)) {
+                        spin_unlock_bh(&pp->fcoe_rx_list.lock);
+                        continue;
+                }
+
+                skb = dev_alloc_skb(0);
+                if (!skb) {
+                        spin_unlock_bh(&pp->fcoe_rx_list.lock);
+                        continue;
+                }
+                skb->destructor = fcoe_percpu_flush_done;
+
+                __skb_queue_tail(&pp->fcoe_rx_list, skb);
+                if (pp->fcoe_rx_list.qlen == 1)
+                        wake_up_process(pp->thread);
                 spin_unlock_bh(&pp->fcoe_rx_list.lock);
+
+                wait_for_completion(&fcoe_flush_completion);
         }
 }
 
@@ -1699,16 +1873,16 @@ void fcoe_percpu_clean(struct fc_lport *lp)
  */
 void fcoe_clean_pending_queue(struct fc_lport *lp)
 {
-        struct fcoe_softc  *fc = lport_priv(lp);
+        struct fcoe_port  *port = lport_priv(lp);
         struct sk_buff *skb;
 
-        spin_lock_bh(&fc->fcoe_pending_queue.lock);
-        while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
-                spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+        spin_lock_bh(&port->fcoe_pending_queue.lock);
+        while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
+                spin_unlock_bh(&port->fcoe_pending_queue.lock);
                 kfree_skb(skb);
-                spin_lock_bh(&fc->fcoe_pending_queue.lock);
+                spin_lock_bh(&port->fcoe_pending_queue.lock);
         }
-        spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+        spin_unlock_bh(&port->fcoe_pending_queue.lock);
 }
 
 /**
@@ -1725,24 +1899,21 @@ int fcoe_reset(struct Scsi_Host *shost)
 }
 
 /**
- * fcoe_hostlist_lookup_softc() - find the corresponding lport by a given device
+ * fcoe_hostlist_lookup_port() - find the corresponding lport by a given device
  * @dev: this is currently ptr to net_device
  *
- * Returns: NULL or the located fcoe_softc
+ * Returns: NULL or the located fcoe_port
+ * Locking: must be called with the RNL mutex held
  */
-static struct fcoe_softc *
-fcoe_hostlist_lookup_softc(const struct net_device *dev)
+static struct fcoe_interface *
+fcoe_hostlist_lookup_port(const struct net_device *dev)
 {
-        struct fcoe_softc *fc;
+        struct fcoe_interface *fcoe;
 
-        read_lock(&fcoe_hostlist_lock);
-        list_for_each_entry(fc, &fcoe_hostlist, list) {
-                if (fc->real_dev == dev) {
-                        read_unlock(&fcoe_hostlist_lock);
-                        return fc;
-                }
+        list_for_each_entry(fcoe, &fcoe_hostlist, list) {
+                if (fcoe->netdev == dev)
+                        return fcoe;
         }
-        read_unlock(&fcoe_hostlist_lock);
         return NULL;
 }
 
@@ -1751,14 +1922,14 @@ fcoe_hostlist_lookup_softc(const struct net_device *dev)
  * @netdev: ptr to net_device
  *
  * Returns: 0 for success
+ * Locking: must be called with the RTNL mutex held
  */
-struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
+static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
 {
-        struct fcoe_softc *fc;
-
-        fc = fcoe_hostlist_lookup_softc(netdev);
+        struct fcoe_interface *fcoe;
 
-        return (fc) ? fc->ctlr.lp : NULL;
+        fcoe = fcoe_hostlist_lookup_port(netdev);
+        return (fcoe) ? fcoe->ctlr.lp : NULL;
 }
 
 /**
@@ -1766,41 +1937,23 @@ struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
  * @lp: ptr to the fc_lport to be added
  *
  * Returns: 0 for success
+ * Locking: must be called with the RTNL mutex held
  */
-int fcoe_hostlist_add(const struct fc_lport *lp)
+static int fcoe_hostlist_add(const struct fc_lport *lport)
 {
-        struct fcoe_softc *fc;
-
-        fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
-        if (!fc) {
-                fc = lport_priv(lp);
-                write_lock_bh(&fcoe_hostlist_lock);
-                list_add_tail(&fc->list, &fcoe_hostlist);
-                write_unlock_bh(&fcoe_hostlist_lock);
+        struct fcoe_interface *fcoe;
+        struct fcoe_port *port;
+
+        fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
+        if (!fcoe) {
+                port = lport_priv(lport);
+                fcoe = port->fcoe;
+                list_add_tail(&fcoe->list, &fcoe_hostlist);
         }
         return 0;
 }
 
 /**
- * fcoe_hostlist_remove() - remove a lport from lports list
- * @lp: ptr to the fc_lport to be removed
- *
- * Returns: 0 for success
- */
-int fcoe_hostlist_remove(const struct fc_lport *lp)
-{
-        struct fcoe_softc *fc;
-
-        fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
-        BUG_ON(!fc);
-        write_lock_bh(&fcoe_hostlist_lock);
-        list_del(&fc->list);
-        write_unlock_bh(&fcoe_hostlist_lock);
-
-        return 0;
-}
-
-/**
  * fcoe_init() - fcoe module loading initialization
  *
  * Returns 0 on success, negative on failure
@@ -1811,8 +1964,7 @@ static int __init fcoe_init(void)
         int rc = 0;
         struct fcoe_percpu_s *p;
 
-        INIT_LIST_HEAD(&fcoe_hostlist);
-        rwlock_init(&fcoe_hostlist_lock);
+        mutex_lock(&fcoe_config_mutex);
 
         for_each_possible_cpu(cpu) {
                 p = &per_cpu(fcoe_percpu, cpu);
@@ -1830,15 +1982,18 @@ static int __init fcoe_init(void)
         /* Setup link change notification */
         fcoe_dev_setup();
 
-        fcoe_if_init();
+        rc = fcoe_if_init();
+        if (rc)
+                goto out_free;
 
+        mutex_unlock(&fcoe_config_mutex);
         return 0;
 
 out_free:
         for_each_online_cpu(cpu) {
                 fcoe_percpu_thread_destroy(cpu);
         }
-
+        mutex_unlock(&fcoe_config_mutex);
         return rc;
 }
 module_init(fcoe_init);
@@ -1851,21 +2006,36 @@ module_init(fcoe_init);
 static void __exit fcoe_exit(void)
 {
         unsigned int cpu;
-        struct fcoe_softc *fc, *tmp;
+        struct fcoe_interface *fcoe, *tmp;
+        struct fcoe_port *port;
+
+        mutex_lock(&fcoe_config_mutex);
 
         fcoe_dev_cleanup();
 
         /* releases the associated fcoe hosts */
-        list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
-                fcoe_if_destroy(fc->real_dev);
+        rtnl_lock();
+        list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
+                list_del(&fcoe->list);
+                port = lport_priv(fcoe->ctlr.lp);
+                fcoe_interface_cleanup(fcoe);
+                schedule_work(&port->destroy_work);
+        }
+        rtnl_unlock();
 
         unregister_hotcpu_notifier(&fcoe_cpu_notifier);
 
-        for_each_online_cpu(cpu) {
+        for_each_online_cpu(cpu)
                 fcoe_percpu_thread_destroy(cpu);
-        }
 
-        /* detach from scsi transport */
+        mutex_unlock(&fcoe_config_mutex);
+
+        /* flush any asyncronous interface destroys,
+         * this should happen after the netdev notifier is unregistered */
+        flush_scheduled_work();
+
+        /* detach from scsi transport
+         * must happen after all destroys are done, therefor after the flush */
         fcoe_if_exit();
 }
 module_exit(fcoe_exit);
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
index 0d724fa0898f..ce7f60fb1bc0 100644
--- a/drivers/scsi/fcoe/fcoe.h
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -37,8 +37,8 @@
 
 #define FCOE_MAX_OUTSTANDING_COMMANDS   1024
 
-#define FCOE_MIN_XID            0x0001  /* the min xid supported by fcoe_sw */
-#define FCOE_MAX_XID            0x07ef  /* the max xid supported by fcoe_sw */
+#define FCOE_MIN_XID            0x0000  /* the min xid supported by fcoe_sw */
+#define FCOE_MAX_XID            0x0FFF  /* the max xid supported by fcoe_sw */
 
 unsigned int fcoe_debug_logging;
 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
@@ -53,7 +53,7 @@ do {                                                            	\
                 do {                                                    \
                         CMD;                                            \
                 } while (0);                                            \
-} while (0);
+} while (0)
 
 #define FCOE_DBG(fmt, args...)                                          \
         FCOE_CHECK_LOGGING(FCOE_LOGGING,                                \
@@ -61,7 +61,7 @@ do {                                                            	\
 
 #define FCOE_NETDEV_DBG(netdev, fmt, args...)                   \
         FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING,                 \
-                           printk(KERN_INFO "fcoe: %s" fmt,     \
+                           printk(KERN_INFO "fcoe: %s: " fmt,   \
                                   netdev->name, ##args);)
 
 /*
@@ -75,26 +75,36 @@ struct fcoe_percpu_s {
 };
 
 /*
- * the fcoe sw transport private data
+ * an FCoE interface, 1:1 with netdev
  */
-struct fcoe_softc {
+struct fcoe_interface {
         struct list_head list;
-        struct net_device *real_dev;
-        struct net_device *phys_dev;            /* device with ethtool_ops */
+        struct net_device *netdev;
         struct packet_type  fcoe_packet_type;
         struct packet_type  fip_packet_type;
+        struct fcoe_ctlr ctlr;
+        struct fc_exch_mgr *oem;                /* offload exchange manager */
+        struct kref kref;
+};
+
+/*
+ * the FCoE private structure that's allocated along with the
+ * Scsi_Host and libfc fc_lport structures
+ */
+struct fcoe_port {
+        struct fcoe_interface *fcoe;
+        struct fc_lport *lport;
         struct sk_buff_head fcoe_pending_queue;
         u8      fcoe_pending_queue_active;
         struct timer_list timer;                /* queue timer */
-        struct fcoe_ctlr ctlr;
+        struct work_struct destroy_work;        /* to prevent rtnl deadlocks */
 };
 
-#define fcoe_from_ctlr(fc) container_of(fc, struct fcoe_softc, ctlr)
+#define fcoe_from_ctlr(fip) container_of(fip, struct fcoe_interface, ctlr)
 
-static inline struct net_device *fcoe_netdev(
-        const struct fc_lport *lp)
+static inline struct net_device *fcoe_netdev(const struct fc_lport *lp)
 {
-        return ((struct fcoe_softc *)lport_priv(lp))->real_dev;
+        return ((struct fcoe_port *)lport_priv(lp))->fcoe->netdev;
 }
 
 #endif /* _FCOE_H_ */
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index f544340d318b..62a4c2026072 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -69,7 +69,7 @@ do {                                                            	\
                 do {                                                    \
                         CMD;                                            \
                 } while (0);                                            \
-} while (0);
+} while (0)
 
 #define LIBFCOE_DBG(fmt, args...)                                       \
         LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING,                          \
@@ -148,13 +148,17 @@ static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
  */
 void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
 {
-        flush_work(&fip->recv_work);
+        cancel_work_sync(&fip->recv_work);
+        spin_lock_bh(&fip->fip_recv_list.lock);
+        __skb_queue_purge(&fip->fip_recv_list);
+        spin_unlock_bh(&fip->fip_recv_list.lock);
+
         spin_lock_bh(&fip->lock);
         fip->state = FIP_ST_DISABLED;
         fcoe_ctlr_reset_fcfs(fip);
         spin_unlock_bh(&fip->lock);
         del_timer_sync(&fip->timer);
-        flush_work(&fip->link_work);
+        cancel_work_sync(&fip->link_work);
 }
 EXPORT_SYMBOL(fcoe_ctlr_destroy);
 
@@ -413,10 +417,18 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
         struct fip_mac_desc *mac;
         struct fcoe_fcf *fcf;
         size_t dlen;
+        u16 fip_flags;
 
         fcf = fip->sel_fcf;
         if (!fcf)
                 return -ENODEV;
+
+        /* set flags according to both FCF and lport's capability on SPMA */
+        fip_flags = fcf->flags;
+        fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA;
+        if (!fip_flags)
+                return -ENODEV;
+
         dlen = sizeof(struct fip_encaps) + skb->len;    /* len before push */
         cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
 
@@ -429,9 +441,7 @@ static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
         cap->fip.fip_op = htons(FIP_OP_LS);
         cap->fip.fip_subcode = FIP_SC_REQ;
         cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW);
-        cap->fip.fip_flags = htons(FIP_FL_FPMA);
-        if (fip->spma)
-                cap->fip.fip_flags |= htons(FIP_FL_SPMA);
+        cap->fip.fip_flags = htons(fip_flags);
 
         cap->encaps.fd_desc.fip_dtype = dtype;
         cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
@@ -879,7 +889,7 @@ static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
         stats->RxFrames++;
         stats->RxWords += skb->len / FIP_BPW;
 
-        fc_exch_recv(lp, lp->emp, fp);
+        fc_exch_recv(lp, fp);
         return;
 
 len_err:
@@ -1104,7 +1114,6 @@ static void fcoe_ctlr_timeout(unsigned long arg)
         struct fcoe_fcf *sel;
         struct fcoe_fcf *fcf;
         unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
-        DECLARE_MAC_BUF(buf);
         u8 send_ctlr_ka;
         u8 send_port_ka;
 
@@ -1128,9 +1137,8 @@ static void fcoe_ctlr_timeout(unsigned long arg)
                 fcf = sel;              /* the old FCF may have been freed */
                 if (sel) {
                         printk(KERN_INFO "libfcoe: host%d: FIP selected "
-                               "Fibre-Channel Forwarder MAC %s\n",
-                               fip->lp->host->host_no,
-                               print_mac(buf, sel->fcf_mac));
+                               "Fibre-Channel Forwarder MAC %pM\n",
+                               fip->lp->host->host_no, sel->fcf_mac);
                         memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
                         fip->port_ka_time = jiffies +
                                             msecs_to_jiffies(FIP_VN_KA_PERIOD);
diff --git a/drivers/scsi/fnic/fnic_fcs.c b/drivers/scsi/fnic/fnic_fcs.c
index 07e6eedb83ce..50db3e36a619 100644
--- a/drivers/scsi/fnic/fnic_fcs.c
+++ b/drivers/scsi/fnic/fnic_fcs.c
@@ -115,7 +115,7 @@ void fnic_handle_frame(struct work_struct *work)
                 }
                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 
-                fc_exch_recv(lp, lp->emp, fp);
+                fc_exch_recv(lp, fp);
         }
 
 }
diff --git a/drivers/scsi/fnic/fnic_main.c b/drivers/scsi/fnic/fnic_main.c
index 2c266c01dc5a..71c7bbe26d05 100644
--- a/drivers/scsi/fnic/fnic_main.c
+++ b/drivers/scsi/fnic/fnic_main.c
@@ -671,14 +671,6 @@ static int __devinit fnic_probe(struct pci_dev *pdev,
         lp->link_up = 0;
         lp->tt = fnic_transport_template;
 
-        lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
-                                    FCPIO_HOST_EXCH_RANGE_START,
-                                    FCPIO_HOST_EXCH_RANGE_END);
-        if (!lp->emp) {
-                err = -ENOMEM;
-                goto err_out_remove_scsi_host;
-        }
-
         lp->max_retry_count = fnic->config.flogi_retries;
         lp->max_rport_retry_count = fnic->config.plogi_retries;
         lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
@@ -693,12 +685,18 @@ static int __devinit fnic_probe(struct pci_dev *pdev,
         fc_set_wwnn(lp, fnic->config.node_wwn);
         fc_set_wwpn(lp, fnic->config.port_wwn);
 
-        fc_exch_init(lp);
         fc_lport_init(lp);
+        fc_exch_init(lp);
         fc_elsct_init(lp);
         fc_rport_init(lp);
         fc_disc_init(lp);
 
+        if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
+                               FCPIO_HOST_EXCH_RANGE_END, NULL)) {
+                err = -ENOMEM;
+                goto err_out_remove_scsi_host;
+        }
+
         fc_lport_config(lp);
 
         if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
@@ -738,7 +736,7 @@ static int __devinit fnic_probe(struct pci_dev *pdev,
         return 0;
 
 err_out_free_exch_mgr:
-        fc_exch_mgr_free(lp->emp);
+        fc_exch_mgr_free(lp);
 err_out_remove_scsi_host:
         fc_remove_host(fnic->lport->host);
         scsi_remove_host(fnic->lport->host);
@@ -827,7 +825,7 @@ static void __devexit fnic_remove(struct pci_dev *pdev)
 
         fc_remove_host(fnic->lport->host);
         scsi_remove_host(fnic->lport->host);
-        fc_exch_mgr_free(fnic->lport->emp);
+        fc_exch_mgr_free(fnic->lport);
         vnic_dev_notify_unset(fnic->vdev);
         fnic_free_vnic_resources(fnic);
         fnic_free_intr(fnic);
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 166d96450a0e..bb2c696c006a 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c
@@ -4217,7 +4217,7 @@ static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost)
         if (!vhost->trace)
                 goto free_disc_buffer;
 
-        vhost->tgt_pool = mempool_create_kzalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
+        vhost->tgt_pool = mempool_create_kmalloc_pool(IBMVFC_TGT_MEMPOOL_SZ,
                                                       sizeof(struct ibmvfc_target));
 
         if (!vhost->tgt_pool) {
diff --git a/drivers/scsi/ipr.h b/drivers/scsi/ipr.h
index 4b63dd6b1c81..163245a1c3e5 100644
--- a/drivers/scsi/ipr.h
+++ b/drivers/scsi/ipr.h
@@ -1199,7 +1199,7 @@ struct ipr_ioa_cfg {
 
         struct ata_host ata_host;
         char ipr_cmd_label[8];
-#define IPR_CMD_LABEL           "ipr_cmnd"
+#define IPR_CMD_LABEL           "ipr_cmd"
         struct ipr_cmnd *ipr_cmnd_list[IPR_NUM_CMD_BLKS];
         u32 ipr_cmnd_list_dma[IPR_NUM_CMD_BLKS];
 };
diff --git a/drivers/scsi/iscsi_tcp.c b/drivers/scsi/iscsi_tcp.c
index 518dbd91df85..2b1b834a098b 100644
--- a/drivers/scsi/iscsi_tcp.c
+++ b/drivers/scsi/iscsi_tcp.c
@@ -99,6 +99,27 @@ static int iscsi_sw_tcp_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
         return total_consumed;
 }
 
+/**
+ * iscsi_sw_sk_state_check - check socket state
+ * @sk: socket
+ *
+ * If the socket is in CLOSE or CLOSE_WAIT we should
+ * not close the connection if there is still some
+ * data pending.
+ */
+static inline int iscsi_sw_sk_state_check(struct sock *sk)
+{
+        struct iscsi_conn *conn = (struct iscsi_conn*)sk->sk_user_data;
+
+        if ((sk->sk_state == TCP_CLOSE_WAIT || sk->sk_state == TCP_CLOSE) &&
+            !atomic_read(&sk->sk_rmem_alloc)) {
+                ISCSI_SW_TCP_DBG(conn, "TCP_CLOSE|TCP_CLOSE_WAIT\n");
+                iscsi_conn_failure(conn, ISCSI_ERR_TCP_CONN_CLOSE);
+                return -ECONNRESET;
+        }
+        return 0;
+}
+
 static void iscsi_sw_tcp_data_ready(struct sock *sk, int flag)
 {
         struct iscsi_conn *conn = sk->sk_user_data;
@@ -117,6 +138,8 @@ static void iscsi_sw_tcp_data_ready(struct sock *sk, int flag)
         rd_desc.count = 1;
         tcp_read_sock(sk, &rd_desc, iscsi_sw_tcp_recv);
 
+        iscsi_sw_sk_state_check(sk);
+
         read_unlock(&sk->sk_callback_lock);
 
         /* If we had to (atomically) map a highmem page,
@@ -137,13 +160,7 @@ static void iscsi_sw_tcp_state_change(struct sock *sk)
         conn = (struct iscsi_conn*)sk->sk_user_data;
         session = conn->session;
 
-        if ((sk->sk_state == TCP_CLOSE_WAIT ||
-             sk->sk_state == TCP_CLOSE) &&
-            !atomic_read(&sk->sk_rmem_alloc)) {
-                ISCSI_SW_TCP_DBG(conn, "iscsi_tcp_state_change: "
-                                 "TCP_CLOSE|TCP_CLOSE_WAIT\n");
-                iscsi_conn_failure(conn, ISCSI_ERR_CONN_FAILED);
-        }
+        iscsi_sw_sk_state_check(sk);
 
         tcp_conn = conn->dd_data;
         tcp_sw_conn = tcp_conn->dd_data;
diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index 6fabf66972b9..c48799e9dd8e 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -43,47 +43,14 @@
 #define FC_DISC_RETRY_LIMIT     3       /* max retries */
 #define FC_DISC_RETRY_DELAY     500UL   /* (msecs) delay */
 
-#define FC_DISC_DELAY           3
-
 static void fc_disc_gpn_ft_req(struct fc_disc *);
 static void fc_disc_gpn_ft_resp(struct fc_seq *, struct fc_frame *, void *);
-static int fc_disc_new_target(struct fc_disc *, struct fc_rport *,
-                              struct fc_rport_identifiers *);
-static void fc_disc_del_target(struct fc_disc *, struct fc_rport *);
-static void fc_disc_done(struct fc_disc *);
+static void fc_disc_done(struct fc_disc *, enum fc_disc_event);
 static void fc_disc_timeout(struct work_struct *);
-static void fc_disc_single(struct fc_disc *, struct fc_disc_port *);
+static int fc_disc_single(struct fc_lport *, struct fc_disc_port *);
 static void fc_disc_restart(struct fc_disc *);
 
 /**
- * fc_disc_lookup_rport() - lookup a remote port by port_id
- * @lport: Fibre Channel host port instance
- * @port_id: remote port port_id to match
- */
-struct fc_rport *fc_disc_lookup_rport(const struct fc_lport *lport,
-                                      u32 port_id)
-{
-        const struct fc_disc *disc = &lport->disc;
-        struct fc_rport *rport, *found = NULL;
-        struct fc_rport_libfc_priv *rdata;
-        int disc_found = 0;
-
-        list_for_each_entry(rdata, &disc->rports, peers) {
-                rport = PRIV_TO_RPORT(rdata);
-                if (rport->port_id == port_id) {
-                        disc_found = 1;
-                        found = rport;
-                        break;
-                }
-        }
-
-        if (!disc_found)
-                found = NULL;
-
-        return found;
-}
-
-/**
  * fc_disc_stop_rports() - delete all the remote ports associated with the lport
  * @disc: The discovery job to stop rports on
  *
@@ -93,70 +60,17 @@ struct fc_rport *fc_disc_lookup_rport(const struct fc_lport *lport,
 void fc_disc_stop_rports(struct fc_disc *disc)
 {
         struct fc_lport *lport;
-        struct fc_rport *rport;
-        struct fc_rport_libfc_priv *rdata, *next;
+        struct fc_rport_priv *rdata, *next;
 
         lport = disc->lport;
 
         mutex_lock(&disc->disc_mutex);
-        list_for_each_entry_safe(rdata, next, &disc->rports, peers) {
-                rport = PRIV_TO_RPORT(rdata);
-                list_del(&rdata->peers);
-                lport->tt.rport_logoff(rport);
-        }
-
-        list_for_each_entry_safe(rdata, next, &disc->rogue_rports, peers) {
-                rport = PRIV_TO_RPORT(rdata);
-                lport->tt.rport_logoff(rport);
-        }
-
+        list_for_each_entry_safe(rdata, next, &disc->rports, peers)
+                lport->tt.rport_logoff(rdata);
         mutex_unlock(&disc->disc_mutex);
 }
 
 /**
- * fc_disc_rport_callback() - Event handler for rport events
- * @lport: The lport which is receiving the event
- * @rport: The rport which the event has occured on
- * @event: The event that occured
- *
- * Locking Note: The rport lock should not be held when calling
- *               this function.
- */
-static void fc_disc_rport_callback(struct fc_lport *lport,
-                                   struct fc_rport *rport,
-                                   enum fc_rport_event event)
-{
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-        struct fc_disc *disc = &lport->disc;
-
-        FC_DISC_DBG(disc, "Received a %d event for port (%6x)\n", event,
-                    rport->port_id);
-
-        switch (event) {
-        case RPORT_EV_CREATED:
-                if (disc) {
-                        mutex_lock(&disc->disc_mutex);
-                        list_add_tail(&rdata->peers, &disc->rports);
-                        mutex_unlock(&disc->disc_mutex);
-                }
-                break;
-        case RPORT_EV_LOGO:
-        case RPORT_EV_FAILED:
-        case RPORT_EV_STOP:
-                mutex_lock(&disc->disc_mutex);
-                mutex_lock(&rdata->rp_mutex);
-                if (rdata->trans_state == FC_PORTSTATE_ROGUE)
-                        list_del(&rdata->peers);
-                mutex_unlock(&rdata->rp_mutex);
-                mutex_unlock(&disc->disc_mutex);
-                break;
-        default:
-                break;
-        }
-
-}
-
-/**
  * fc_disc_recv_rscn_req() - Handle Registered State Change Notification (RSCN)
  * @sp: Current sequence of the RSCN exchange
  * @fp: RSCN Frame
@@ -169,8 +83,6 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
                                   struct fc_disc *disc)
 {
         struct fc_lport *lport;
-        struct fc_rport *rport;
-        struct fc_rport_libfc_priv *rdata;
         struct fc_els_rscn *rp;
         struct fc_els_rscn_page *pp;
         struct fc_seq_els_data rjt_data;
@@ -224,10 +136,7 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
                                 break;
                         }
                         dp->lp = lport;
-                        dp->ids.port_id = ntoh24(pp->rscn_fid);
-                        dp->ids.port_name = -1;
-                        dp->ids.node_name = -1;
-                        dp->ids.roles = FC_RPORT_ROLE_UNKNOWN;
+                        dp->port_id = ntoh24(pp->rscn_fid);
                         list_add_tail(&dp->peers, &disc_ports);
                         break;
                 case ELS_ADDR_FMT_AREA:
@@ -240,6 +149,19 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
                 }
         }
         lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
+
+        /*
+         * If not doing a complete rediscovery, do GPN_ID on
+         * the individual ports mentioned in the list.
+         * If any of these get an error, do a full rediscovery.
+         * In any case, go through the list and free the entries.
+         */
+        list_for_each_entry_safe(dp, next, &disc_ports, peers) {
+                list_del(&dp->peers);
+                if (!redisc)
+                        redisc = fc_disc_single(lport, dp);
+                kfree(dp);
+        }
         if (redisc) {
                 FC_DISC_DBG(disc, "RSCN received: rediscovering\n");
                 fc_disc_restart(disc);
@@ -247,16 +169,6 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
                 FC_DISC_DBG(disc, "RSCN received: not rediscovering. "
                             "redisc %d state %d in_prog %d\n",
                             redisc, lport->state, disc->pending);
-                list_for_each_entry_safe(dp, next, &disc_ports, peers) {
-                        list_del(&dp->peers);
-                        rport = lport->tt.rport_lookup(lport, dp->ids.port_id);
-                        if (rport) {
-                                rdata = rport->dd_data;
-                                list_del(&rdata->peers);
-                                lport->tt.rport_logoff(rport);
-                        }
-                        fc_disc_single(disc, dp);
-                }
         }
         fc_frame_free(fp);
         return;
@@ -308,35 +220,34 @@ static void fc_disc_recv_req(struct fc_seq *sp, struct fc_frame *fp,
  */
 static void fc_disc_restart(struct fc_disc *disc)
 {
-        struct fc_rport *rport;
-        struct fc_rport_libfc_priv *rdata, *next;
-        struct fc_lport *lport = disc->lport;
+        if (!disc->disc_callback)
+                return;
 
         FC_DISC_DBG(disc, "Restarting discovery\n");
 
-        list_for_each_entry_safe(rdata, next, &disc->rports, peers) {
-                rport = PRIV_TO_RPORT(rdata);
-                list_del(&rdata->peers);
-                lport->tt.rport_logoff(rport);
-        }
-
         disc->requested = 1;
-        if (!disc->pending)
-                fc_disc_gpn_ft_req(disc);
+        if (disc->pending)
+                return;
+
+        /*
+         * Advance disc_id.  This is an arbitrary non-zero number that will
+         * match the value in the fc_rport_priv after discovery for all
+         * freshly-discovered remote ports.  Avoid wrapping to zero.
+         */
+        disc->disc_id = (disc->disc_id + 2) | 1;
+        disc->retry_count = 0;
+        fc_disc_gpn_ft_req(disc);
 }
 
 /**
  * fc_disc_start() - Fibre Channel Target discovery
  * @lport: FC local port
- *
- * Returns non-zero if discovery cannot be started.
+ * @disc_callback: function to be called when discovery is complete
  */
 static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
                                                 enum fc_disc_event),
                           struct fc_lport *lport)
 {
-        struct fc_rport *rport;
-        struct fc_rport_identifiers ids;
         struct fc_disc *disc = &lport->disc;
 
         /*
@@ -345,145 +256,47 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
          * and send the GPN_FT request.
          */
         mutex_lock(&disc->disc_mutex);
-
         disc->disc_callback = disc_callback;
-
-        /*
-         * If not ready, or already running discovery, just set request flag.
-         */
-        disc->requested = 1;
-
-        if (disc->pending) {
-                mutex_unlock(&disc->disc_mutex);
-                return;
-        }
-
-        /*
-         * Handle point-to-point mode as a simple discovery
-         * of the remote port. Yucky, yucky, yuck, yuck!
-         */
-        rport = disc->lport->ptp_rp;
-        if (rport) {
-                ids.port_id = rport->port_id;
-                ids.port_name = rport->port_name;
-                ids.node_name = rport->node_name;
-                ids.roles = FC_RPORT_ROLE_UNKNOWN;
-                get_device(&rport->dev);
-
-                if (!fc_disc_new_target(disc, rport, &ids)) {
-                        disc->event = DISC_EV_SUCCESS;
-                        fc_disc_done(disc);
-                }
-                put_device(&rport->dev);
-        } else {
-                fc_disc_gpn_ft_req(disc);       /* get ports by FC-4 type */
-        }
-
+        fc_disc_restart(disc);
         mutex_unlock(&disc->disc_mutex);
 }
 
-static struct fc_rport_operations fc_disc_rport_ops = {
-        .event_callback = fc_disc_rport_callback,
-};
-
-/**
- * fc_disc_new_target() - Handle new target found by discovery
- * @lport: FC local port
- * @rport: The previous FC remote port (NULL if new remote port)
- * @ids: Identifiers for the new FC remote port
- *
- * Locking Note: This function expects that the disc_mutex is locked
- *               before it is called.
- */
-static int fc_disc_new_target(struct fc_disc *disc,
-                              struct fc_rport *rport,
-                              struct fc_rport_identifiers *ids)
-{
-        struct fc_lport *lport = disc->lport;
-        struct fc_rport_libfc_priv *rdata;
-        int error = 0;
-
-        if (rport && ids->port_name) {
-                if (rport->port_name == -1) {
-                        /*
-                         * Set WWN and fall through to notify of create.
-                         */
-                        fc_rport_set_name(rport, ids->port_name,
-                                          rport->node_name);
-                } else if (rport->port_name != ids->port_name) {
-                        /*
-                         * This is a new port with the same FCID as
-                         * a previously-discovered port.  Presumably the old
-                         * port logged out and a new port logged in and was
-                         * assigned the same FCID.  This should be rare.
-                         * Delete the old one and fall thru to re-create.
-                         */
-                        fc_disc_del_target(disc, rport);
-                        rport = NULL;
-                }
-        }
-        if (((ids->port_name != -1) || (ids->port_id != -1)) &&
-            ids->port_id != fc_host_port_id(lport->host) &&
-            ids->port_name != lport->wwpn) {
-                if (!rport) {
-                        rport = lport->tt.rport_lookup(lport, ids->port_id);
-                        if (!rport) {
-                                struct fc_disc_port dp;
-                                dp.lp = lport;
-                                dp.ids.port_id = ids->port_id;
-                                dp.ids.port_name = ids->port_name;
-                                dp.ids.node_name = ids->node_name;
-                                dp.ids.roles = ids->roles;
-                                rport = lport->tt.rport_create(&dp);
-                        }
-                        if (!rport)
-                                error = -ENOMEM;
-                }
-                if (rport) {
-                        rdata = rport->dd_data;
-                        rdata->ops = &fc_disc_rport_ops;
-                        rdata->rp_state = RPORT_ST_INIT;
-                        list_add_tail(&rdata->peers, &disc->rogue_rports);
-                        lport->tt.rport_login(rport);
-                }
-        }
-        return error;
-}
-
-/**
- * fc_disc_del_target() - Delete a target
- * @disc: FC discovery context
- * @rport: The remote port to be removed
- */
-static void fc_disc_del_target(struct fc_disc *disc, struct fc_rport *rport)
-{
-        struct fc_lport *lport = disc->lport;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-        list_del(&rdata->peers);
-        lport->tt.rport_logoff(rport);
-}
-
 /**
  * fc_disc_done() - Discovery has been completed
  * @disc: FC discovery context
+ * @event: discovery completion status
+ *
  * Locking Note: This function expects that the disc mutex is locked before
  * it is called. The discovery callback is then made with the lock released,
  * and the lock is re-taken before returning from this function
  */
-static void fc_disc_done(struct fc_disc *disc)
+static void fc_disc_done(struct fc_disc *disc, enum fc_disc_event event)
 {
         struct fc_lport *lport = disc->lport;
-        enum fc_disc_event event;
+        struct fc_rport_priv *rdata;
 
         FC_DISC_DBG(disc, "Discovery complete\n");
 
-        event = disc->event;
-        disc->event = DISC_EV_NONE;
+        disc->pending = 0;
+        if (disc->requested) {
+                fc_disc_restart(disc);
+                return;
+        }
 
-        if (disc->requested)
-                fc_disc_gpn_ft_req(disc);
-        else
-                disc->pending = 0;
+        /*
+         * Go through all remote ports.  If they were found in the latest
+         * discovery, reverify or log them in.  Otherwise, log them out.
+         * Skip ports which were never discovered.  These are the dNS port
+         * and ports which were created by PLOGI.
+         */
+        list_for_each_entry(rdata, &disc->rports, peers) {
+                if (!rdata->disc_id)
+                        continue;
+                if (rdata->disc_id == disc->disc_id)
+                        lport->tt.rport_login(rdata);
+                else
+                        lport->tt.rport_logoff(rdata);
+        }
 
         mutex_unlock(&disc->disc_mutex);
         disc->disc_callback(lport, event);
@@ -522,11 +335,8 @@ static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
                         }
                         disc->retry_count++;
                         schedule_delayed_work(&disc->disc_work, delay);
-                } else {
-                        /* exceeded retries */
-                        disc->event = DISC_EV_FAILED;
-                        fc_disc_done(disc);
-                }
+                } else
+                        fc_disc_done(disc, DISC_EV_FAILED);
         }
 }
 
@@ -555,7 +365,7 @@ static void fc_disc_gpn_ft_req(struct fc_disc *disc)
         if (!fp)
                 goto err;
 
-        if (lport->tt.elsct_send(lport, NULL, fp,
+        if (lport->tt.elsct_send(lport, 0, fp,
                                  FC_NS_GPN_FT,
                                  fc_disc_gpn_ft_resp,
                                  disc, lport->e_d_tov))
@@ -565,10 +375,12 @@ err:
 }
 
 /**
- * fc_disc_gpn_ft_parse() - Parse the list of IDs and names resulting from a request
+ * fc_disc_gpn_ft_parse() - Parse the body of the dNS GPN_FT response.
  * @lport: Fibre Channel host port instance
  * @buf: GPN_FT response buffer
  * @len: size of response buffer
+ *
+ * Goes through the list of IDs and names resulting from a request.
  */
 static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
 {
@@ -578,11 +390,11 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
         size_t plen;
         size_t tlen;
         int error = 0;
-        struct fc_disc_port dp;
-        struct fc_rport *rport;
-        struct fc_rport_libfc_priv *rdata;
+        struct fc_rport_identifiers ids;
+        struct fc_rport_priv *rdata;
 
         lport = disc->lport;
+        disc->seq_count++;
 
         /*
          * Handle partial name record left over from previous call.
@@ -591,6 +403,7 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
         plen = len;
         np = (struct fc_gpn_ft_resp *)bp;
         tlen = disc->buf_len;
+        disc->buf_len = 0;
         if (tlen) {
                 WARN_ON(tlen >= sizeof(*np));
                 plen = sizeof(*np) - tlen;
@@ -621,31 +434,25 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
          * After the first time through the loop, things return to "normal".
          */
         while (plen >= sizeof(*np)) {
-                dp.lp = lport;
-                dp.ids.port_id = ntoh24(np->fp_fid);
-                dp.ids.port_name = ntohll(np->fp_wwpn);
-                dp.ids.node_name = -1;
-                dp.ids.roles = FC_RPORT_ROLE_UNKNOWN;
-
-                if ((dp.ids.port_id != fc_host_port_id(lport->host)) &&
-                    (dp.ids.port_name != lport->wwpn)) {
-                        rport = lport->tt.rport_create(&dp);
-                        if (rport) {
-                                rdata = rport->dd_data;
-                                rdata->ops = &fc_disc_rport_ops;
-                                rdata->local_port = lport;
-                                list_add_tail(&rdata->peers,
-                                              &disc->rogue_rports);
-                                lport->tt.rport_login(rport);
-                        } else
+                ids.port_id = ntoh24(np->fp_fid);
+                ids.port_name = ntohll(np->fp_wwpn);
+
+                if (ids.port_id != fc_host_port_id(lport->host) &&
+                    ids.port_name != lport->wwpn) {
+                        rdata = lport->tt.rport_create(lport, ids.port_id);
+                        if (rdata) {
+                                rdata->ids.port_name = ids.port_name;
+                                rdata->disc_id = disc->disc_id;
+                        } else {
                                 printk(KERN_WARNING "libfc: Failed to allocate "
                                        "memory for the newly discovered port "
-                                       "(%6x)\n", dp.ids.port_id);
+                                       "(%6x)\n", ids.port_id);
+                                error = -ENOMEM;
+                        }
                 }
 
                 if (np->fp_flags & FC_NS_FID_LAST) {
-                        disc->event = DISC_EV_SUCCESS;
-                        fc_disc_done(disc);
+                        fc_disc_done(disc, DISC_EV_SUCCESS);
                         len = 0;
                         break;
                 }
@@ -665,8 +472,6 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
                         memcpy(&disc->partial_buf, np, len);
                 }
                 disc->buf_len = (unsigned char) len;
-        } else {
-                disc->buf_len = 0;
         }
         return error;
 }
@@ -683,8 +488,7 @@ static void fc_disc_timeout(struct work_struct *work)
                                             struct fc_disc,
                                             disc_work.work);
         mutex_lock(&disc->disc_mutex);
-        if (disc->requested && !disc->pending)
-                fc_disc_gpn_ft_req(disc);
+        fc_disc_gpn_ft_req(disc);
         mutex_unlock(&disc->disc_mutex);
 }
 
@@ -703,10 +507,10 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
         struct fc_disc *disc = disc_arg;
         struct fc_ct_hdr *cp;
         struct fc_frame_header *fh;
+        enum fc_disc_event event = DISC_EV_NONE;
         unsigned int seq_cnt;
-        void *buf = NULL;
         unsigned int len;
-        int error;
+        int error = 0;
 
         mutex_lock(&disc->disc_mutex);
         FC_DISC_DBG(disc, "Received a GPN_FT response\n");
@@ -721,77 +525,158 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
         fh = fc_frame_header_get(fp);
         len = fr_len(fp) - sizeof(*fh);
         seq_cnt = ntohs(fh->fh_seq_cnt);
-        if (fr_sof(fp) == FC_SOF_I3 && seq_cnt == 0 &&
-            disc->seq_count == 0) {
+        if (fr_sof(fp) == FC_SOF_I3 && seq_cnt == 0 && disc->seq_count == 0) {
                 cp = fc_frame_payload_get(fp, sizeof(*cp));
                 if (!cp) {
                         FC_DISC_DBG(disc, "GPN_FT response too short, len %d\n",
                                     fr_len(fp));
+                        event = DISC_EV_FAILED;
                 } else if (ntohs(cp->ct_cmd) == FC_FS_ACC) {
 
                         /* Accepted, parse the response. */
-                        buf = cp + 1;
                         len -= sizeof(*cp);
+                        error = fc_disc_gpn_ft_parse(disc, cp + 1, len);
                 } else if (ntohs(cp->ct_cmd) == FC_FS_RJT) {
                         FC_DISC_DBG(disc, "GPN_FT rejected reason %x exp %x "
                                     "(check zoning)\n", cp->ct_reason,
                                     cp->ct_explan);
-                        disc->event = DISC_EV_FAILED;
-                        fc_disc_done(disc);
+                        event = DISC_EV_FAILED;
+                        if (cp->ct_reason == FC_FS_RJT_UNABL &&
+                            cp->ct_explan == FC_FS_EXP_FTNR)
+                                event = DISC_EV_SUCCESS;
                 } else {
                         FC_DISC_DBG(disc, "GPN_FT unexpected response code "
                                     "%x\n", ntohs(cp->ct_cmd));
+                        event = DISC_EV_FAILED;
                 }
-        } else if (fr_sof(fp) == FC_SOF_N3 &&
-                   seq_cnt == disc->seq_count) {
-                buf = fh + 1;
+        } else if (fr_sof(fp) == FC_SOF_N3 && seq_cnt == disc->seq_count) {
+                error = fc_disc_gpn_ft_parse(disc, fh + 1, len);
         } else {
                 FC_DISC_DBG(disc, "GPN_FT unexpected frame - out of sequence? "
                             "seq_cnt %x expected %x sof %x eof %x\n",
                             seq_cnt, disc->seq_count, fr_sof(fp), fr_eof(fp));
+                event = DISC_EV_FAILED;
         }
-        if (buf) {
-                error = fc_disc_gpn_ft_parse(disc, buf, len);
-                if (error)
-                        fc_disc_error(disc, fp);
-                else
-                        disc->seq_count++;
-        }
+        if (error)
+                fc_disc_error(disc, fp);
+        else if (event != DISC_EV_NONE)
+                fc_disc_done(disc, event);
         fc_frame_free(fp);
-
         mutex_unlock(&disc->disc_mutex);
 }
 
 /**
- * fc_disc_single() - Discover the directory information for a single target
- * @lport: FC local port
- * @dp: The port to rediscover
+ * fc_disc_gpn_id_resp() - Handle a response frame from Get Port Names (GPN_ID)
+ * @sp: exchange sequence
+ * @fp: response frame
+ * @rdata_arg: remote port private data
  *
- * Locking Note: This function expects that the disc_mutex is locked
- *               before it is called.
+ * Locking Note: This function is called without disc mutex held.
  */
-static void fc_disc_single(struct fc_disc *disc, struct fc_disc_port *dp)
+static void fc_disc_gpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
+                                void *rdata_arg)
 {
+        struct fc_rport_priv *rdata = rdata_arg;
+        struct fc_rport_priv *new_rdata;
         struct fc_lport *lport;
-        struct fc_rport *new_rport;
-        struct fc_rport_libfc_priv *rdata;
+        struct fc_disc *disc;
+        struct fc_ct_hdr *cp;
+        struct fc_ns_gid_pn *pn;
+        u64 port_name;
 
-        lport = disc->lport;
+        lport = rdata->local_port;
+        disc = &lport->disc;
 
-        if (dp->ids.port_id == fc_host_port_id(lport->host))
+        mutex_lock(&disc->disc_mutex);
+        if (PTR_ERR(fp) == -FC_EX_CLOSED)
                 goto out;
-
-        new_rport = lport->tt.rport_create(dp);
-        if (new_rport) {
-                rdata = new_rport->dd_data;
-                rdata->ops = &fc_disc_rport_ops;
-                kfree(dp);
-                list_add_tail(&rdata->peers, &disc->rogue_rports);
-                lport->tt.rport_login(new_rport);
+        if (IS_ERR(fp))
+                goto redisc;
+
+        cp = fc_frame_payload_get(fp, sizeof(*cp));
+        if (!cp)
+                goto redisc;
+        if (ntohs(cp->ct_cmd) == FC_FS_ACC) {
+                if (fr_len(fp) < sizeof(struct fc_frame_header) +
+                    sizeof(*cp) + sizeof(*pn))
+                        goto redisc;
+                pn = (struct fc_ns_gid_pn *)(cp + 1);
+                port_name = get_unaligned_be64(&pn->fn_wwpn);
+                if (rdata->ids.port_name == -1)
+                        rdata->ids.port_name = port_name;
+                else if (rdata->ids.port_name != port_name) {
+                        FC_DISC_DBG(disc, "GPN_ID accepted.  WWPN changed. "
+                                    "Port-id %x wwpn %llx\n",
+                                    rdata->ids.port_id, port_name);
+                        lport->tt.rport_logoff(rdata);
+
+                        new_rdata = lport->tt.rport_create(lport,
+                                                           rdata->ids.port_id);
+                        if (new_rdata) {
+                                new_rdata->disc_id = disc->disc_id;
+                                lport->tt.rport_login(new_rdata);
+                        }
+                        goto out;
+                }
+                rdata->disc_id = disc->disc_id;
+                lport->tt.rport_login(rdata);
+        } else if (ntohs(cp->ct_cmd) == FC_FS_RJT) {
+                FC_DISC_DBG(disc, "GPN_ID rejected reason %x exp %x\n",
+                            cp->ct_reason, cp->ct_explan);
+                lport->tt.rport_logoff(rdata);
+        } else {
+                FC_DISC_DBG(disc, "GPN_ID unexpected response code %x\n",
+                            ntohs(cp->ct_cmd));
+redisc:
+                fc_disc_restart(disc);
         }
-        return;
 out:
-        kfree(dp);
+        mutex_unlock(&disc->disc_mutex);
+        kref_put(&rdata->kref, lport->tt.rport_destroy);
+}
+
+/**
+ * fc_disc_gpn_id_req() - Send Get Port Names by ID (GPN_ID) request
+ * @lport: local port
+ * @rdata: remote port private data
+ *
+ * Locking Note: This function expects that the disc_mutex is locked
+ *               before it is called.
+ * On failure, an error code is returned.
+ */
+static int fc_disc_gpn_id_req(struct fc_lport *lport,
+                              struct fc_rport_priv *rdata)
+{
+        struct fc_frame *fp;
+
+        fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
+                            sizeof(struct fc_ns_fid));
+        if (!fp)
+                return -ENOMEM;
+        if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, FC_NS_GPN_ID,
+                                 fc_disc_gpn_id_resp, rdata, lport->e_d_tov))
+                return -ENOMEM;
+        kref_get(&rdata->kref);
+        return 0;
+}
+
+/**
+ * fc_disc_single() - Discover the directory information for a single target
+ * @lport: local port
+ * @dp: The port to rediscover
+ *
+ * Locking Note: This function expects that the disc_mutex is locked
+ *               before it is called.
+ */
+static int fc_disc_single(struct fc_lport *lport, struct fc_disc_port *dp)
+{
+        struct fc_rport_priv *rdata;
+
+        rdata = lport->tt.rport_create(lport, dp->port_id);
+        if (!rdata)
+                return -ENOMEM;
+        rdata->disc_id = 0;
+        return fc_disc_gpn_id_req(lport, rdata);
 }
 
 /**
@@ -841,18 +726,12 @@ int fc_disc_init(struct fc_lport *lport)
         if (!lport->tt.disc_recv_req)
                 lport->tt.disc_recv_req = fc_disc_recv_req;
 
-        if (!lport->tt.rport_lookup)
-                lport->tt.rport_lookup = fc_disc_lookup_rport;
-
         disc = &lport->disc;
         INIT_DELAYED_WORK(&disc->disc_work, fc_disc_timeout);
         mutex_init(&disc->disc_mutex);
         INIT_LIST_HEAD(&disc->rports);
-        INIT_LIST_HEAD(&disc->rogue_rports);
 
         disc->lport = lport;
-        disc->delay = FC_DISC_DELAY;
-        disc->event = DISC_EV_NONE;
 
         return 0;
 }
diff --git a/drivers/scsi/libfc/fc_elsct.c b/drivers/scsi/libfc/fc_elsct.c
index 5878b34bff18..5cfa68732e9d 100644
--- a/drivers/scsi/libfc/fc_elsct.c
+++ b/drivers/scsi/libfc/fc_elsct.c
@@ -32,7 +32,7 @@
  * fc_elsct_send - sends ELS/CT frame
  */
 static struct fc_seq *fc_elsct_send(struct fc_lport *lport,
-                                    struct fc_rport *rport,
+                                    u32 did,
                                     struct fc_frame *fp,
                                     unsigned int op,
                                     void (*resp)(struct fc_seq *,
@@ -41,16 +41,17 @@ static struct fc_seq *fc_elsct_send(struct fc_lport *lport,
                                     void *arg, u32 timer_msec)
 {
         enum fc_rctl r_ctl;
-        u32 did = FC_FID_NONE;
         enum fc_fh_type fh_type;
         int rc;
 
         /* ELS requests */
         if ((op >= ELS_LS_RJT) && (op <= ELS_AUTH_ELS))
-                rc = fc_els_fill(lport, rport, fp, op, &r_ctl, &did, &fh_type);
-        else
+                rc = fc_els_fill(lport, did, fp, op, &r_ctl, &fh_type);
+        else {
                 /* CT requests */
-                rc = fc_ct_fill(lport, fp, op, &r_ctl, &did, &fh_type);
+                rc = fc_ct_fill(lport, did, fp, op, &r_ctl, &fh_type);
+                did = FC_FID_DIR_SERV;
+        }
 
         if (rc)
                 return NULL;
@@ -69,3 +70,41 @@ int fc_elsct_init(struct fc_lport *lport)
         return 0;
 }
 EXPORT_SYMBOL(fc_elsct_init);
+
+/**
+ * fc_els_resp_type() - return string describing ELS response for debug.
+ * @fp: frame pointer with possible error code.
+ */
+const char *fc_els_resp_type(struct fc_frame *fp)
+{
+        const char *msg;
+        if (IS_ERR(fp)) {
+                switch (-PTR_ERR(fp)) {
+                case FC_NO_ERR:
+                        msg = "response no error";
+                        break;
+                case FC_EX_TIMEOUT:
+                        msg = "response timeout";
+                        break;
+                case FC_EX_CLOSED:
+                        msg = "response closed";
+                        break;
+                default:
+                        msg = "response unknown error";
+                        break;
+                }
+        } else {
+                switch (fc_frame_payload_op(fp)) {
+                case ELS_LS_ACC:
+                        msg = "accept";
+                        break;
+                case ELS_LS_RJT:
+                        msg = "reject";
+                        break;
+                default:
+                        msg = "response unknown ELS";
+                        break;
+                }
+        }
+        return msg;
+}
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index 145ab9ba55ea..c1c15748220c 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -32,6 +32,9 @@
 #include <scsi/libfc.h>
 #include <scsi/fc_encode.h>
 
+u16     fc_cpu_mask;            /* cpu mask for possible cpus */
+EXPORT_SYMBOL(fc_cpu_mask);
+static u16      fc_cpu_order;   /* 2's power to represent total possible cpus */
 static struct kmem_cache *fc_em_cachep;        /* cache for exchanges */
 
 /*
@@ -48,6 +51,20 @@ static struct kmem_cache *fc_em_cachep;        /* cache for exchanges */
  */
 
 /*
+ * Per cpu exchange pool
+ *
+ * This structure manages per cpu exchanges in array of exchange pointers.
+ * This array is allocated followed by struct fc_exch_pool memory for
+ * assigned range of exchanges to per cpu pool.
+ */
+struct fc_exch_pool {
+        u16             next_index;     /* next possible free exchange index */
+        u16             total_exches;   /* total allocated exchanges */
+        spinlock_t      lock;           /* exch pool lock */
+        struct list_head        ex_list;        /* allocated exchanges list */
+};
+
+/*
  * Exchange manager.
  *
  * This structure is the center for creating exchanges and sequences.
@@ -55,17 +72,13 @@ static struct kmem_cache *fc_em_cachep;        /* cache for exchanges */
  */
 struct fc_exch_mgr {
         enum fc_class   class;          /* default class for sequences */
-        spinlock_t      em_lock;        /* exchange manager lock,
-                                           must be taken before ex_lock */
-        u16             last_xid;       /* last allocated exchange ID */
+        struct kref     kref;           /* exchange mgr reference count */
         u16             min_xid;        /* min exchange ID */
         u16             max_xid;        /* max exchange ID */
-        u16             max_read;       /* max exchange ID for read */
-        u16             last_read;      /* last xid allocated for read */
-        u32     total_exches;           /* total allocated exchanges */
         struct list_head        ex_list;        /* allocated exchanges list */
-        struct fc_lport *lp;            /* fc device instance */
         mempool_t       *ep_pool;       /* reserve ep's */
+        u16             pool_max_index; /* max exch array index in exch pool */
+        struct fc_exch_pool *pool;      /* per cpu exch pool */
 
         /*
          * currently exchange mgr stats are updated but not used.
@@ -80,10 +93,15 @@ struct fc_exch_mgr {
                 atomic_t seq_not_found;
                 atomic_t non_bls_resp;
         } stats;
-        struct fc_exch **exches;        /* for exch pointers indexed by xid */
 };
 #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq)
 
+struct fc_exch_mgr_anchor {
+        struct list_head ema_list;
+        struct fc_exch_mgr *mp;
+        bool (*match)(struct fc_frame *);
+};
+
 static void fc_exch_rrq(struct fc_exch *);
 static void fc_seq_ls_acc(struct fc_seq *);
 static void fc_seq_ls_rjt(struct fc_seq *, enum fc_els_rjt_reason,
@@ -167,8 +185,8 @@ static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp);
  * sequence allocation and deallocation must be locked.
  *  - exchange refcnt can be done atomicly without locks.
  *  - sequence allocation must be locked by exch lock.
- *  - If the em_lock and ex_lock must be taken at the same time, then the
- *    em_lock must be taken before the ex_lock.
+ *  - If the EM pool lock and ex_lock must be taken at the same time, then the
+ *    EM pool lock must be taken before the ex_lock.
  */
 
 /*
@@ -268,8 +286,6 @@ static void fc_exch_release(struct fc_exch *ep)
                 mp = ep->em;
                 if (ep->destructor)
                         ep->destructor(&ep->seq, ep->arg);
-                if (ep->lp->tt.exch_put)
-                        ep->lp->tt.exch_put(ep->lp, mp, ep->xid);
                 WARN_ON(!(ep->esb_stat & ESB_ST_COMPLETE));
                 mempool_free(ep, mp->ep_pool);
         }
@@ -299,17 +315,31 @@ static int fc_exch_done_locked(struct fc_exch *ep)
         return rc;
 }
 
-static void fc_exch_mgr_delete_ep(struct fc_exch *ep)
+static inline struct fc_exch *fc_exch_ptr_get(struct fc_exch_pool *pool,
+                                              u16 index)
 {
-        struct fc_exch_mgr *mp;
+        struct fc_exch **exches = (struct fc_exch **)(pool + 1);
+        return exches[index];
+}
 
-        mp = ep->em;
-        spin_lock_bh(&mp->em_lock);
-        WARN_ON(mp->total_exches <= 0);
-        mp->total_exches--;
-        mp->exches[ep->xid - mp->min_xid] = NULL;
+static inline void fc_exch_ptr_set(struct fc_exch_pool *pool, u16 index,
+                                   struct fc_exch *ep)
+{
+        ((struct fc_exch **)(pool + 1))[index] = ep;
+}
+
+static void fc_exch_delete(struct fc_exch *ep)
+{
+        struct fc_exch_pool *pool;
+
+        pool = ep->pool;
+        spin_lock_bh(&pool->lock);
+        WARN_ON(pool->total_exches <= 0);
+        pool->total_exches--;
+        fc_exch_ptr_set(pool, (ep->xid - ep->em->min_xid) >> fc_cpu_order,
+                        NULL);
         list_del(&ep->ex_list);
-        spin_unlock_bh(&mp->em_lock);
+        spin_unlock_bh(&pool->lock);
         fc_exch_release(ep);    /* drop hold for exch in mp */
 }
 
@@ -322,7 +352,7 @@ static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
         if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE))
                 return;
 
-        FC_EXCH_DBG(ep, "Exchange timed out, notifying the upper layer\n");
+        FC_EXCH_DBG(ep, "Exchange timer armed\n");
 
         if (schedule_delayed_work(&ep->timeout_work,
                                   msecs_to_jiffies(timer_msec)))
@@ -408,6 +438,8 @@ static void fc_exch_timeout(struct work_struct *work)
         u32 e_stat;
         int rc = 1;
 
+        FC_EXCH_DBG(ep, "Exchange timed out\n");
+
         spin_lock_bh(&ep->ex_lock);
         if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE))
                 goto unlock;
@@ -427,7 +459,7 @@ static void fc_exch_timeout(struct work_struct *work)
                         rc = fc_exch_done_locked(ep);
                 spin_unlock_bh(&ep->ex_lock);
                 if (!rc)
-                        fc_exch_mgr_delete_ep(ep);
+                        fc_exch_delete(ep);
                 if (resp)
                         resp(sp, ERR_PTR(-FC_EX_TIMEOUT), arg);
                 fc_seq_exch_abort(sp, 2 * ep->r_a_tov);
@@ -460,65 +492,20 @@ static struct fc_seq *fc_seq_alloc(struct fc_exch *ep, u8 seq_id)
         return sp;
 }
 
-/*
- * fc_em_alloc_xid - returns an xid based on request type
- * @lp : ptr to associated lport
- * @fp : ptr to the assocated frame
+/**
+ * fc_exch_em_alloc() - allocate an exchange from a specified EM.
+ * @lport:      ptr to the local port
+ * @mp:         ptr to the exchange manager
  *
- * check the associated fc_fsp_pkt to get scsi command type and
- * command direction to decide from which range this exch id
- * will be allocated from.
- *
- * Returns : 0 or an valid xid
+ * Returns pointer to allocated fc_exch with exch lock held.
  */
-static u16 fc_em_alloc_xid(struct fc_exch_mgr *mp, const struct fc_frame *fp)
-{
-        u16 xid, min, max;
-        u16 *plast;
-        struct fc_exch *ep = NULL;
-
-        if (mp->max_read) {
-                if (fc_fcp_is_read(fr_fsp(fp))) {
-                        min = mp->min_xid;
-                        max = mp->max_read;
-                        plast = &mp->last_read;
-                } else {
-                        min = mp->max_read + 1;
-                        max = mp->max_xid;
-                        plast = &mp->last_xid;
-                }
-        } else {
-                min = mp->min_xid;
-                max = mp->max_xid;
-                plast = &mp->last_xid;
-        }
-        xid = *plast;
-        do {
-                xid = (xid == max) ? min : xid + 1;
-                ep = mp->exches[xid - mp->min_xid];
-        } while ((ep != NULL) && (xid != *plast));
-
-        if (unlikely(ep))
-                xid = 0;
-        else
-                *plast = xid;
-
-        return xid;
-}
-
-/*
- * fc_exch_alloc - allocate an exchange.
- * @mp : ptr to the exchange manager
- * @xid: input xid
- *
- * if xid is supplied zero then assign next free exchange ID
- * from exchange manager, otherwise use supplied xid.
- * Returns with exch lock held.
- */
-struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
-                              struct fc_frame *fp, u16 xid)
+static struct fc_exch *fc_exch_em_alloc(struct fc_lport *lport,
+                                        struct fc_exch_mgr *mp)
 {
         struct fc_exch *ep;
+        unsigned int cpu;
+        u16 index;
+        struct fc_exch_pool *pool;
 
         /* allocate memory for exchange */
         ep = mempool_alloc(mp->ep_pool, GFP_ATOMIC);
@@ -528,16 +515,17 @@ struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
         }
         memset(ep, 0, sizeof(*ep));
 
-        spin_lock_bh(&mp->em_lock);
-        /* alloc xid if input xid 0 */
-        if (!xid) {
-                /* alloc a new xid */
-                xid = fc_em_alloc_xid(mp, fp);
-                if (!xid) {
-                        printk(KERN_WARNING "libfc: Failed to allocate an exhange\n");
+        cpu = smp_processor_id();
+        pool = per_cpu_ptr(mp->pool, cpu);
+        spin_lock_bh(&pool->lock);
+        index = pool->next_index;
+        /* allocate new exch from pool */
+        while (fc_exch_ptr_get(pool, index)) {
+                index = index == mp->pool_max_index ? 0 : index + 1;
+                if (index == pool->next_index)
                         goto err;
-                }
         }
+        pool->next_index = index == mp->pool_max_index ? 0 : index + 1;
 
         fc_exch_hold(ep);       /* hold for exch in mp */
         spin_lock_init(&ep->ex_lock);
@@ -548,18 +536,19 @@ struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
          */
         spin_lock_bh(&ep->ex_lock);
 
-        mp->exches[xid - mp->min_xid] = ep;
-        list_add_tail(&ep->ex_list, &mp->ex_list);
+        fc_exch_ptr_set(pool, index, ep);
+        list_add_tail(&ep->ex_list, &pool->ex_list);
         fc_seq_alloc(ep, ep->seq_id++);
-        mp->total_exches++;
-        spin_unlock_bh(&mp->em_lock);
+        pool->total_exches++;
+        spin_unlock_bh(&pool->lock);
 
         /*
          *  update exchange
          */
-        ep->oxid = ep->xid = xid;
+        ep->oxid = ep->xid = (index << fc_cpu_order | cpu) + mp->min_xid;
         ep->em = mp;
-        ep->lp = mp->lp;
+        ep->pool = pool;
+        ep->lp = lport;
         ep->f_ctl = FC_FC_FIRST_SEQ;    /* next seq is first seq */
         ep->rxid = FC_XID_UNKNOWN;
         ep->class = mp->class;
@@ -567,11 +556,36 @@ struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
 out:
         return ep;
 err:
-        spin_unlock_bh(&mp->em_lock);
+        spin_unlock_bh(&pool->lock);
         atomic_inc(&mp->stats.no_free_exch_xid);
         mempool_free(ep, mp->ep_pool);
         return NULL;
 }
+
+/**
+ * fc_exch_alloc() - allocate an exchange.
+ * @lport:      ptr to the local port
+ * @fp:         ptr to the FC frame
+ *
+ * This function walks the list of the exchange manager(EM)
+ * anchors to select a EM for new exchange allocation. The
+ * EM is selected having either a NULL match function pointer
+ * or call to match function returning true.
+ */
+struct fc_exch *fc_exch_alloc(struct fc_lport *lport, struct fc_frame *fp)
+{
+        struct fc_exch_mgr_anchor *ema;
+        struct fc_exch *ep;
+
+        list_for_each_entry(ema, &lport->ema_list, ema_list) {
+                if (!ema->match || ema->match(fp)) {
+                        ep = fc_exch_em_alloc(lport, ema->mp);
+                        if (ep)
+                                return ep;
+                }
+        }
+        return NULL;
+}
 EXPORT_SYMBOL(fc_exch_alloc);
 
 /*
@@ -579,16 +593,18 @@ EXPORT_SYMBOL(fc_exch_alloc);
  */
 static struct fc_exch *fc_exch_find(struct fc_exch_mgr *mp, u16 xid)
 {
+        struct fc_exch_pool *pool;
         struct fc_exch *ep = NULL;
 
         if ((xid >= mp->min_xid) && (xid <= mp->max_xid)) {
-                spin_lock_bh(&mp->em_lock);
-                ep = mp->exches[xid - mp->min_xid];
+                pool = per_cpu_ptr(mp->pool, xid & fc_cpu_mask);
+                spin_lock_bh(&pool->lock);
+                ep = fc_exch_ptr_get(pool, (xid - mp->min_xid) >> fc_cpu_order);
                 if (ep) {
                         fc_exch_hold(ep);
                         WARN_ON(ep->xid != xid);
                 }
-                spin_unlock_bh(&mp->em_lock);
+                spin_unlock_bh(&pool->lock);
         }
         return ep;
 }
@@ -602,7 +618,7 @@ void fc_exch_done(struct fc_seq *sp)
         rc = fc_exch_done_locked(ep);
         spin_unlock_bh(&ep->ex_lock);
         if (!rc)
-                fc_exch_mgr_delete_ep(ep);
+                fc_exch_delete(ep);
 }
 EXPORT_SYMBOL(fc_exch_done);
 
@@ -610,12 +626,14 @@ EXPORT_SYMBOL(fc_exch_done);
  * Allocate a new exchange as responder.
  * Sets the responder ID in the frame header.
  */
-static struct fc_exch *fc_exch_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
+static struct fc_exch *fc_exch_resp(struct fc_lport *lport,
+                                    struct fc_exch_mgr *mp,
+                                    struct fc_frame *fp)
 {
         struct fc_exch *ep;
         struct fc_frame_header *fh;
 
-        ep = mp->lp->tt.exch_get(mp->lp, fp);
+        ep = fc_exch_alloc(lport, fp);
         if (ep) {
                 ep->class = fc_frame_class(fp);
 
@@ -641,7 +659,7 @@ static struct fc_exch *fc_exch_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
                         ep->esb_stat &= ~ESB_ST_SEQ_INIT;
 
                 fc_exch_hold(ep);       /* hold for caller */
-                spin_unlock_bh(&ep->ex_lock);   /* lock from exch_get */
+                spin_unlock_bh(&ep->ex_lock);   /* lock from fc_exch_alloc */
         }
         return ep;
 }
@@ -651,7 +669,8 @@ static struct fc_exch *fc_exch_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
  * If fc_pf_rjt_reason is FC_RJT_NONE then this function will have a hold
  * on the ep that should be released by the caller.
  */
-static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_exch_mgr *mp,
+static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_lport *lport,
+                                                 struct fc_exch_mgr *mp,
                                                  struct fc_frame *fp)
 {
         struct fc_frame_header *fh = fc_frame_header_get(fp);
@@ -705,7 +724,7 @@ static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_exch_mgr *mp,
                                 reject = FC_RJT_RX_ID;
                                 goto rel;
                         }
-                        ep = fc_exch_resp(mp, fp);
+                        ep = fc_exch_resp(lport, mp, fp);
                         if (!ep) {
                                 reject = FC_RJT_EXCH_EST;       /* XXX */
                                 goto out;
@@ -822,7 +841,6 @@ struct fc_seq *fc_seq_start_next(struct fc_seq *sp)
         struct fc_exch *ep = fc_seq_exch(sp);
 
         spin_lock_bh(&ep->ex_lock);
-        WARN_ON((ep->esb_stat & ESB_ST_COMPLETE) != 0);
         sp = fc_seq_start_next_locked(sp);
         spin_unlock_bh(&ep->ex_lock);
 
@@ -999,8 +1017,8 @@ static void fc_exch_send_ba_rjt(struct fc_frame *rx_fp,
          */
         memcpy(fh->fh_s_id, rx_fh->fh_d_id, 3);
         memcpy(fh->fh_d_id, rx_fh->fh_s_id, 3);
-        fh->fh_ox_id = rx_fh->fh_rx_id;
-        fh->fh_rx_id = rx_fh->fh_ox_id;
+        fh->fh_ox_id = rx_fh->fh_ox_id;
+        fh->fh_rx_id = rx_fh->fh_rx_id;
         fh->fh_seq_cnt = rx_fh->fh_seq_cnt;
         fh->fh_r_ctl = FC_RCTL_BA_RJT;
         fh->fh_type = FC_TYPE_BLS;
@@ -1097,7 +1115,7 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
         enum fc_pf_rjt_reason reject;
 
         fr_seq(fp) = NULL;
-        reject = fc_seq_lookup_recip(mp, fp);
+        reject = fc_seq_lookup_recip(lp, mp, fp);
         if (reject == FC_RJT_NONE) {
                 sp = fr_seq(fp);        /* sequence will be held */
                 ep = fc_seq_exch(sp);
@@ -1123,7 +1141,7 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
                         lp->tt.lport_recv(lp, sp, fp);
                 fc_exch_release(ep);    /* release from lookup */
         } else {
-                FC_EM_DBG(mp, "exch/seq lookup failed: reject %x\n", reject);
+                FC_LPORT_DBG(lp, "exch/seq lookup failed: reject %x\n", reject);
                 fc_frame_free(fp);
         }
 }
@@ -1193,7 +1211,7 @@ static void fc_exch_recv_seq_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
                 WARN_ON(fc_seq_exch(sp) != ep);
                 spin_unlock_bh(&ep->ex_lock);
                 if (!rc)
-                        fc_exch_mgr_delete_ep(ep);
+                        fc_exch_delete(ep);
         }
 
         /*
@@ -1229,13 +1247,12 @@ static void fc_exch_recv_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
         struct fc_seq *sp;
 
         sp = fc_seq_lookup_orig(mp, fp);        /* doesn't hold sequence */
-        if (!sp) {
+
+        if (!sp)
                 atomic_inc(&mp->stats.xid_not_found);
-                FC_EM_DBG(mp, "seq lookup failed\n");
-        } else {
+        else
                 atomic_inc(&mp->stats.non_bls_resp);
-                FC_EM_DBG(mp, "non-BLS response to sequence");
-        }
+
         fc_frame_free(fp);
 }
 
@@ -1304,7 +1321,7 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
                 rc = fc_exch_done_locked(ep);
         spin_unlock_bh(&ep->ex_lock);
         if (!rc)
-                fc_exch_mgr_delete_ep(ep);
+                fc_exch_delete(ep);
 
         if (resp)
                 resp(sp, fp, ex_resp_arg);
@@ -1447,44 +1464,77 @@ static void fc_exch_reset(struct fc_exch *ep)
         rc = fc_exch_done_locked(ep);
         spin_unlock_bh(&ep->ex_lock);
         if (!rc)
-                fc_exch_mgr_delete_ep(ep);
+                fc_exch_delete(ep);
 
         if (resp)
                 resp(sp, ERR_PTR(-FC_EX_CLOSED), arg);
 }
 
-/*
- * Reset an exchange manager, releasing all sequences and exchanges.
- * If sid is non-zero, reset only exchanges we source from that FID.
- * If did is non-zero, reset only exchanges destined to that FID.
+/**
+ * fc_exch_pool_reset() - Resets an per cpu exches pool.
+ * @lport:      ptr to the local port
+ * @pool:       ptr to the per cpu exches pool
+ * @sid:        source FC ID
+ * @did:        destination FC ID
+ *
+ * Resets an per cpu exches pool, releasing its all sequences
+ * and exchanges. If sid is non-zero, then reset only exchanges
+ * we sourced from that FID. If did is non-zero, reset only
+ * exchanges destined to that FID.
  */
-void fc_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
+static void fc_exch_pool_reset(struct fc_lport *lport,
+                               struct fc_exch_pool *pool,
+                               u32 sid, u32 did)
 {
         struct fc_exch *ep;
         struct fc_exch *next;
-        struct fc_exch_mgr *mp = lp->emp;
 
-        spin_lock_bh(&mp->em_lock);
+        spin_lock_bh(&pool->lock);
 restart:
-        list_for_each_entry_safe(ep, next, &mp->ex_list, ex_list) {
-                if ((sid == 0 || sid == ep->sid) &&
+        list_for_each_entry_safe(ep, next, &pool->ex_list, ex_list) {
+                if ((lport == ep->lp) &&
+                    (sid == 0 || sid == ep->sid) &&
                     (did == 0 || did == ep->did)) {
                         fc_exch_hold(ep);
-                        spin_unlock_bh(&mp->em_lock);
+                        spin_unlock_bh(&pool->lock);
 
                         fc_exch_reset(ep);
 
                         fc_exch_release(ep);
-                        spin_lock_bh(&mp->em_lock);
+                        spin_lock_bh(&pool->lock);
 
                         /*
-                         * must restart loop incase while lock was down
-                         * multiple eps were released.
+                         * must restart loop incase while lock
+                         * was down multiple eps were released.
                          */
                         goto restart;
                 }
         }
-        spin_unlock_bh(&mp->em_lock);
+        spin_unlock_bh(&pool->lock);
+}
+
+/**
+ * fc_exch_mgr_reset() - Resets all EMs of a lport
+ * @lport:      ptr to the local port
+ * @sid:        source FC ID
+ * @did:        destination FC ID
+ *
+ * Reset all EMs of a lport, releasing its all sequences and
+ * exchanges. If sid is non-zero, then reset only exchanges
+ * we sourced from that FID. If did is non-zero, reset only
+ * exchanges destined to that FID.
+ */
+void fc_exch_mgr_reset(struct fc_lport *lport, u32 sid, u32 did)
+{
+        struct fc_exch_mgr_anchor *ema;
+        unsigned int cpu;
+
+        list_for_each_entry(ema, &lport->ema_list, ema_list) {
+                for_each_possible_cpu(cpu)
+                        fc_exch_pool_reset(lport,
+                                           per_cpu_ptr(ema->mp->pool, cpu),
+                                           sid, did);
+        }
 }
 EXPORT_SYMBOL(fc_exch_mgr_reset);
 
@@ -1730,85 +1780,129 @@ reject:
         fc_frame_free(fp);
 }
 
+struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *lport,
+                                           struct fc_exch_mgr *mp,
+                                           bool (*match)(struct fc_frame *))
+{
+        struct fc_exch_mgr_anchor *ema;
+
+        ema = kmalloc(sizeof(*ema), GFP_ATOMIC);
+        if (!ema)
+                return ema;
+
+        ema->mp = mp;
+        ema->match = match;
+        /* add EM anchor to EM anchors list */
+        list_add_tail(&ema->ema_list, &lport->ema_list);
+        kref_get(&mp->kref);
+        return ema;
+}
+EXPORT_SYMBOL(fc_exch_mgr_add);
+
+static void fc_exch_mgr_destroy(struct kref *kref)
+{
+        struct fc_exch_mgr *mp = container_of(kref, struct fc_exch_mgr, kref);
+
+        mempool_destroy(mp->ep_pool);
+        free_percpu(mp->pool);
+        kfree(mp);
+}
+
+void fc_exch_mgr_del(struct fc_exch_mgr_anchor *ema)
+{
+        /* remove EM anchor from EM anchors list */
+        list_del(&ema->ema_list);
+        kref_put(&ema->mp->kref, fc_exch_mgr_destroy);
+        kfree(ema);
+}
+EXPORT_SYMBOL(fc_exch_mgr_del);
+
 struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
                                       enum fc_class class,
-                                      u16 min_xid, u16 max_xid)
+                                      u16 min_xid, u16 max_xid,
+                                      bool (*match)(struct fc_frame *))
 {
         struct fc_exch_mgr *mp;
-        size_t len;
+        u16 pool_exch_range;
+        size_t pool_size;
+        unsigned int cpu;
+        struct fc_exch_pool *pool;
 
-        if (max_xid <= min_xid || min_xid == 0 || max_xid == FC_XID_UNKNOWN) {
+        if (max_xid <= min_xid || max_xid == FC_XID_UNKNOWN ||
+            (min_xid & fc_cpu_mask) != 0) {
                 FC_LPORT_DBG(lp, "Invalid min_xid 0x:%x and max_xid 0x:%x\n",
                              min_xid, max_xid);
                 return NULL;
         }
 
         /*
-         * Memory need for EM
+         * allocate memory for EM
          */
-#define xid_ok(i, m1, m2) (((i) >= (m1)) && ((i) <= (m2)))
-        len = (max_xid - min_xid + 1) * (sizeof(struct fc_exch *));
-        len += sizeof(struct fc_exch_mgr);
-
-        mp = kzalloc(len, GFP_ATOMIC);
+        mp = kzalloc(sizeof(struct fc_exch_mgr), GFP_ATOMIC);
         if (!mp)
                 return NULL;
 
         mp->class = class;
-        mp->total_exches = 0;
-        mp->exches = (struct fc_exch **)(mp + 1);
-        mp->lp = lp;
         /* adjust em exch xid range for offload */
         mp->min_xid = min_xid;
         mp->max_xid = max_xid;
-        mp->last_xid = min_xid - 1;
-        mp->max_read = 0;
-        mp->last_read = 0;
-        if (lp->lro_enabled && xid_ok(lp->lro_xid, min_xid, max_xid)) {
-                mp->max_read = lp->lro_xid;
-                mp->last_read = min_xid - 1;
-                mp->last_xid = mp->max_read;
-        } else {
-                /* disable lro if no xid control over read */
-                lp->lro_enabled = 0;
-        }
-
-        INIT_LIST_HEAD(&mp->ex_list);
-        spin_lock_init(&mp->em_lock);
 
         mp->ep_pool = mempool_create_slab_pool(2, fc_em_cachep);
         if (!mp->ep_pool)
                 goto free_mp;
 
+        /*
+         * Setup per cpu exch pool with entire exchange id range equally
+         * divided across all cpus. The exch pointers array memory is
+         * allocated for exch range per pool.
+         */
+        pool_exch_range = (mp->max_xid - mp->min_xid + 1) / (fc_cpu_mask + 1);
+        mp->pool_max_index = pool_exch_range - 1;
+
+        /*
+         * Allocate and initialize per cpu exch pool
+         */
+        pool_size = sizeof(*pool) + pool_exch_range * sizeof(struct fc_exch *);
+        mp->pool = __alloc_percpu(pool_size, __alignof__(struct fc_exch_pool));
+        if (!mp->pool)
+                goto free_mempool;
+        for_each_possible_cpu(cpu) {
+                pool = per_cpu_ptr(mp->pool, cpu);
+                spin_lock_init(&pool->lock);
+                INIT_LIST_HEAD(&pool->ex_list);
+        }
+
+        kref_init(&mp->kref);
+        if (!fc_exch_mgr_add(lp, mp, match)) {
+                free_percpu(mp->pool);
+                goto free_mempool;
+        }
+
+        /*
+         * Above kref_init() sets mp->kref to 1 and then
+         * call to fc_exch_mgr_add incremented mp->kref again,
+         * so adjust that extra increment.
+         */
+        kref_put(&mp->kref, fc_exch_mgr_destroy);
         return mp;
 
+free_mempool:
+        mempool_destroy(mp->ep_pool);
 free_mp:
         kfree(mp);
         return NULL;
 }
 EXPORT_SYMBOL(fc_exch_mgr_alloc);
 
-void fc_exch_mgr_free(struct fc_exch_mgr *mp)
+void fc_exch_mgr_free(struct fc_lport *lport)
 {
-        WARN_ON(!mp);
-        /*
-         * The total exch count must be zero
-         * before freeing exchange manager.
-         */
-        WARN_ON(mp->total_exches != 0);
-        mempool_destroy(mp->ep_pool);
-        kfree(mp);
+        struct fc_exch_mgr_anchor *ema, *next;
+
+        list_for_each_entry_safe(ema, next, &lport->ema_list, ema_list)
+                fc_exch_mgr_del(ema);
 }
 EXPORT_SYMBOL(fc_exch_mgr_free);
 
-struct fc_exch *fc_exch_get(struct fc_lport *lp, struct fc_frame *fp)
-{
-        if (!lp || !lp->emp)
-                return NULL;
-
-        return fc_exch_alloc(lp->emp, fp, 0);
-}
-EXPORT_SYMBOL(fc_exch_get);
 
 struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
                                 struct fc_frame *fp,
@@ -1823,7 +1917,7 @@ struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
         struct fc_frame_header *fh;
         int rc = 1;
 
-        ep = lp->tt.exch_get(lp, fp);
+        ep = fc_exch_alloc(lp, fp);
         if (!ep) {
                 fc_frame_free(fp);
                 return NULL;
@@ -1843,7 +1937,8 @@ struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
         fc_exch_setup_hdr(ep, fp, ep->f_ctl);
         sp->cnt++;
 
-        fc_fcp_ddp_setup(fr_fsp(fp), ep->xid);
+        if (ep->xid <= lp->lro_xid)
+                fc_fcp_ddp_setup(fr_fsp(fp), ep->xid);
 
         if (unlikely(lp->tt.frame_send(lp, fp)))
                 goto err;
@@ -1860,7 +1955,7 @@ err:
         rc = fc_exch_done_locked(ep);
         spin_unlock_bh(&ep->ex_lock);
         if (!rc)
-                fc_exch_mgr_delete_ep(ep);
+                fc_exch_delete(ep);
         return NULL;
 }
 EXPORT_SYMBOL(fc_exch_seq_send);
@@ -1868,24 +1963,44 @@ EXPORT_SYMBOL(fc_exch_seq_send);
 /*
  * Receive a frame
  */
-void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
-                  struct fc_frame *fp)
+void fc_exch_recv(struct fc_lport *lp, struct fc_frame *fp)
 {
         struct fc_frame_header *fh = fc_frame_header_get(fp);
-        u32 f_ctl;
+        struct fc_exch_mgr_anchor *ema;
+        u32 f_ctl, found = 0;
+        u16 oxid;
 
         /* lport lock ? */
-        if (!lp || !mp || (lp->state == LPORT_ST_NONE)) {
+        if (!lp || lp->state == LPORT_ST_DISABLED) {
                 FC_LPORT_DBG(lp, "Receiving frames for an lport that "
                              "has not been initialized correctly\n");
                 fc_frame_free(fp);
                 return;
         }
 
+        f_ctl = ntoh24(fh->fh_f_ctl);
+        oxid = ntohs(fh->fh_ox_id);
+        if (f_ctl & FC_FC_EX_CTX) {
+                list_for_each_entry(ema, &lp->ema_list, ema_list) {
+                        if ((oxid >= ema->mp->min_xid) &&
+                            (oxid <= ema->mp->max_xid)) {
+                                found = 1;
+                                break;
+                        }
+                }
+
+                if (!found) {
+                        FC_LPORT_DBG(lp, "Received response for out "
+                                     "of range oxid:%hx\n", oxid);
+                        fc_frame_free(fp);
+                        return;
+                }
+        } else
+                ema = list_entry(lp->ema_list.prev, typeof(*ema), ema_list);
+
         /*
          * If frame is marked invalid, just drop it.
          */
-        f_ctl = ntoh24(fh->fh_f_ctl);
         switch (fr_eof(fp)) {
         case FC_EOF_T:
                 if (f_ctl & FC_FC_END_SEQ)
@@ -1893,34 +2008,24 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
                 /* fall through */
         case FC_EOF_N:
                 if (fh->fh_type == FC_TYPE_BLS)
-                        fc_exch_recv_bls(mp, fp);
+                        fc_exch_recv_bls(ema->mp, fp);
                 else if ((f_ctl & (FC_FC_EX_CTX | FC_FC_SEQ_CTX)) ==
                          FC_FC_EX_CTX)
-                        fc_exch_recv_seq_resp(mp, fp);
+                        fc_exch_recv_seq_resp(ema->mp, fp);
                 else if (f_ctl & FC_FC_SEQ_CTX)
-                        fc_exch_recv_resp(mp, fp);
+                        fc_exch_recv_resp(ema->mp, fp);
                 else
-                        fc_exch_recv_req(lp, mp, fp);
+                        fc_exch_recv_req(lp, ema->mp, fp);
                 break;
         default:
-                FC_EM_DBG(mp, "dropping invalid frame (eof %x)", fr_eof(fp));
+                FC_LPORT_DBG(lp, "dropping invalid frame (eof %x)", fr_eof(fp));
                 fc_frame_free(fp);
-                break;
         }
 }
 EXPORT_SYMBOL(fc_exch_recv);
 
 int fc_exch_init(struct fc_lport *lp)
 {
-        if (!lp->tt.exch_get) {
-                /*
-                 *  exch_put() should be NULL if
-                 *  exch_get() is NULL
-                 */
-                WARN_ON(lp->tt.exch_put);
-                lp->tt.exch_get = fc_exch_get;
-        }
-
         if (!lp->tt.seq_start_next)
                 lp->tt.seq_start_next = fc_seq_start_next;
 
@@ -1942,6 +2047,28 @@ int fc_exch_init(struct fc_lport *lp)
         if (!lp->tt.seq_exch_abort)
                 lp->tt.seq_exch_abort = fc_seq_exch_abort;
 
+        /*
+         * Initialize fc_cpu_mask and fc_cpu_order. The
+         * fc_cpu_mask is set for nr_cpu_ids rounded up
+         * to order of 2's * power and order is stored
+         * in fc_cpu_order as this is later required in
+         * mapping between an exch id and exch array index
+         * in per cpu exch pool.
+         *
+         * This round up is required to align fc_cpu_mask
+         * to exchange id's lower bits such that all incoming
+         * frames of an exchange gets delivered to the same
+         * cpu on which exchange originated by simple bitwise
+         * AND operation between fc_cpu_mask and exchange id.
+         */
+        fc_cpu_mask = 1;
+        fc_cpu_order = 0;
+        while (fc_cpu_mask < nr_cpu_ids) {
+                fc_cpu_mask <<= 1;
+                fc_cpu_order++;
+        }
+        fc_cpu_mask--;
+
         return 0;
 }
 EXPORT_SYMBOL(fc_exch_init);
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index e303e0d12c4b..59a4408b27b5 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -507,33 +507,6 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
         f_ctl = FC_FC_REL_OFF;
         WARN_ON(!seq);
 
-        /*
-         * If a get_page()/put_page() will fail, don't use sg lists
-         * in the fc_frame structure.
-         *
-         * The put_page() may be long after the I/O has completed
-         * in the case of FCoE, since the network driver does it
-         * via free_skb().  See the test in free_pages_check().
-         *
-         * Test this case with 'dd </dev/zero >/dev/st0 bs=64k'.
-         */
-        if (using_sg) {
-                for (sg = scsi_sglist(sc); sg; sg = sg_next(sg)) {
-                        if (page_count(sg_page(sg)) == 0 ||
-                            (sg_page(sg)->flags & (1 << PG_lru |
-                                                   1 << PG_private |
-                                                   1 << PG_locked |
-                                                   1 << PG_active |
-                                                   1 << PG_slab |
-                                                   1 << PG_swapcache |
-                                                   1 << PG_writeback |
-                                                   1 << PG_reserved |
-                                                   1 << PG_buddy))) {
-                                using_sg = 0;
-                                break;
-                        }
-                }
-        }
         sg = scsi_sglist(sc);
 
         while (remaining > 0 && sg) {
@@ -569,8 +542,6 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
                 }
                 sg_bytes = min(tlen, sg->length - offset);
                 if (using_sg) {
-                        WARN_ON(skb_shinfo(fp_skb(fp))->nr_frags >
-                                FC_FRAME_SG_LEN);
                         get_page(sg_page(sg));
                         skb_fill_page_desc(fp_skb(fp),
                                            skb_shinfo(fp_skb(fp))->nr_frags,
@@ -1337,7 +1308,7 @@ static void fc_fcp_rec(struct fc_fcp_pkt *fsp)
         fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rport->port_id,
                        fc_host_port_id(rp->local_port->host), FC_TYPE_ELS,
                        FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
-        if (lp->tt.elsct_send(lp, rport, fp, ELS_REC, fc_fcp_rec_resp,
+        if (lp->tt.elsct_send(lp, rport->port_id, fp, ELS_REC, fc_fcp_rec_resp,
                               fsp, jiffies_to_msecs(FC_SCSI_REC_TOV))) {
                 fc_fcp_pkt_hold(fsp);           /* hold while REC outstanding */
                 return;
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 745fa5555d6a..bd2f77197447 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -113,7 +113,7 @@ static void fc_lport_enter_ready(struct fc_lport *);
 static void fc_lport_enter_logo(struct fc_lport *);
 
 static const char *fc_lport_state_names[] = {
-        [LPORT_ST_NONE] =     "none",
+        [LPORT_ST_DISABLED] = "disabled",
         [LPORT_ST_FLOGI] =    "FLOGI",
         [LPORT_ST_DNS] =      "dNS",
         [LPORT_ST_RPN_ID] =   "RPN_ID",
@@ -133,57 +133,44 @@ static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
 /**
  * fc_lport_rport_callback() - Event handler for rport events
  * @lport: The lport which is receiving the event
- * @rport: The rport which the event has occured on
+ * @rdata: private remote port data
  * @event: The event that occured
  *
  * Locking Note: The rport lock should not be held when calling
  *               this function.
  */
 static void fc_lport_rport_callback(struct fc_lport *lport,
-                                    struct fc_rport *rport,
+                                    struct fc_rport_priv *rdata,
                                     enum fc_rport_event event)
 {
         FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event,
-                     rport->port_id);
+                     rdata->ids.port_id);
 
+        mutex_lock(&lport->lp_mutex);
         switch (event) {
-        case RPORT_EV_CREATED:
-                if (rport->port_id == FC_FID_DIR_SERV) {
-                        mutex_lock(&lport->lp_mutex);
-                        if (lport->state == LPORT_ST_DNS) {
-                                lport->dns_rp = rport;
-                                fc_lport_enter_rpn_id(lport);
-                        } else {
-                                FC_LPORT_DBG(lport, "Received an CREATED event "
-                                             "on port (%6x) for the directory "
-                                             "server, but the lport is not "
-                                             "in the DNS state, it's in the "
-                                             "%d state", rport->port_id,
-                                             lport->state);
-                                lport->tt.rport_logoff(rport);
-                        }
-                        mutex_unlock(&lport->lp_mutex);
-                } else
-                        FC_LPORT_DBG(lport, "Received an event for port (%6x) "
-                                     "which is not the directory server\n",
-                                     rport->port_id);
+        case RPORT_EV_READY:
+                if (lport->state == LPORT_ST_DNS) {
+                        lport->dns_rp = rdata;
+                        fc_lport_enter_rpn_id(lport);
+                } else {
+                        FC_LPORT_DBG(lport, "Received an READY event "
+                                     "on port (%6x) for the directory "
+                                     "server, but the lport is not "
+                                     "in the DNS state, it's in the "
+                                     "%d state", rdata->ids.port_id,
+                                     lport->state);
+                        lport->tt.rport_logoff(rdata);
+                }
                 break;
         case RPORT_EV_LOGO:
         case RPORT_EV_FAILED:
         case RPORT_EV_STOP:
-                if (rport->port_id == FC_FID_DIR_SERV) {
-                        mutex_lock(&lport->lp_mutex);
-                        lport->dns_rp = NULL;
-                        mutex_unlock(&lport->lp_mutex);
-
-                } else
-                        FC_LPORT_DBG(lport, "Received an event for port (%6x) "
-                                     "which is not the directory server\n",
-                                     rport->port_id);
+                lport->dns_rp = NULL;
                 break;
         case RPORT_EV_NONE:
                 break;
         }
+        mutex_unlock(&lport->lp_mutex);
 }
 
 /**
@@ -211,20 +198,13 @@ static void fc_lport_ptp_setup(struct fc_lport *lport,
                                u32 remote_fid, u64 remote_wwpn,
                                u64 remote_wwnn)
 {
-        struct fc_disc_port dp;
-
-        dp.lp = lport;
-        dp.ids.port_id = remote_fid;
-        dp.ids.port_name = remote_wwpn;
-        dp.ids.node_name = remote_wwnn;
-        dp.ids.roles = FC_RPORT_ROLE_UNKNOWN;
-
-        if (lport->ptp_rp) {
+        mutex_lock(&lport->disc.disc_mutex);
+        if (lport->ptp_rp)
                 lport->tt.rport_logoff(lport->ptp_rp);
-                lport->ptp_rp = NULL;
-        }
-
-        lport->ptp_rp = lport->tt.rport_create(&dp);
+        lport->ptp_rp = lport->tt.rport_create(lport, remote_fid);
+        lport->ptp_rp->ids.port_name = remote_wwpn;
+        lport->ptp_rp->ids.node_name = remote_wwnn;
+        mutex_unlock(&lport->disc.disc_mutex);
 
         lport->tt.rport_login(lport->ptp_rp);
 
@@ -472,56 +452,6 @@ static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
 }
 
 /**
- * fc_lport_recv_adisc_req() - Handle received Address Discovery Request
- * @lport: Fibre Channel local port recieving the ADISC
- * @sp: current sequence in the ADISC exchange
- * @fp: ADISC request frame
- *
- * Locking Note: The lport lock is expected to be held before calling
- * this function.
- */
-static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp,
-                                    struct fc_lport *lport)
-{
-        struct fc_frame *fp;
-        struct fc_exch *ep = fc_seq_exch(sp);
-        struct fc_els_adisc *req, *rp;
-        struct fc_seq_els_data rjt_data;
-        size_t len;
-        u32 f_ctl;
-
-        FC_LPORT_DBG(lport, "Received ADISC request while in state %s\n",
-                     fc_lport_state(lport));
-
-        req = fc_frame_payload_get(in_fp, sizeof(*req));
-        if (!req) {
-                rjt_data.fp = NULL;
-                rjt_data.reason = ELS_RJT_LOGIC;
-                rjt_data.explan = ELS_EXPL_NONE;
-                lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
-        } else {
-                len = sizeof(*rp);
-                fp = fc_frame_alloc(lport, len);
-                if (fp) {
-                        rp = fc_frame_payload_get(fp, len);
-                        memset(rp, 0, len);
-                        rp->adisc_cmd = ELS_LS_ACC;
-                        rp->adisc_wwpn = htonll(lport->wwpn);
-                        rp->adisc_wwnn = htonll(lport->wwnn);
-                        hton24(rp->adisc_port_id,
-                               fc_host_port_id(lport->host));
-                        sp = lport->tt.seq_start_next(sp);
-                        f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
-                        f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
-                        fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
-                                       FC_TYPE_ELS, f_ctl, 0);
-                        lport->tt.seq_send(lport, sp, fp);
-                }
-        }
-        fc_frame_free(in_fp);
-}
-
-/**
  * fc_lport_recv_logo_req() - Handle received fabric LOGO request
  * @lport: Fibre Channel local port recieving the LOGO
  * @sp: current sequence in the LOGO exchange
@@ -550,7 +480,7 @@ int fc_fabric_login(struct fc_lport *lport)
         int rc = -1;
 
         mutex_lock(&lport->lp_mutex);
-        if (lport->state == LPORT_ST_NONE) {
+        if (lport->state == LPORT_ST_DISABLED) {
                 fc_lport_enter_reset(lport);
                 rc = 0;
         }
@@ -637,12 +567,13 @@ EXPORT_SYMBOL(fc_fabric_logoff);
 int fc_lport_destroy(struct fc_lport *lport)
 {
         mutex_lock(&lport->lp_mutex);
-        lport->state = LPORT_ST_NONE;
+        lport->state = LPORT_ST_DISABLED;
         lport->link_up = 0;
         lport->tt.frame_send = fc_frame_drop;
         mutex_unlock(&lport->lp_mutex);
 
         lport->tt.fcp_abort_io(lport);
+        lport->tt.disc_stop_final(lport);
         lport->tt.exch_mgr_reset(lport, 0, 0);
         return 0;
 }
@@ -722,7 +653,8 @@ static void fc_lport_enter_ready(struct fc_lport *lport)
 
         fc_lport_state_enter(lport, LPORT_ST_READY);
 
-        lport->tt.disc_start(fc_lport_disc_callback, lport);
+        if (!lport->ptp_rp)
+                lport->tt.disc_start(fc_lport_disc_callback, lport);
 }
 
 /**
@@ -808,8 +740,6 @@ static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
         fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
                            get_unaligned_be64(&flp->fl_wwnn));
 
-        lport->tt.disc_start(fc_lport_disc_callback, lport);
-
 out:
         sp = fr_seq(rx_fp);
         fc_frame_free(rx_fp);
@@ -832,10 +762,6 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
 {
         struct fc_frame_header *fh = fc_frame_header_get(fp);
         void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
-        struct fc_rport *rport;
-        u32 s_id;
-        u32 d_id;
-        struct fc_seq_els_data rjt_data;
 
         mutex_lock(&lport->lp_mutex);
 
@@ -844,11 +770,14 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
          * RSCN here.  These don't require a session.
          * Even if we had a session, it might not be ready.
          */
-        if (fh->fh_type == FC_TYPE_ELS && fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
+        if (!lport->link_up)
+                fc_frame_free(fp);
+        else if (fh->fh_type == FC_TYPE_ELS &&
+                 fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
                 /*
                  * Check opcode.
                  */
-                recv = NULL;
+                recv = lport->tt.rport_recv_req;
                 switch (fc_frame_payload_op(fp)) {
                 case ELS_FLOGI:
                         recv = fc_lport_recv_flogi_req;
@@ -870,34 +799,9 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
                 case ELS_RNID:
                         recv = fc_lport_recv_rnid_req;
                         break;
-                case ELS_ADISC:
-                        recv = fc_lport_recv_adisc_req;
-                        break;
                 }
 
-                if (recv)
-                        recv(sp, fp, lport);
-                else {
-                        /*
-                         * Find session.
-                         * If this is a new incoming PLOGI, we won't find it.
-                         */
-                        s_id = ntoh24(fh->fh_s_id);
-                        d_id = ntoh24(fh->fh_d_id);
-
-                        rport = lport->tt.rport_lookup(lport, s_id);
-                        if (rport)
-                                lport->tt.rport_recv_req(sp, fp, rport);
-                        else {
-                                rjt_data.fp = NULL;
-                                rjt_data.reason = ELS_RJT_UNAB;
-                                rjt_data.explan = ELS_EXPL_NONE;
-                                lport->tt.seq_els_rsp_send(sp,
-                                                           ELS_LS_RJT,
-                                                           &rjt_data);
-                                fc_frame_free(fp);
-                        }
-                }
+                recv(sp, fp, lport);
         } else {
                 FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
                              fr_eof(fp));
@@ -930,38 +834,61 @@ int fc_lport_reset(struct fc_lport *lport)
 EXPORT_SYMBOL(fc_lport_reset);
 
 /**
- * fc_rport_enter_reset() - Reset the local port
+ * fc_lport_reset_locked() - Reset the local port
  * @lport: Fibre Channel local port to be reset
  *
  * Locking Note: The lport lock is expected to be held before calling
  * this routine.
  */
-static void fc_lport_enter_reset(struct fc_lport *lport)
+static void fc_lport_reset_locked(struct fc_lport *lport)
 {
-        FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
-                     fc_lport_state(lport));
-
-        fc_lport_state_enter(lport, LPORT_ST_RESET);
-
         if (lport->dns_rp)
                 lport->tt.rport_logoff(lport->dns_rp);
 
-        if (lport->ptp_rp) {
-                lport->tt.rport_logoff(lport->ptp_rp);
-                lport->ptp_rp = NULL;
-        }
+        lport->ptp_rp = NULL;
 
         lport->tt.disc_stop(lport);
 
         lport->tt.exch_mgr_reset(lport, 0, 0);
         fc_host_fabric_name(lport->host) = 0;
         fc_host_port_id(lport->host) = 0;
+}
 
+/**
+ * fc_lport_enter_reset() - Reset the local port
+ * @lport: Fibre Channel local port to be reset
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_reset(struct fc_lport *lport)
+{
+        FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
+                     fc_lport_state(lport));
+
+        fc_lport_state_enter(lport, LPORT_ST_RESET);
+        fc_lport_reset_locked(lport);
         if (lport->link_up)
                 fc_lport_enter_flogi(lport);
 }
 
 /**
+ * fc_lport_enter_disabled() - disable the local port
+ * @lport: Fibre Channel local port to be reset
+ *
+ * Locking Note: The lport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_lport_enter_disabled(struct fc_lport *lport)
+{
+        FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
+                     fc_lport_state(lport));
+
+        fc_lport_state_enter(lport, LPORT_ST_DISABLED);
+        fc_lport_reset_locked(lport);
+}
+
+/**
  * fc_lport_error() - Handler for any errors
  * @lport: The fc_lport object
  * @fp: The frame pointer
@@ -992,7 +919,7 @@ static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
                         schedule_delayed_work(&lport->retry_work, delay);
                 } else {
                         switch (lport->state) {
-                        case LPORT_ST_NONE:
+                        case LPORT_ST_DISABLED:
                         case LPORT_ST_READY:
                         case LPORT_ST_RESET:
                         case LPORT_ST_RPN_ID:
@@ -1026,13 +953,13 @@ static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp,
         struct fc_frame_header *fh;
         struct fc_ct_hdr *ct;
 
+        FC_LPORT_DBG(lport, "Received a RFT_ID %s\n", fc_els_resp_type(fp));
+
         if (fp == ERR_PTR(-FC_EX_CLOSED))
                 return;
 
         mutex_lock(&lport->lp_mutex);
 
-        FC_LPORT_DBG(lport, "Received a RFT_ID response\n");
-
         if (lport->state != LPORT_ST_RFT_ID) {
                 FC_LPORT_DBG(lport, "Received a RFT_ID response, but in state "
                              "%s\n", fc_lport_state(lport));
@@ -1080,13 +1007,13 @@ static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
         struct fc_frame_header *fh;
         struct fc_ct_hdr *ct;
 
+        FC_LPORT_DBG(lport, "Received a RPN_ID %s\n", fc_els_resp_type(fp));
+
         if (fp == ERR_PTR(-FC_EX_CLOSED))
                 return;
 
         mutex_lock(&lport->lp_mutex);
 
-        FC_LPORT_DBG(lport, "Received a RPN_ID response\n");
-
         if (lport->state != LPORT_ST_RPN_ID) {
                 FC_LPORT_DBG(lport, "Received a RPN_ID response, but in state "
                              "%s\n", fc_lport_state(lport));
@@ -1132,13 +1059,13 @@ static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
         struct fc_lport *lport = lp_arg;
         u8 op;
 
+        FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
+
         if (fp == ERR_PTR(-FC_EX_CLOSED))
                 return;
 
         mutex_lock(&lport->lp_mutex);
 
-        FC_LPORT_DBG(lport, "Received a SCR response\n");
-
         if (lport->state != LPORT_ST_SCR) {
                 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
                              "%s\n", fc_lport_state(lport));
@@ -1186,7 +1113,7 @@ static void fc_lport_enter_scr(struct fc_lport *lport)
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, NULL, fp, ELS_SCR,
+        if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
                                   fc_lport_scr_resp, lport, lport->e_d_tov))
                 fc_lport_error(lport, fp);
 }
@@ -1227,7 +1154,7 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, NULL, fp, FC_NS_RFT_ID,
+        if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RFT_ID,
                                   fc_lport_rft_id_resp,
                                   lport, lport->e_d_tov))
                 fc_lport_error(lport, fp);
@@ -1256,7 +1183,7 @@ static void fc_lport_enter_rpn_id(struct fc_lport *lport)
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, NULL, fp, FC_NS_RPN_ID,
+        if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RPN_ID,
                                   fc_lport_rpn_id_resp,
                                   lport, lport->e_d_tov))
                 fc_lport_error(lport, fp);
@@ -1275,28 +1202,21 @@ static struct fc_rport_operations fc_lport_rport_ops = {
  */
 static void fc_lport_enter_dns(struct fc_lport *lport)
 {
-        struct fc_rport *rport;
-        struct fc_rport_libfc_priv *rdata;
-        struct fc_disc_port dp;
-
-        dp.ids.port_id = FC_FID_DIR_SERV;
-        dp.ids.port_name = -1;
-        dp.ids.node_name = -1;
-        dp.ids.roles = FC_RPORT_ROLE_UNKNOWN;
-        dp.lp = lport;
+        struct fc_rport_priv *rdata;
 
         FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
                      fc_lport_state(lport));
 
         fc_lport_state_enter(lport, LPORT_ST_DNS);
 
-        rport = lport->tt.rport_create(&dp);
-        if (!rport)
+        mutex_lock(&lport->disc.disc_mutex);
+        rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
+        mutex_unlock(&lport->disc.disc_mutex);
+        if (!rdata)
                 goto err;
 
-        rdata = rport->dd_data;
         rdata->ops = &fc_lport_rport_ops;
-        lport->tt.rport_login(rport);
+        lport->tt.rport_login(rdata);
         return;
 
 err:
@@ -1316,7 +1236,7 @@ static void fc_lport_timeout(struct work_struct *work)
         mutex_lock(&lport->lp_mutex);
 
         switch (lport->state) {
-        case LPORT_ST_NONE:
+        case LPORT_ST_DISABLED:
         case LPORT_ST_READY:
         case LPORT_ST_RESET:
                 WARN_ON(1);
@@ -1360,13 +1280,13 @@ static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
         struct fc_lport *lport = lp_arg;
         u8 op;
 
+        FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
+
         if (fp == ERR_PTR(-FC_EX_CLOSED))
                 return;
 
         mutex_lock(&lport->lp_mutex);
 
-        FC_LPORT_DBG(lport, "Received a LOGO response\n");
-
         if (lport->state != LPORT_ST_LOGO) {
                 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
                              "%s\n", fc_lport_state(lport));
@@ -1382,7 +1302,7 @@ static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
 
         op = fc_frame_payload_op(fp);
         if (op == ELS_LS_ACC)
-                fc_lport_enter_reset(lport);
+                fc_lport_enter_disabled(lport);
         else
                 fc_lport_error(lport, fp);
 
@@ -1415,8 +1335,8 @@ static void fc_lport_enter_logo(struct fc_lport *lport)
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, NULL, fp, ELS_LOGO, fc_lport_logo_resp,
-                                  lport, lport->e_d_tov))
+        if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
+                                  fc_lport_logo_resp, lport, lport->e_d_tov))
                 fc_lport_error(lport, fp);
 }
 
@@ -1442,13 +1362,13 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
         unsigned int e_d_tov;
         u16 mfs;
 
+        FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
+
         if (fp == ERR_PTR(-FC_EX_CLOSED))
                 return;
 
         mutex_lock(&lport->lp_mutex);
 
-        FC_LPORT_DBG(lport, "Received a FLOGI response\n");
-
         if (lport->state != LPORT_ST_FLOGI) {
                 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
                              "%s\n", fc_lport_state(lport));
@@ -1501,14 +1421,6 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
                                 fc_lport_enter_dns(lport);
                         }
                 }
-
-                if (flp) {
-                        csp_flags = ntohs(flp->fl_csp.sp_features);
-                        if ((csp_flags & FC_SP_FT_FPORT) == 0) {
-                                lport->tt.disc_start(fc_lport_disc_callback,
-                                                     lport);
-                        }
-                }
         } else {
                 FC_LPORT_DBG(lport, "Bad FLOGI response\n");
         }
@@ -1539,7 +1451,7 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
         if (!fp)
                 return fc_lport_error(lport, fp);
 
-        if (!lport->tt.elsct_send(lport, NULL, fp, ELS_FLOGI,
+        if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_FLOGI,
                                   fc_lport_flogi_resp, lport, lport->e_d_tov))
                 fc_lport_error(lport, fp);
 }
@@ -1550,7 +1462,7 @@ int fc_lport_config(struct fc_lport *lport)
         INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
         mutex_init(&lport->lp_mutex);
 
-        fc_lport_state_enter(lport, LPORT_ST_NONE);
+        fc_lport_state_enter(lport, LPORT_ST_DISABLED);
 
         fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
         fc_lport_add_fc4_type(lport, FC_TYPE_CT);
@@ -1588,6 +1500,7 @@ int fc_lport_init(struct fc_lport *lport)
         if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
                 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
 
+        INIT_LIST_HEAD(&lport->ema_list);
         return 0;
 }
 EXPORT_SYMBOL(fc_lport_init);
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index 7162385f52eb..03ea6748e7ee 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -57,94 +57,114 @@
 
 struct workqueue_struct *rport_event_queue;
 
-static void fc_rport_enter_plogi(struct fc_rport *);
-static void fc_rport_enter_prli(struct fc_rport *);
-static void fc_rport_enter_rtv(struct fc_rport *);
-static void fc_rport_enter_ready(struct fc_rport *);
-static void fc_rport_enter_logo(struct fc_rport *);
-
-static void fc_rport_recv_plogi_req(struct fc_rport *,
+static void fc_rport_enter_plogi(struct fc_rport_priv *);
+static void fc_rport_enter_prli(struct fc_rport_priv *);
+static void fc_rport_enter_rtv(struct fc_rport_priv *);
+static void fc_rport_enter_ready(struct fc_rport_priv *);
+static void fc_rport_enter_logo(struct fc_rport_priv *);
+static void fc_rport_enter_adisc(struct fc_rport_priv *);
+
+static void fc_rport_recv_plogi_req(struct fc_lport *,
                                     struct fc_seq *, struct fc_frame *);
-static void fc_rport_recv_prli_req(struct fc_rport *,
+static void fc_rport_recv_prli_req(struct fc_rport_priv *,
                                    struct fc_seq *, struct fc_frame *);
-static void fc_rport_recv_prlo_req(struct fc_rport *,
+static void fc_rport_recv_prlo_req(struct fc_rport_priv *,
                                    struct fc_seq *, struct fc_frame *);
-static void fc_rport_recv_logo_req(struct fc_rport *,
+static void fc_rport_recv_logo_req(struct fc_lport *,
                                    struct fc_seq *, struct fc_frame *);
 static void fc_rport_timeout(struct work_struct *);
-static void fc_rport_error(struct fc_rport *, struct fc_frame *);
-static void fc_rport_error_retry(struct fc_rport *, struct fc_frame *);
+static void fc_rport_error(struct fc_rport_priv *, struct fc_frame *);
+static void fc_rport_error_retry(struct fc_rport_priv *, struct fc_frame *);
 static void fc_rport_work(struct work_struct *);
 
 static const char *fc_rport_state_names[] = {
-        [RPORT_ST_NONE] = "None",
         [RPORT_ST_INIT] = "Init",
         [RPORT_ST_PLOGI] = "PLOGI",
         [RPORT_ST_PRLI] = "PRLI",
         [RPORT_ST_RTV] = "RTV",
         [RPORT_ST_READY] = "Ready",
         [RPORT_ST_LOGO] = "LOGO",
+        [RPORT_ST_ADISC] = "ADISC",
+        [RPORT_ST_DELETE] = "Delete",
 };
 
-static void fc_rport_rogue_destroy(struct device *dev)
+/**
+ * fc_rport_lookup() - lookup a remote port by port_id
+ * @lport: Fibre Channel host port instance
+ * @port_id: remote port port_id to match
+ */
+static struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
+                                             u32 port_id)
 {
-        struct fc_rport *rport = dev_to_rport(dev);
-        FC_RPORT_DBG(rport, "Destroying rogue rport\n");
-        kfree(rport);
+        struct fc_rport_priv *rdata;
+
+        list_for_each_entry(rdata, &lport->disc.rports, peers)
+                if (rdata->ids.port_id == port_id &&
+                    rdata->rp_state != RPORT_ST_DELETE)
+                        return rdata;
+        return NULL;
 }
 
-struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp)
+/**
+ * fc_rport_create() - Create a new remote port
+ * @lport:   The local port that the new remote port is for
+ * @port_id: The port ID for the new remote port
+ *
+ * Locking note:  must be called with the disc_mutex held.
+ */
+static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport,
+                                             u32 port_id)
 {
-        struct fc_rport *rport;
-        struct fc_rport_libfc_priv *rdata;
-        rport = kzalloc(sizeof(*rport) + sizeof(*rdata), GFP_KERNEL);
+        struct fc_rport_priv *rdata;
 
-        if (!rport)
-                return NULL;
+        rdata = lport->tt.rport_lookup(lport, port_id);
+        if (rdata)
+                return rdata;
 
-        rdata = RPORT_TO_PRIV(rport);
+        rdata = kzalloc(sizeof(*rdata), GFP_KERNEL);
+        if (!rdata)
+                return NULL;
 
-        rport->dd_data = rdata;
-        rport->port_id = dp->ids.port_id;
-        rport->port_name = dp->ids.port_name;
-        rport->node_name = dp->ids.node_name;
-        rport->roles = dp->ids.roles;
-        rport->maxframe_size = FC_MIN_MAX_PAYLOAD;
-        /*
-         * Note: all this libfc rogue rport code will be removed for
-         * upstream so it fine that this is really ugly and hacky right now.
-         */
-        device_initialize(&rport->dev);
-        rport->dev.release = fc_rport_rogue_destroy;
+        rdata->ids.node_name = -1;
+        rdata->ids.port_name = -1;
+        rdata->ids.port_id = port_id;
+        rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
 
+        kref_init(&rdata->kref);
         mutex_init(&rdata->rp_mutex);
-        rdata->local_port = dp->lp;
-        rdata->trans_state = FC_PORTSTATE_ROGUE;
+        rdata->local_port = lport;
         rdata->rp_state = RPORT_ST_INIT;
         rdata->event = RPORT_EV_NONE;
         rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
-        rdata->ops = NULL;
-        rdata->e_d_tov = dp->lp->e_d_tov;
-        rdata->r_a_tov = dp->lp->r_a_tov;
+        rdata->e_d_tov = lport->e_d_tov;
+        rdata->r_a_tov = lport->r_a_tov;
+        rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
         INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout);
         INIT_WORK(&rdata->event_work, fc_rport_work);
-        /*
-         * For good measure, but not necessary as we should only
-         * add REAL rport to the lport list.
-         */
-        INIT_LIST_HEAD(&rdata->peers);
+        if (port_id != FC_FID_DIR_SERV)
+                list_add(&rdata->peers, &lport->disc.rports);
+        return rdata;
+}
+
+/**
+ * fc_rport_destroy() - free a remote port after last reference is released.
+ * @kref: pointer to kref inside struct fc_rport_priv
+ */
+static void fc_rport_destroy(struct kref *kref)
+{
+        struct fc_rport_priv *rdata;
 
-        return rport;
+        rdata = container_of(kref, struct fc_rport_priv, kref);
+        kfree(rdata);
 }
 
 /**
  * fc_rport_state() - return a string for the state the rport is in
- * @rport: The rport whose state we want to get a string for
+ * @rdata: remote port private data
  */
-static const char *fc_rport_state(struct fc_rport *rport)
+static const char *fc_rport_state(struct fc_rport_priv *rdata)
 {
         const char *cp;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
 
         cp = fc_rport_state_names[rdata->rp_state];
         if (!cp)
@@ -191,15 +211,14 @@ static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
 
 /**
  * fc_rport_state_enter() - Change the rport's state
- * @rport: The rport whose state should change
+ * @rdata: The rport whose state should change
  * @new: The new state of the rport
  *
  * Locking Note: Called with the rport lock held
  */
-static void fc_rport_state_enter(struct fc_rport *rport,
+static void fc_rport_state_enter(struct fc_rport_priv *rdata,
                                  enum fc_rport_state new)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         if (rdata->rp_state != new)
                 rdata->retries = 0;
         rdata->rp_state = new;
@@ -208,147 +227,187 @@ static void fc_rport_state_enter(struct fc_rport *rport,
 static void fc_rport_work(struct work_struct *work)
 {
         u32 port_id;
-        struct fc_rport_libfc_priv *rdata =
-                container_of(work, struct fc_rport_libfc_priv, event_work);
+        struct fc_rport_priv *rdata =
+                container_of(work, struct fc_rport_priv, event_work);
+        struct fc_rport_libfc_priv *rp;
         enum fc_rport_event event;
-        enum fc_rport_trans_state trans_state;
         struct fc_lport *lport = rdata->local_port;
         struct fc_rport_operations *rport_ops;
-        struct fc_rport *rport = PRIV_TO_RPORT(rdata);
+        struct fc_rport_identifiers ids;
+        struct fc_rport *rport;
 
         mutex_lock(&rdata->rp_mutex);
         event = rdata->event;
         rport_ops = rdata->ops;
+        rport = rdata->rport;
 
-        if (event == RPORT_EV_CREATED) {
-                struct fc_rport *new_rport;
-                struct fc_rport_libfc_priv *new_rdata;
-                struct fc_rport_identifiers ids;
+        FC_RPORT_DBG(rdata, "work event %u\n", event);
 
-                ids.port_id = rport->port_id;
-                ids.roles = rport->roles;
-                ids.port_name = rport->port_name;
-                ids.node_name = rport->node_name;
+        switch (event) {
+        case RPORT_EV_READY:
+                ids = rdata->ids;
+                rdata->event = RPORT_EV_NONE;
+                kref_get(&rdata->kref);
+                mutex_unlock(&rdata->rp_mutex);
 
+                if (!rport)
+                        rport = fc_remote_port_add(lport->host, 0, &ids);
+                if (!rport) {
+                        FC_RPORT_DBG(rdata, "Failed to add the rport\n");
+                        lport->tt.rport_logoff(rdata);
+                        kref_put(&rdata->kref, lport->tt.rport_destroy);
+                        return;
+                }
+                mutex_lock(&rdata->rp_mutex);
+                if (rdata->rport)
+                        FC_RPORT_DBG(rdata, "rport already allocated\n");
+                rdata->rport = rport;
+                rport->maxframe_size = rdata->maxframe_size;
+                rport->supported_classes = rdata->supported_classes;
+
+                rp = rport->dd_data;
+                rp->local_port = lport;
+                rp->rp_state = rdata->rp_state;
+                rp->flags = rdata->flags;
+                rp->e_d_tov = rdata->e_d_tov;
+                rp->r_a_tov = rdata->r_a_tov;
                 mutex_unlock(&rdata->rp_mutex);
 
-                new_rport = fc_remote_port_add(lport->host, 0, &ids);
-                if (new_rport) {
-                        /*
-                         * Switch from the rogue rport to the rport
-                         * returned by the FC class.
-                         */
-                        new_rport->maxframe_size = rport->maxframe_size;
-
-                        new_rdata = new_rport->dd_data;
-                        new_rdata->e_d_tov = rdata->e_d_tov;
-                        new_rdata->r_a_tov = rdata->r_a_tov;
-                        new_rdata->ops = rdata->ops;
-                        new_rdata->local_port = rdata->local_port;
-                        new_rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
-                        new_rdata->trans_state = FC_PORTSTATE_REAL;
-                        mutex_init(&new_rdata->rp_mutex);
-                        INIT_DELAYED_WORK(&new_rdata->retry_work,
-                                          fc_rport_timeout);
-                        INIT_LIST_HEAD(&new_rdata->peers);
-                        INIT_WORK(&new_rdata->event_work, fc_rport_work);
-
-                        fc_rport_state_enter(new_rport, RPORT_ST_READY);
-                } else {
-                        printk(KERN_WARNING "libfc: Failed to allocate "
-                               " memory for rport (%6x)\n", ids.port_id);
-                        event = RPORT_EV_FAILED;
+                if (rport_ops && rport_ops->event_callback) {
+                        FC_RPORT_DBG(rdata, "callback ev %d\n", event);
+                        rport_ops->event_callback(lport, rdata, event);
                 }
-                if (rport->port_id != FC_FID_DIR_SERV)
-                        if (rport_ops->event_callback)
-                                rport_ops->event_callback(lport, rport,
-                                                          RPORT_EV_FAILED);
-                put_device(&rport->dev);
-                rport = new_rport;
-                rdata = new_rport->dd_data;
-                if (rport_ops->event_callback)
-                        rport_ops->event_callback(lport, rport, event);
-        } else if ((event == RPORT_EV_FAILED) ||
-                   (event == RPORT_EV_LOGO) ||
-                   (event == RPORT_EV_STOP)) {
-                trans_state = rdata->trans_state;
+                kref_put(&rdata->kref, lport->tt.rport_destroy);
+                break;
+
+        case RPORT_EV_FAILED:
+        case RPORT_EV_LOGO:
+        case RPORT_EV_STOP:
+                port_id = rdata->ids.port_id;
                 mutex_unlock(&rdata->rp_mutex);
-                if (rport_ops->event_callback)
-                        rport_ops->event_callback(lport, rport, event);
-                if (trans_state == FC_PORTSTATE_ROGUE)
-                        put_device(&rport->dev);
-                else {
-                        port_id = rport->port_id;
+
+                if (port_id != FC_FID_DIR_SERV) {
+                        mutex_lock(&lport->disc.disc_mutex);
+                        list_del(&rdata->peers);
+                        mutex_unlock(&lport->disc.disc_mutex);
+                }
+
+                if (rport_ops && rport_ops->event_callback) {
+                        FC_RPORT_DBG(rdata, "callback ev %d\n", event);
+                        rport_ops->event_callback(lport, rdata, event);
+                }
+                cancel_delayed_work_sync(&rdata->retry_work);
+
+                /*
+                 * Reset any outstanding exchanges before freeing rport.
+                 */
+                lport->tt.exch_mgr_reset(lport, 0, port_id);
+                lport->tt.exch_mgr_reset(lport, port_id, 0);
+
+                if (rport) {
+                        rp = rport->dd_data;
+                        rp->rp_state = RPORT_ST_DELETE;
+                        mutex_lock(&rdata->rp_mutex);
+                        rdata->rport = NULL;
+                        mutex_unlock(&rdata->rp_mutex);
                         fc_remote_port_delete(rport);
-                        lport->tt.exch_mgr_reset(lport, 0, port_id);
-                        lport->tt.exch_mgr_reset(lport, port_id, 0);
                 }
-        } else
+                kref_put(&rdata->kref, lport->tt.rport_destroy);
+                break;
+
+        default:
                 mutex_unlock(&rdata->rp_mutex);
+                break;
+        }
 }
 
 /**
  * fc_rport_login() - Start the remote port login state machine
- * @rport: Fibre Channel remote port
+ * @rdata: private remote port
  *
  * Locking Note: Called without the rport lock held. This
  * function will hold the rport lock, call an _enter_*
  * function and then unlock the rport.
+ *
+ * This indicates the intent to be logged into the remote port.
+ * If it appears we are already logged in, ADISC is used to verify
+ * the setup.
  */
-int fc_rport_login(struct fc_rport *rport)
+int fc_rport_login(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-
         mutex_lock(&rdata->rp_mutex);
 
-        FC_RPORT_DBG(rport, "Login to port\n");
-
-        fc_rport_enter_plogi(rport);
-
+        switch (rdata->rp_state) {
+        case RPORT_ST_READY:
+                FC_RPORT_DBG(rdata, "ADISC port\n");
+                fc_rport_enter_adisc(rdata);
+                break;
+        default:
+                FC_RPORT_DBG(rdata, "Login to port\n");
+                fc_rport_enter_plogi(rdata);
+                break;
+        }
         mutex_unlock(&rdata->rp_mutex);
 
         return 0;
 }
 
 /**
+ * fc_rport_enter_delete() - schedule a remote port to be deleted.
+ * @rdata: private remote port
+ * @event: event to report as the reason for deletion
+ *
+ * Locking Note: Called with the rport lock held.
+ *
+ * Allow state change into DELETE only once.
+ *
+ * Call queue_work only if there's no event already pending.
+ * Set the new event so that the old pending event will not occur.
+ * Since we have the mutex, even if fc_rport_work() is already started,
+ * it'll see the new event.
+ */
+static void fc_rport_enter_delete(struct fc_rport_priv *rdata,
+                                  enum fc_rport_event event)
+{
+        if (rdata->rp_state == RPORT_ST_DELETE)
+                return;
+
+        FC_RPORT_DBG(rdata, "Delete port\n");
+
+        fc_rport_state_enter(rdata, RPORT_ST_DELETE);
+
+        if (rdata->event == RPORT_EV_NONE)
+                queue_work(rport_event_queue, &rdata->event_work);
+        rdata->event = event;
+}
+
+/**
  * fc_rport_logoff() - Logoff and remove an rport
- * @rport: Fibre Channel remote port to be removed
+ * @rdata: private remote port
  *
  * Locking Note: Called without the rport lock held. This
  * function will hold the rport lock, call an _enter_*
  * function and then unlock the rport.
  */
-int fc_rport_logoff(struct fc_rport *rport)
+int fc_rport_logoff(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-
         mutex_lock(&rdata->rp_mutex);
 
-        FC_RPORT_DBG(rport, "Remove port\n");
+        FC_RPORT_DBG(rdata, "Remove port\n");
 
-        if (rdata->rp_state == RPORT_ST_NONE) {
-                FC_RPORT_DBG(rport, "Port in NONE state, not removing\n");
+        if (rdata->rp_state == RPORT_ST_DELETE) {
+                FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n");
                 mutex_unlock(&rdata->rp_mutex);
                 goto out;
         }
 
-        fc_rport_enter_logo(rport);
+        fc_rport_enter_logo(rdata);
 
         /*
-         * Change the state to NONE so that we discard
+         * Change the state to Delete so that we discard
          * the response.
          */
-        fc_rport_state_enter(rport, RPORT_ST_NONE);
-
-        mutex_unlock(&rdata->rp_mutex);
-
-        cancel_delayed_work_sync(&rdata->retry_work);
-
-        mutex_lock(&rdata->rp_mutex);
-
-        rdata->event = RPORT_EV_STOP;
-        queue_work(rport_event_queue, &rdata->event_work);
-
+        fc_rport_enter_delete(rdata, RPORT_EV_STOP);
         mutex_unlock(&rdata->rp_mutex);
 
 out:
@@ -357,26 +416,25 @@ out:
 
 /**
  * fc_rport_enter_ready() - The rport is ready
- * @rport: Fibre Channel remote port that is ready
+ * @rdata: private remote port
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
  */
-static void fc_rport_enter_ready(struct fc_rport *rport)
+static void fc_rport_enter_ready(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-
-        fc_rport_state_enter(rport, RPORT_ST_READY);
+        fc_rport_state_enter(rdata, RPORT_ST_READY);
 
-        FC_RPORT_DBG(rport, "Port is Ready\n");
+        FC_RPORT_DBG(rdata, "Port is Ready\n");
 
-        rdata->event = RPORT_EV_CREATED;
-        queue_work(rport_event_queue, &rdata->event_work);
+        if (rdata->event == RPORT_EV_NONE)
+                queue_work(rport_event_queue, &rdata->event_work);
+        rdata->event = RPORT_EV_READY;
 }
 
 /**
  * fc_rport_timeout() - Handler for the retry_work timer.
- * @work: The work struct of the fc_rport_libfc_priv
+ * @work: The work struct of the fc_rport_priv
  *
  * Locking Note: Called without the rport lock held. This
  * function will hold the rport lock, call an _enter_*
@@ -384,63 +442,63 @@ static void fc_rport_enter_ready(struct fc_rport *rport)
  */
 static void fc_rport_timeout(struct work_struct *work)
 {
-        struct fc_rport_libfc_priv *rdata =
-                container_of(work, struct fc_rport_libfc_priv, retry_work.work);
-        struct fc_rport *rport = PRIV_TO_RPORT(rdata);
+        struct fc_rport_priv *rdata =
+                container_of(work, struct fc_rport_priv, retry_work.work);
 
         mutex_lock(&rdata->rp_mutex);
 
         switch (rdata->rp_state) {
         case RPORT_ST_PLOGI:
-                fc_rport_enter_plogi(rport);
+                fc_rport_enter_plogi(rdata);
                 break;
         case RPORT_ST_PRLI:
-                fc_rport_enter_prli(rport);
+                fc_rport_enter_prli(rdata);
                 break;
         case RPORT_ST_RTV:
-                fc_rport_enter_rtv(rport);
+                fc_rport_enter_rtv(rdata);
                 break;
         case RPORT_ST_LOGO:
-                fc_rport_enter_logo(rport);
+                fc_rport_enter_logo(rdata);
+                break;
+        case RPORT_ST_ADISC:
+                fc_rport_enter_adisc(rdata);
                 break;
         case RPORT_ST_READY:
         case RPORT_ST_INIT:
-        case RPORT_ST_NONE:
+        case RPORT_ST_DELETE:
                 break;
         }
 
         mutex_unlock(&rdata->rp_mutex);
-        put_device(&rport->dev);
 }
 
 /**
  * fc_rport_error() - Error handler, called once retries have been exhausted
- * @rport: The fc_rport object
+ * @rdata: private remote port
  * @fp: The frame pointer
  *
  * Locking Note: The rport lock is expected to be held before
  * calling this routine
  */
-static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp)
+static void fc_rport_error(struct fc_rport_priv *rdata, struct fc_frame *fp)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-
-        FC_RPORT_DBG(rport, "Error %ld in state %s, retries %d\n",
-                     PTR_ERR(fp), fc_rport_state(rport), rdata->retries);
+        FC_RPORT_DBG(rdata, "Error %ld in state %s, retries %d\n",
+                     IS_ERR(fp) ? -PTR_ERR(fp) : 0,
+                     fc_rport_state(rdata), rdata->retries);
 
         switch (rdata->rp_state) {
         case RPORT_ST_PLOGI:
-        case RPORT_ST_PRLI:
         case RPORT_ST_LOGO:
-                rdata->event = RPORT_EV_FAILED;
-                fc_rport_state_enter(rport, RPORT_ST_NONE);
-                queue_work(rport_event_queue,
-                           &rdata->event_work);
+                fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
                 break;
         case RPORT_ST_RTV:
-                fc_rport_enter_ready(rport);
+                fc_rport_enter_ready(rdata);
                 break;
-        case RPORT_ST_NONE:
+        case RPORT_ST_PRLI:
+        case RPORT_ST_ADISC:
+                fc_rport_enter_logo(rdata);
+                break;
+        case RPORT_ST_DELETE:
         case RPORT_ST_READY:
         case RPORT_ST_INIT:
                 break;
@@ -449,7 +507,7 @@ static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp)
 
 /**
  * fc_rport_error_retry() - Error handler when retries are desired
- * @rport: The fc_rport object
+ * @rdata: private remote port data
  * @fp: The frame pointer
  *
  * If the error was an exchange timeout retry immediately,
@@ -458,45 +516,43 @@ static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp)
  * Locking Note: The rport lock is expected to be held before
  * calling this routine
  */
-static void fc_rport_error_retry(struct fc_rport *rport, struct fc_frame *fp)
+static void fc_rport_error_retry(struct fc_rport_priv *rdata,
+                                 struct fc_frame *fp)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         unsigned long delay = FC_DEF_E_D_TOV;
 
         /* make sure this isn't an FC_EX_CLOSED error, never retry those */
         if (PTR_ERR(fp) == -FC_EX_CLOSED)
-                return fc_rport_error(rport, fp);
+                return fc_rport_error(rdata, fp);
 
         if (rdata->retries < rdata->local_port->max_rport_retry_count) {
-                FC_RPORT_DBG(rport, "Error %ld in state %s, retrying\n",
-                             PTR_ERR(fp), fc_rport_state(rport));
+                FC_RPORT_DBG(rdata, "Error %ld in state %s, retrying\n",
+                             PTR_ERR(fp), fc_rport_state(rdata));
                 rdata->retries++;
                 /* no additional delay on exchange timeouts */
                 if (PTR_ERR(fp) == -FC_EX_TIMEOUT)
                         delay = 0;
-                get_device(&rport->dev);
                 schedule_delayed_work(&rdata->retry_work, delay);
                 return;
         }
 
-        return fc_rport_error(rport, fp);
+        return fc_rport_error(rdata, fp);
 }
 
 /**
  * fc_rport_plogi_recv_resp() - Handle incoming ELS PLOGI response
  * @sp: current sequence in the PLOGI exchange
  * @fp: response frame
- * @rp_arg: Fibre Channel remote port
+ * @rdata_arg: private remote port data
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
  * and then unlock the rport.
  */
 static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
-                                void *rp_arg)
+                                void *rdata_arg)
 {
-        struct fc_rport *rport = rp_arg;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
+        struct fc_rport_priv *rdata = rdata_arg;
         struct fc_lport *lport = rdata->local_port;
         struct fc_els_flogi *plp = NULL;
         unsigned int tov;
@@ -506,26 +562,26 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
 
         mutex_lock(&rdata->rp_mutex);
 
-        FC_RPORT_DBG(rport, "Received a PLOGI response\n");
+        FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp));
 
         if (rdata->rp_state != RPORT_ST_PLOGI) {
-                FC_RPORT_DBG(rport, "Received a PLOGI response, but in state "
-                             "%s\n", fc_rport_state(rport));
+                FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state "
+                             "%s\n", fc_rport_state(rdata));
                 if (IS_ERR(fp))
                         goto err;
                 goto out;
         }
 
         if (IS_ERR(fp)) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 goto err;
         }
 
         op = fc_frame_payload_op(fp);
         if (op == ELS_LS_ACC &&
             (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) {
-                rport->port_name = get_unaligned_be64(&plp->fl_wwpn);
-                rport->node_name = get_unaligned_be64(&plp->fl_wwnn);
+                rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn);
+                rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn);
 
                 tov = ntohl(plp->fl_csp.sp_e_d_tov);
                 if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR)
@@ -537,75 +593,64 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
                 if (cssp_seq < csp_seq)
                         csp_seq = cssp_seq;
                 rdata->max_seq = csp_seq;
-                rport->maxframe_size =
-                        fc_plogi_get_maxframe(plp, lport->mfs);
-
-                /*
-                 * If the rport is one of the well known addresses
-                 * we skip PRLI and RTV and go straight to READY.
-                 */
-                if (rport->port_id >= FC_FID_DOM_MGR)
-                        fc_rport_enter_ready(rport);
-                else
-                        fc_rport_enter_prli(rport);
+                rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs);
+                fc_rport_enter_prli(rdata);
         } else
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
 
 out:
         fc_frame_free(fp);
 err:
         mutex_unlock(&rdata->rp_mutex);
-        put_device(&rport->dev);
+        kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
 }
 
 /**
  * fc_rport_enter_plogi() - Send Port Login (PLOGI) request to peer
- * @rport: Fibre Channel remote port to send PLOGI to
+ * @rdata: private remote port data
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
  */
-static void fc_rport_enter_plogi(struct fc_rport *rport)
+static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
         struct fc_frame *fp;
 
-        FC_RPORT_DBG(rport, "Port entered PLOGI state from %s state\n",
-                     fc_rport_state(rport));
+        FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n",
+                     fc_rport_state(rdata));
 
-        fc_rport_state_enter(rport, RPORT_ST_PLOGI);
+        fc_rport_state_enter(rdata, RPORT_ST_PLOGI);
 
-        rport->maxframe_size = FC_MIN_MAX_PAYLOAD;
+        rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
         fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
         if (!fp) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 return;
         }
         rdata->e_d_tov = lport->e_d_tov;
 
-        if (!lport->tt.elsct_send(lport, rport, fp, ELS_PLOGI,
-                                  fc_rport_plogi_resp, rport, lport->e_d_tov))
-                fc_rport_error_retry(rport, fp);
+        if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI,
+                                  fc_rport_plogi_resp, rdata, lport->e_d_tov))
+                fc_rport_error_retry(rdata, fp);
         else
-                get_device(&rport->dev);
+                kref_get(&rdata->kref);
 }
 
 /**
  * fc_rport_prli_resp() - Process Login (PRLI) response handler
  * @sp: current sequence in the PRLI exchange
  * @fp: response frame
- * @rp_arg: Fibre Channel remote port
+ * @rdata_arg: private remote port data
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
  * and then unlock the rport.
  */
 static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
-                               void *rp_arg)
+                               void *rdata_arg)
 {
-        struct fc_rport *rport = rp_arg;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
+        struct fc_rport_priv *rdata = rdata_arg;
         struct {
                 struct fc_els_prli prli;
                 struct fc_els_spp spp;
@@ -616,21 +661,24 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
 
         mutex_lock(&rdata->rp_mutex);
 
-        FC_RPORT_DBG(rport, "Received a PRLI response\n");
+        FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp));
 
         if (rdata->rp_state != RPORT_ST_PRLI) {
-                FC_RPORT_DBG(rport, "Received a PRLI response, but in state "
-                             "%s\n", fc_rport_state(rport));
+                FC_RPORT_DBG(rdata, "Received a PRLI response, but in state "
+                             "%s\n", fc_rport_state(rdata));
                 if (IS_ERR(fp))
                         goto err;
                 goto out;
         }
 
         if (IS_ERR(fp)) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 goto err;
         }
 
+        /* reinitialize remote port roles */
+        rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
+
         op = fc_frame_payload_op(fp);
         if (op == ELS_LS_ACC) {
                 pp = fc_frame_payload_get(fp, sizeof(*pp));
@@ -640,90 +688,82 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
                                 rdata->flags |= FC_RP_FLAGS_RETRY;
                 }
 
-                rport->supported_classes = FC_COS_CLASS3;
+                rdata->supported_classes = FC_COS_CLASS3;
                 if (fcp_parm & FCP_SPPF_INIT_FCN)
                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
                 if (fcp_parm & FCP_SPPF_TARG_FCN)
                         roles |= FC_RPORT_ROLE_FCP_TARGET;
 
-                rport->roles = roles;
-                fc_rport_enter_rtv(rport);
+                rdata->ids.roles = roles;
+                fc_rport_enter_rtv(rdata);
 
         } else {
-                FC_RPORT_DBG(rport, "Bad ELS response for PRLI command\n");
-                rdata->event = RPORT_EV_FAILED;
-                fc_rport_state_enter(rport, RPORT_ST_NONE);
-                queue_work(rport_event_queue, &rdata->event_work);
+                FC_RPORT_DBG(rdata, "Bad ELS response for PRLI command\n");
+                fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
         }
 
 out:
         fc_frame_free(fp);
 err:
         mutex_unlock(&rdata->rp_mutex);
-        put_device(&rport->dev);
+        kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
 }
 
 /**
  * fc_rport_logo_resp() - Logout (LOGO) response handler
  * @sp: current sequence in the LOGO exchange
  * @fp: response frame
- * @rp_arg: Fibre Channel remote port
+ * @rdata_arg: private remote port data
  *
  * Locking Note: This function will be called without the rport lock
  * held, but it will lock, call an _enter_* function or fc_rport_error
  * and then unlock the rport.
  */
 static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
-                               void *rp_arg)
+                               void *rdata_arg)
 {
-        struct fc_rport *rport = rp_arg;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
+        struct fc_rport_priv *rdata = rdata_arg;
         u8 op;
 
         mutex_lock(&rdata->rp_mutex);
 
-        FC_RPORT_DBG(rport, "Received a LOGO response\n");
+        FC_RPORT_DBG(rdata, "Received a LOGO %s\n", fc_els_resp_type(fp));
 
         if (rdata->rp_state != RPORT_ST_LOGO) {
-                FC_RPORT_DBG(rport, "Received a LOGO response, but in state "
-                             "%s\n", fc_rport_state(rport));
+                FC_RPORT_DBG(rdata, "Received a LOGO response, but in state "
+                             "%s\n", fc_rport_state(rdata));
                 if (IS_ERR(fp))
                         goto err;
                 goto out;
         }
 
         if (IS_ERR(fp)) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 goto err;
         }
 
         op = fc_frame_payload_op(fp);
-        if (op == ELS_LS_ACC) {
-                fc_rport_enter_rtv(rport);
-        } else {
-                FC_RPORT_DBG(rport, "Bad ELS response for LOGO command\n");
-                rdata->event = RPORT_EV_LOGO;
-                fc_rport_state_enter(rport, RPORT_ST_NONE);
-                queue_work(rport_event_queue, &rdata->event_work);
-        }
+        if (op != ELS_LS_ACC)
+                FC_RPORT_DBG(rdata, "Bad ELS response op %x for LOGO command\n",
+                             op);
+        fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
 
 out:
         fc_frame_free(fp);
 err:
         mutex_unlock(&rdata->rp_mutex);
-        put_device(&rport->dev);
+        kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
 }
 
 /**
  * fc_rport_enter_prli() - Send Process Login (PRLI) request to peer
- * @rport: Fibre Channel remote port to send PRLI to
+ * @rdata: private remote port data
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
  */
-static void fc_rport_enter_prli(struct fc_rport *rport)
+static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
         struct {
                 struct fc_els_prli prli;
@@ -731,29 +771,38 @@ static void fc_rport_enter_prli(struct fc_rport *rport)
         } *pp;
         struct fc_frame *fp;
 
-        FC_RPORT_DBG(rport, "Port entered PRLI state from %s state\n",
-                     fc_rport_state(rport));
+        /*
+         * If the rport is one of the well known addresses
+         * we skip PRLI and RTV and go straight to READY.
+         */
+        if (rdata->ids.port_id >= FC_FID_DOM_MGR) {
+                fc_rport_enter_ready(rdata);
+                return;
+        }
+
+        FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n",
+                     fc_rport_state(rdata));
 
-        fc_rport_state_enter(rport, RPORT_ST_PRLI);
+        fc_rport_state_enter(rdata, RPORT_ST_PRLI);
 
         fp = fc_frame_alloc(lport, sizeof(*pp));
         if (!fp) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, rport, fp, ELS_PRLI,
-                                  fc_rport_prli_resp, rport, lport->e_d_tov))
-                fc_rport_error_retry(rport, fp);
+        if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PRLI,
+                                  fc_rport_prli_resp, rdata, lport->e_d_tov))
+                fc_rport_error_retry(rdata, fp);
         else
-                get_device(&rport->dev);
+                kref_get(&rdata->kref);
 }
 
 /**
  * fc_rport_els_rtv_resp() - Request Timeout Value response handler
  * @sp: current sequence in the RTV exchange
  * @fp: response frame
- * @rp_arg: Fibre Channel remote port
+ * @rdata_arg: private remote port data
  *
  * Many targets don't seem to support this.
  *
@@ -762,26 +811,25 @@ static void fc_rport_enter_prli(struct fc_rport *rport)
  * and then unlock the rport.
  */
 static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
-                              void *rp_arg)
+                              void *rdata_arg)
 {
-        struct fc_rport *rport = rp_arg;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
+        struct fc_rport_priv *rdata = rdata_arg;
         u8 op;
 
         mutex_lock(&rdata->rp_mutex);
 
-        FC_RPORT_DBG(rport, "Received a RTV response\n");
+        FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp));
 
         if (rdata->rp_state != RPORT_ST_RTV) {
-                FC_RPORT_DBG(rport, "Received a RTV response, but in state "
-                             "%s\n", fc_rport_state(rport));
+                FC_RPORT_DBG(rdata, "Received a RTV response, but in state "
+                             "%s\n", fc_rport_state(rdata));
                 if (IS_ERR(fp))
                         goto err;
                 goto out;
         }
 
         if (IS_ERR(fp)) {
-                fc_rport_error(rport, fp);
+                fc_rport_error(rdata, fp);
                 goto err;
         }
 
@@ -807,184 +855,376 @@ static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
                 }
         }
 
-        fc_rport_enter_ready(rport);
+        fc_rport_enter_ready(rdata);
 
 out:
         fc_frame_free(fp);
 err:
         mutex_unlock(&rdata->rp_mutex);
-        put_device(&rport->dev);
+        kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
 }
 
 /**
  * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request to peer
- * @rport: Fibre Channel remote port to send RTV to
+ * @rdata: private remote port data
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
  */
-static void fc_rport_enter_rtv(struct fc_rport *rport)
+static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
 {
         struct fc_frame *fp;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
 
-        FC_RPORT_DBG(rport, "Port entered RTV state from %s state\n",
-                     fc_rport_state(rport));
+        FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n",
+                     fc_rport_state(rdata));
 
-        fc_rport_state_enter(rport, RPORT_ST_RTV);
+        fc_rport_state_enter(rdata, RPORT_ST_RTV);
 
         fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv));
         if (!fp) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, rport, fp, ELS_RTV,
-                                     fc_rport_rtv_resp, rport, lport->e_d_tov))
-                fc_rport_error_retry(rport, fp);
+        if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV,
+                                     fc_rport_rtv_resp, rdata, lport->e_d_tov))
+                fc_rport_error_retry(rdata, fp);
         else
-                get_device(&rport->dev);
+                kref_get(&rdata->kref);
 }
 
 /**
  * fc_rport_enter_logo() - Send Logout (LOGO) request to peer
- * @rport: Fibre Channel remote port to send LOGO to
+ * @rdata: private remote port data
  *
  * Locking Note: The rport lock is expected to be held before calling
  * this routine.
  */
-static void fc_rport_enter_logo(struct fc_rport *rport)
+static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
         struct fc_frame *fp;
 
-        FC_RPORT_DBG(rport, "Port entered LOGO state from %s state\n",
-                     fc_rport_state(rport));
+        FC_RPORT_DBG(rdata, "Port entered LOGO state from %s state\n",
+                     fc_rport_state(rdata));
 
-        fc_rport_state_enter(rport, RPORT_ST_LOGO);
+        fc_rport_state_enter(rdata, RPORT_ST_LOGO);
 
         fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
         if (!fp) {
-                fc_rport_error_retry(rport, fp);
+                fc_rport_error_retry(rdata, fp);
                 return;
         }
 
-        if (!lport->tt.elsct_send(lport, rport, fp, ELS_LOGO,
-                                  fc_rport_logo_resp, rport, lport->e_d_tov))
-                fc_rport_error_retry(rport, fp);
+        if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
+                                  fc_rport_logo_resp, rdata, lport->e_d_tov))
+                fc_rport_error_retry(rdata, fp);
         else
-                get_device(&rport->dev);
+                kref_get(&rdata->kref);
 }
 
-
 /**
- * fc_rport_recv_req() - Receive a request from a rport
- * @sp: current sequence in the PLOGI exchange
+ * fc_rport_els_adisc_resp() - Address Discovery response handler
+ * @sp: current sequence in the ADISC exchange
  * @fp: response frame
- * @rp_arg: Fibre Channel remote port
+ * @rdata_arg: remote port private.
  *
- * Locking Note: Called without the rport lock held. This
- * function will hold the rport lock, call an _enter_*
- * function and then unlock the rport.
+ * Locking Note: This function will be called without the rport lock
+ * held, but it will lock, call an _enter_* function or fc_rport_error
+ * and then unlock the rport.
  */
-void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
-                       struct fc_rport *rport)
+static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
+                              void *rdata_arg)
+{
+        struct fc_rport_priv *rdata = rdata_arg;
+        struct fc_els_adisc *adisc;
+        u8 op;
+
+        mutex_lock(&rdata->rp_mutex);
+
+        FC_RPORT_DBG(rdata, "Received a ADISC response\n");
+
+        if (rdata->rp_state != RPORT_ST_ADISC) {
+                FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n",
+                             fc_rport_state(rdata));
+                if (IS_ERR(fp))
+                        goto err;
+                goto out;
+        }
+
+        if (IS_ERR(fp)) {
+                fc_rport_error(rdata, fp);
+                goto err;
+        }
+
+        /*
+         * If address verification failed.  Consider us logged out of the rport.
+         * Since the rport is still in discovery, we want to be
+         * logged in, so go to PLOGI state.  Otherwise, go back to READY.
+         */
+        op = fc_frame_payload_op(fp);
+        adisc = fc_frame_payload_get(fp, sizeof(*adisc));
+        if (op != ELS_LS_ACC || !adisc ||
+            ntoh24(adisc->adisc_port_id) != rdata->ids.port_id ||
+            get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name ||
+            get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) {
+                FC_RPORT_DBG(rdata, "ADISC error or mismatch\n");
+                fc_rport_enter_plogi(rdata);
+        } else {
+                FC_RPORT_DBG(rdata, "ADISC OK\n");
+                fc_rport_enter_ready(rdata);
+        }
+out:
+        fc_frame_free(fp);
+err:
+        mutex_unlock(&rdata->rp_mutex);
+        kref_put(&rdata->kref, rdata->local_port->tt.rport_destroy);
+}
+
+/**
+ * fc_rport_enter_adisc() - Send Address Discover (ADISC) request to peer
+ * @rdata: remote port private data
+ *
+ * Locking Note: The rport lock is expected to be held before calling
+ * this routine.
+ */
+static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
+        struct fc_frame *fp;
+
+        FC_RPORT_DBG(rdata, "sending ADISC from %s state\n",
+                     fc_rport_state(rdata));
 
+        fc_rport_state_enter(rdata, RPORT_ST_ADISC);
+
+        fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc));
+        if (!fp) {
+                fc_rport_error_retry(rdata, fp);
+                return;
+        }
+        if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC,
+                                  fc_rport_adisc_resp, rdata, lport->e_d_tov))
+                fc_rport_error_retry(rdata, fp);
+        else
+                kref_get(&rdata->kref);
+}
+
+/**
+ * fc_rport_recv_adisc_req() - Handle incoming Address Discovery (ADISC) Request
+ * @rdata: remote port private
+ * @sp: current sequence in the ADISC exchange
+ * @in_fp: ADISC request frame
+ *
+ * Locking Note:  Called with the lport and rport locks held.
+ */
+static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
+                                    struct fc_seq *sp, struct fc_frame *in_fp)
+{
+        struct fc_lport *lport = rdata->local_port;
+        struct fc_frame *fp;
+        struct fc_exch *ep = fc_seq_exch(sp);
+        struct fc_els_adisc *adisc;
+        struct fc_seq_els_data rjt_data;
+        u32 f_ctl;
+
+        FC_RPORT_DBG(rdata, "Received ADISC request\n");
+
+        adisc = fc_frame_payload_get(in_fp, sizeof(*adisc));
+        if (!adisc) {
+                rjt_data.fp = NULL;
+                rjt_data.reason = ELS_RJT_PROT;
+                rjt_data.explan = ELS_EXPL_INV_LEN;
+                lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+                goto drop;
+        }
+
+        fp = fc_frame_alloc(lport, sizeof(*adisc));
+        if (!fp)
+                goto drop;
+        fc_adisc_fill(lport, fp);
+        adisc = fc_frame_payload_get(fp, sizeof(*adisc));
+        adisc->adisc_cmd = ELS_LS_ACC;
+        sp = lport->tt.seq_start_next(sp);
+        f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT;
+        fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+                       FC_TYPE_ELS, f_ctl, 0);
+        lport->tt.seq_send(lport, sp, fp);
+drop:
+        fc_frame_free(in_fp);
+}
+
+/**
+ * fc_rport_recv_els_req() - handle a validated ELS request.
+ * @lport: Fibre Channel local port
+ * @sp: current sequence in the PLOGI exchange
+ * @fp: response frame
+ *
+ * Handle incoming ELS requests that require port login.
+ * The ELS opcode has already been validated by the caller.
+ *
+ * Locking Note: Called with the lport lock held.
+ */
+static void fc_rport_recv_els_req(struct fc_lport *lport,
+                                  struct fc_seq *sp, struct fc_frame *fp)
+{
+        struct fc_rport_priv *rdata;
         struct fc_frame_header *fh;
         struct fc_seq_els_data els_data;
-        u8 op;
-
-        mutex_lock(&rdata->rp_mutex);
 
         els_data.fp = NULL;
-        els_data.explan = ELS_EXPL_NONE;
-        els_data.reason = ELS_RJT_NONE;
+        els_data.reason = ELS_RJT_UNAB;
+        els_data.explan = ELS_EXPL_PLOGI_REQD;
 
         fh = fc_frame_header_get(fp);
 
-        if (fh->fh_r_ctl == FC_RCTL_ELS_REQ && fh->fh_type == FC_TYPE_ELS) {
-                op = fc_frame_payload_op(fp);
-                switch (op) {
-                case ELS_PLOGI:
-                        fc_rport_recv_plogi_req(rport, sp, fp);
-                        break;
-                case ELS_PRLI:
-                        fc_rport_recv_prli_req(rport, sp, fp);
-                        break;
-                case ELS_PRLO:
-                        fc_rport_recv_prlo_req(rport, sp, fp);
-                        break;
-                case ELS_LOGO:
-                        fc_rport_recv_logo_req(rport, sp, fp);
-                        break;
-                case ELS_RRQ:
-                        els_data.fp = fp;
-                        lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data);
-                        break;
-                case ELS_REC:
-                        els_data.fp = fp;
-                        lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data);
-                        break;
-                default:
-                        els_data.reason = ELS_RJT_UNSUP;
-                        lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data);
-                        break;
-                }
+        mutex_lock(&lport->disc.disc_mutex);
+        rdata = lport->tt.rport_lookup(lport, ntoh24(fh->fh_s_id));
+        if (!rdata) {
+                mutex_unlock(&lport->disc.disc_mutex);
+                goto reject;
+        }
+        mutex_lock(&rdata->rp_mutex);
+        mutex_unlock(&lport->disc.disc_mutex);
+
+        switch (rdata->rp_state) {
+        case RPORT_ST_PRLI:
+        case RPORT_ST_RTV:
+        case RPORT_ST_READY:
+        case RPORT_ST_ADISC:
+                break;
+        default:
+                mutex_unlock(&rdata->rp_mutex);
+                goto reject;
+        }
+
+        switch (fc_frame_payload_op(fp)) {
+        case ELS_PRLI:
+                fc_rport_recv_prli_req(rdata, sp, fp);
+                break;
+        case ELS_PRLO:
+                fc_rport_recv_prlo_req(rdata, sp, fp);
+                break;
+        case ELS_ADISC:
+                fc_rport_recv_adisc_req(rdata, sp, fp);
+                break;
+        case ELS_RRQ:
+                els_data.fp = fp;
+                lport->tt.seq_els_rsp_send(sp, ELS_RRQ, &els_data);
+                break;
+        case ELS_REC:
+                els_data.fp = fp;
+                lport->tt.seq_els_rsp_send(sp, ELS_REC, &els_data);
+                break;
+        default:
+                fc_frame_free(fp);      /* can't happen */
+                break;
         }
 
         mutex_unlock(&rdata->rp_mutex);
+        return;
+
+reject:
+        lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data);
+        fc_frame_free(fp);
+}
+
+/**
+ * fc_rport_recv_req() - Handle a received ELS request from a rport
+ * @sp: current sequence in the PLOGI exchange
+ * @fp: response frame
+ * @lport: Fibre Channel local port
+ *
+ * Locking Note: Called with the lport lock held.
+ */
+void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
+                       struct fc_lport *lport)
+{
+        struct fc_seq_els_data els_data;
+
+        /*
+         * Handle PLOGI and LOGO requests separately, since they
+         * don't require prior login.
+         * Check for unsupported opcodes first and reject them.
+         * For some ops, it would be incorrect to reject with "PLOGI required".
+         */
+        switch (fc_frame_payload_op(fp)) {
+        case ELS_PLOGI:
+                fc_rport_recv_plogi_req(lport, sp, fp);
+                break;
+        case ELS_LOGO:
+                fc_rport_recv_logo_req(lport, sp, fp);
+                break;
+        case ELS_PRLI:
+        case ELS_PRLO:
+        case ELS_ADISC:
+        case ELS_RRQ:
+        case ELS_REC:
+                fc_rport_recv_els_req(lport, sp, fp);
+                break;
+        default:
+                fc_frame_free(fp);
+                els_data.fp = NULL;
+                els_data.reason = ELS_RJT_UNSUP;
+                els_data.explan = ELS_EXPL_NONE;
+                lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &els_data);
+                break;
+        }
 }
 
 /**
  * fc_rport_recv_plogi_req() - Handle incoming Port Login (PLOGI) request
- * @rport: Fibre Channel remote port that initiated PLOGI
+ * @lport: local port
  * @sp: current sequence in the PLOGI exchange
  * @fp: PLOGI request frame
  *
- * Locking Note: The rport lock is exected to be held before calling
- * this function.
+ * Locking Note: The rport lock is held before calling this function.
  */
-static void fc_rport_recv_plogi_req(struct fc_rport *rport,
+static void fc_rport_recv_plogi_req(struct fc_lport *lport,
                                     struct fc_seq *sp, struct fc_frame *rx_fp)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-        struct fc_lport *lport = rdata->local_port;
+        struct fc_disc *disc;
+        struct fc_rport_priv *rdata;
         struct fc_frame *fp = rx_fp;
         struct fc_exch *ep;
         struct fc_frame_header *fh;
         struct fc_els_flogi *pl;
         struct fc_seq_els_data rjt_data;
-        u32 sid;
-        u64 wwpn;
-        u64 wwnn;
-        enum fc_els_rjt_reason reject = 0;
-        u32 f_ctl;
-        rjt_data.fp = NULL;
+        u32 sid, f_ctl;
 
+        rjt_data.fp = NULL;
         fh = fc_frame_header_get(fp);
+        sid = ntoh24(fh->fh_s_id);
 
-        FC_RPORT_DBG(rport, "Received PLOGI request while in state %s\n",
-                     fc_rport_state(rport));
+        FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n");
 
-        sid = ntoh24(fh->fh_s_id);
         pl = fc_frame_payload_get(fp, sizeof(*pl));
         if (!pl) {
-                FC_RPORT_DBG(rport, "Received PLOGI too short\n");
-                WARN_ON(1);
-                /* XXX TBD: send reject? */
-                fc_frame_free(fp);
-                return;
+                FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n");
+                rjt_data.reason = ELS_RJT_PROT;
+                rjt_data.explan = ELS_EXPL_INV_LEN;
+                goto reject;
+        }
+
+        disc = &lport->disc;
+        mutex_lock(&disc->disc_mutex);
+        rdata = lport->tt.rport_create(lport, sid);
+        if (!rdata) {
+                mutex_unlock(&disc->disc_mutex);
+                rjt_data.reason = ELS_RJT_UNAB;
+                rjt_data.explan = ELS_EXPL_INSUF_RES;
+                goto reject;
         }
-        wwpn = get_unaligned_be64(&pl->fl_wwpn);
-        wwnn = get_unaligned_be64(&pl->fl_wwnn);
+
+        mutex_lock(&rdata->rp_mutex);
+        mutex_unlock(&disc->disc_mutex);
+
+        rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn);
+        rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn);
 
         /*
-         * If the session was just created, possibly due to the incoming PLOGI,
+         * If the rport was just created, possibly due to the incoming PLOGI,
          * set the state appropriately and accept the PLOGI.
          *
          * If we had also sent a PLOGI, and if the received PLOGI is from a
@@ -996,86 +1236,76 @@ static void fc_rport_recv_plogi_req(struct fc_rport *rport,
          */
         switch (rdata->rp_state) {
         case RPORT_ST_INIT:
-                FC_RPORT_DBG(rport, "Received PLOGI, wwpn %llx state INIT "
-                             "- reject\n", (unsigned long long)wwpn);
-                reject = ELS_RJT_UNSUP;
+                FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n");
                 break;
         case RPORT_ST_PLOGI:
-                FC_RPORT_DBG(rport, "Received PLOGI in PLOGI state %d\n",
-                             rdata->rp_state);
-                if (wwpn < lport->wwpn)
-                        reject = ELS_RJT_INPROG;
+                FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n");
+                if (rdata->ids.port_name < lport->wwpn) {
+                        mutex_unlock(&rdata->rp_mutex);
+                        rjt_data.reason = ELS_RJT_INPROG;
+                        rjt_data.explan = ELS_EXPL_NONE;
+                        goto reject;
+                }
                 break;
         case RPORT_ST_PRLI:
         case RPORT_ST_READY:
-                FC_RPORT_DBG(rport, "Received PLOGI in logged-in state %d "
+        case RPORT_ST_ADISC:
+                FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d "
                              "- ignored for now\n", rdata->rp_state);
                 /* XXX TBD - should reset */
                 break;
-        case RPORT_ST_NONE:
+        case RPORT_ST_DELETE:
         default:
-                FC_RPORT_DBG(rport, "Received PLOGI in unexpected "
-                             "state %d\n", rdata->rp_state);
-                fc_frame_free(fp);
-                return;
-                break;
+                FC_RPORT_DBG(rdata, "Received PLOGI in unexpected state %d\n",
+                             rdata->rp_state);
+                fc_frame_free(rx_fp);
+                goto out;
         }
 
-        if (reject) {
-                rjt_data.reason = reject;
-                rjt_data.explan = ELS_EXPL_NONE;
-                lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
-                fc_frame_free(fp);
-        } else {
-                fp = fc_frame_alloc(lport, sizeof(*pl));
-                if (fp == NULL) {
-                        fp = rx_fp;
-                        rjt_data.reason = ELS_RJT_UNAB;
-                        rjt_data.explan = ELS_EXPL_NONE;
-                        lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
-                        fc_frame_free(fp);
-                } else {
-                        sp = lport->tt.seq_start_next(sp);
-                        WARN_ON(!sp);
-                        fc_rport_set_name(rport, wwpn, wwnn);
-
-                        /*
-                         * Get session payload size from incoming PLOGI.
-                         */
-                        rport->maxframe_size =
-                                fc_plogi_get_maxframe(pl, lport->mfs);
-                        fc_frame_free(rx_fp);
-                        fc_plogi_fill(lport, fp, ELS_LS_ACC);
-
-                        /*
-                         * Send LS_ACC.  If this fails,
-                         * the originator should retry.
-                         */
-                        f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
-                        f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
-                        ep = fc_seq_exch(sp);
-                        fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
-                                       FC_TYPE_ELS, f_ctl, 0);
-                        lport->tt.seq_send(lport, sp, fp);
-                        if (rdata->rp_state == RPORT_ST_PLOGI)
-                                fc_rport_enter_prli(rport);
-                }
-        }
+        /*
+         * Get session payload size from incoming PLOGI.
+         */
+        rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs);
+        fc_frame_free(rx_fp);
+
+        /*
+         * Send LS_ACC.  If this fails, the originator should retry.
+         */
+        sp = lport->tt.seq_start_next(sp);
+        if (!sp)
+                goto out;
+        fp = fc_frame_alloc(lport, sizeof(*pl));
+        if (!fp)
+                goto out;
+
+        fc_plogi_fill(lport, fp, ELS_LS_ACC);
+        f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT;
+        ep = fc_seq_exch(sp);
+        fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
+                       FC_TYPE_ELS, f_ctl, 0);
+        lport->tt.seq_send(lport, sp, fp);
+        fc_rport_enter_prli(rdata);
+out:
+        mutex_unlock(&rdata->rp_mutex);
+        return;
+
+reject:
+        lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
+        fc_frame_free(fp);
 }
 
 /**
  * fc_rport_recv_prli_req() - Handle incoming Process Login (PRLI) request
- * @rport: Fibre Channel remote port that initiated PRLI
+ * @rdata: private remote port data
  * @sp: current sequence in the PRLI exchange
  * @fp: PRLI request frame
  *
  * Locking Note: The rport lock is exected to be held before calling
  * this function.
  */
-static void fc_rport_recv_prli_req(struct fc_rport *rport,
+static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
                                    struct fc_seq *sp, struct fc_frame *rx_fp)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
         struct fc_exch *ep;
         struct fc_frame *fp;
@@ -1099,12 +1329,14 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
 
         fh = fc_frame_header_get(rx_fp);
 
-        FC_RPORT_DBG(rport, "Received PRLI request while in state %s\n",
-                     fc_rport_state(rport));
+        FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n",
+                     fc_rport_state(rdata));
 
         switch (rdata->rp_state) {
         case RPORT_ST_PRLI:
+        case RPORT_ST_RTV:
         case RPORT_ST_READY:
+        case RPORT_ST_ADISC:
                 reason = ELS_RJT_NONE;
                 break;
         default:
@@ -1149,6 +1381,9 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
                 pp->prli.prli_len = htons(len);
                 len -= sizeof(struct fc_els_prli);
 
+                /* reinitialize remote port roles */
+                rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
+
                 /*
                  * Go through all the service parameter pages and build
                  * response.  If plen indicates longer SPP than standard,
@@ -1169,12 +1404,12 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
                                 fcp_parm = ntohl(rspp->spp_params);
                                 if (fcp_parm * FCP_SPPF_RETRY)
                                         rdata->flags |= FC_RP_FLAGS_RETRY;
-                                rport->supported_classes = FC_COS_CLASS3;
+                                rdata->supported_classes = FC_COS_CLASS3;
                                 if (fcp_parm & FCP_SPPF_INIT_FCN)
                                         roles |= FC_RPORT_ROLE_FCP_INITIATOR;
                                 if (fcp_parm & FCP_SPPF_TARG_FCN)
                                         roles |= FC_RPORT_ROLE_FCP_TARGET;
-                                rport->roles = roles;
+                                rdata->ids.roles = roles;
 
                                 spp->spp_params =
                                         htonl(lport->service_params);
@@ -1204,9 +1439,10 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
                  */
                 switch (rdata->rp_state) {
                 case RPORT_ST_PRLI:
-                        fc_rport_enter_ready(rport);
+                        fc_rport_enter_ready(rdata);
                         break;
                 case RPORT_ST_READY:
+                case RPORT_ST_ADISC:
                         break;
                 default:
                         break;
@@ -1217,17 +1453,17 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
 
 /**
  * fc_rport_recv_prlo_req() - Handle incoming Process Logout (PRLO) request
- * @rport: Fibre Channel remote port that initiated PRLO
+ * @rdata: private remote port data
  * @sp: current sequence in the PRLO exchange
  * @fp: PRLO request frame
  *
  * Locking Note: The rport lock is exected to be held before calling
  * this function.
  */
-static void fc_rport_recv_prlo_req(struct fc_rport *rport, struct fc_seq *sp,
+static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
+                                   struct fc_seq *sp,
                                    struct fc_frame *fp)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
         struct fc_lport *lport = rdata->local_port;
 
         struct fc_frame_header *fh;
@@ -1235,13 +1471,8 @@ static void fc_rport_recv_prlo_req(struct fc_rport *rport, struct fc_seq *sp,
 
         fh = fc_frame_header_get(fp);
 
-        FC_RPORT_DBG(rport, "Received PRLO request while in state %s\n",
-                     fc_rport_state(rport));
-
-        if (rdata->rp_state == RPORT_ST_NONE) {
-                fc_frame_free(fp);
-                return;
-        }
+        FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n",
+                     fc_rport_state(rdata));
 
         rjt_data.fp = NULL;
         rjt_data.reason = ELS_RJT_UNAB;
@@ -1252,35 +1483,46 @@ static void fc_rport_recv_prlo_req(struct fc_rport *rport, struct fc_seq *sp,
 
 /**
  * fc_rport_recv_logo_req() - Handle incoming Logout (LOGO) request
- * @rport: Fibre Channel remote port that initiated LOGO
+ * @lport: local port.
  * @sp: current sequence in the LOGO exchange
  * @fp: LOGO request frame
  *
  * Locking Note: The rport lock is exected to be held before calling
  * this function.
  */
-static void fc_rport_recv_logo_req(struct fc_rport *rport, struct fc_seq *sp,
+static void fc_rport_recv_logo_req(struct fc_lport *lport,
+                                   struct fc_seq *sp,
                                    struct fc_frame *fp)
 {
         struct fc_frame_header *fh;
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-        struct fc_lport *lport = rdata->local_port;
-
-        fh = fc_frame_header_get(fp);
+        struct fc_rport_priv *rdata;
+        u32 sid;
 
-        FC_RPORT_DBG(rport, "Received LOGO request while in state %s\n",
-                     fc_rport_state(rport));
+        lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
 
-        if (rdata->rp_state == RPORT_ST_NONE) {
-                fc_frame_free(fp);
-                return;
-        }
+        fh = fc_frame_header_get(fp);
+        sid = ntoh24(fh->fh_s_id);
 
-        rdata->event = RPORT_EV_LOGO;
-        fc_rport_state_enter(rport, RPORT_ST_NONE);
-        queue_work(rport_event_queue, &rdata->event_work);
+        mutex_lock(&lport->disc.disc_mutex);
+        rdata = lport->tt.rport_lookup(lport, sid);
+        if (rdata) {
+                mutex_lock(&rdata->rp_mutex);
+                FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n",
+                             fc_rport_state(rdata));
 
-        lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
+                /*
+                 * If the remote port was created due to discovery,
+                 * log back in.  It may have seen a stale RSCN about us.
+                 */
+                if (rdata->rp_state != RPORT_ST_DELETE && rdata->disc_id)
+                        fc_rport_enter_plogi(rdata);
+                else
+                        fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
+                mutex_unlock(&rdata->rp_mutex);
+        } else
+                FC_RPORT_ID_DBG(lport, sid,
+                                "Received LOGO from non-logged-in port\n");
+        mutex_unlock(&lport->disc.disc_mutex);
         fc_frame_free(fp);
 }
 
@@ -1291,8 +1533,11 @@ static void fc_rport_flush_queue(void)
 
 int fc_rport_init(struct fc_lport *lport)
 {
+        if (!lport->tt.rport_lookup)
+                lport->tt.rport_lookup = fc_rport_lookup;
+
         if (!lport->tt.rport_create)
-                lport->tt.rport_create = fc_rport_rogue_create;
+                lport->tt.rport_create = fc_rport_create;
 
         if (!lport->tt.rport_login)
                 lport->tt.rport_login = fc_rport_login;
@@ -1306,6 +1551,9 @@ int fc_rport_init(struct fc_lport *lport)
         if (!lport->tt.rport_flush_queue)
                 lport->tt.rport_flush_queue = fc_rport_flush_queue;
 
+        if (!lport->tt.rport_destroy)
+                lport->tt.rport_destroy = fc_rport_destroy;
+
         return 0;
 }
 EXPORT_SYMBOL(fc_rport_init);
@@ -1327,8 +1575,8 @@ EXPORT_SYMBOL(fc_destroy_rport);
 
 void fc_rport_terminate_io(struct fc_rport *rport)
 {
-        struct fc_rport_libfc_priv *rdata = rport->dd_data;
-        struct fc_lport *lport = rdata->local_port;
+        struct fc_rport_libfc_priv *rp = rport->dd_data;
+        struct fc_lport *lport = rp->local_port;
 
         lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
         lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c
index a751f6230c22..8dc73c489a17 100644
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -109,12 +109,9 @@ inline void iscsi_conn_queue_work(struct iscsi_conn *conn)
 }
 EXPORT_SYMBOL_GPL(iscsi_conn_queue_work);
 
-void
-iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
+static void __iscsi_update_cmdsn(struct iscsi_session *session,
+                                 uint32_t exp_cmdsn, uint32_t max_cmdsn)
 {
-        uint32_t max_cmdsn = be32_to_cpu(hdr->max_cmdsn);
-        uint32_t exp_cmdsn = be32_to_cpu(hdr->exp_cmdsn);
-
         /*
          * standard specifies this check for when to update expected and
          * max sequence numbers
@@ -138,6 +135,12 @@ iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
                         iscsi_conn_queue_work(session->leadconn);
         }
 }
+
+void iscsi_update_cmdsn(struct iscsi_session *session, struct iscsi_nopin *hdr)
+{
+        __iscsi_update_cmdsn(session, be32_to_cpu(hdr->exp_cmdsn),
+                             be32_to_cpu(hdr->max_cmdsn));
+}
 EXPORT_SYMBOL_GPL(iscsi_update_cmdsn);
 
 /**
@@ -301,8 +304,6 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
         hdr->flags = ISCSI_ATTR_SIMPLE;
         int_to_scsilun(sc->device->lun, (struct scsi_lun *)hdr->lun);
         memcpy(task->lun, hdr->lun, sizeof(task->lun));
-        hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn);
-        session->cmdsn++;
         hdr->exp_statsn = cpu_to_be32(conn->exp_statsn);
         cmd_len = sc->cmd_len;
         if (cmd_len < ISCSI_CDB_SIZE)
@@ -388,6 +389,8 @@ static int iscsi_prep_scsi_cmd_pdu(struct iscsi_task *task)
                 return -EIO;
 
         task->state = ISCSI_TASK_RUNNING;
+        hdr->cmdsn = task->cmdsn = cpu_to_be32(session->cmdsn);
+        session->cmdsn++;
 
         conn->scsicmd_pdus_cnt++;
         ISCSI_DBG_SESSION(session, "iscsi prep [%s cid %d sc %p cdb 0x%x "
@@ -499,6 +502,31 @@ static void iscsi_complete_task(struct iscsi_task *task, int state)
         __iscsi_put_task(task);
 }
 
+/**
+ * iscsi_complete_scsi_task - finish scsi task normally
+ * @task: iscsi task for scsi cmd
+ * @exp_cmdsn: expected cmd sn in cpu format
+ * @max_cmdsn: max cmd sn in cpu format
+ *
+ * This is used when drivers do not need or cannot perform
+ * lower level pdu processing.
+ *
+ * Called with session lock
+ */
+void iscsi_complete_scsi_task(struct iscsi_task *task,
+                              uint32_t exp_cmdsn, uint32_t max_cmdsn)
+{
+        struct iscsi_conn *conn = task->conn;
+
+        ISCSI_DBG_SESSION(conn->session, "[itt 0x%x]\n", task->itt);
+
+        conn->last_recv = jiffies;
+        __iscsi_update_cmdsn(conn->session, exp_cmdsn, max_cmdsn);
+        iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+}
+EXPORT_SYMBOL_GPL(iscsi_complete_scsi_task);
+
+
 /*
  * session lock must be held and if not called for a task that is
  * still pending or from the xmit thread, then xmit thread must
@@ -857,27 +885,102 @@ static void iscsi_send_nopout(struct iscsi_conn *conn, struct iscsi_nopin *rhdr)
         }
 }
 
+static int iscsi_nop_out_rsp(struct iscsi_task *task,
+                             struct iscsi_nopin *nop, char *data, int datalen)
+{
+        struct iscsi_conn *conn = task->conn;
+        int rc = 0;
+
+        if (conn->ping_task != task) {
+                /*
+                 * If this is not in response to one of our
+                 * nops then it must be from userspace.
+                 */
+                if (iscsi_recv_pdu(conn->cls_conn, (struct iscsi_hdr *)nop,
+                                   data, datalen))
+                        rc = ISCSI_ERR_CONN_FAILED;
+        } else
+                mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout);
+        iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+        return rc;
+}
+
 static int iscsi_handle_reject(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
                                char *data, int datalen)
 {
         struct iscsi_reject *reject = (struct iscsi_reject *)hdr;
         struct iscsi_hdr rejected_pdu;
+        int opcode, rc = 0;
 
         conn->exp_statsn = be32_to_cpu(reject->statsn) + 1;
 
-        if (reject->reason == ISCSI_REASON_DATA_DIGEST_ERROR) {
-                if (ntoh24(reject->dlength) > datalen)
-                        return ISCSI_ERR_PROTO;
+        if (ntoh24(reject->dlength) > datalen ||
+            ntoh24(reject->dlength) < sizeof(struct iscsi_hdr)) {
+                iscsi_conn_printk(KERN_ERR, conn, "Cannot handle rejected "
+                                  "pdu. Invalid data length (pdu dlength "
+                                  "%u, datalen %d\n", ntoh24(reject->dlength),
+                                  datalen);
+                return ISCSI_ERR_PROTO;
+        }
+        memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr));
+        opcode = rejected_pdu.opcode & ISCSI_OPCODE_MASK;
+
+        switch (reject->reason) {
+        case ISCSI_REASON_DATA_DIGEST_ERROR:
+                iscsi_conn_printk(KERN_ERR, conn,
+                                  "pdu (op 0x%x itt 0x%x) rejected "
+                                  "due to DataDigest error.\n",
+                                  rejected_pdu.itt, opcode);
+                break;
+        case ISCSI_REASON_IMM_CMD_REJECT:
+                iscsi_conn_printk(KERN_ERR, conn,
+                                  "pdu (op 0x%x itt 0x%x) rejected. Too many "
+                                  "immediate commands.\n",
+                                  rejected_pdu.itt, opcode);
+                /*
+                 * We only send one TMF at a time so if the target could not
+                 * handle it, then it should get fixed (RFC mandates that
+                 * a target can handle one immediate TMF per conn).
+                 *
+                 * For nops-outs, we could have sent more than one if
+                 * the target is sending us lots of nop-ins
+                 */
+                if (opcode != ISCSI_OP_NOOP_OUT)
+                        return 0;
 
-                if (ntoh24(reject->dlength) >= sizeof(struct iscsi_hdr)) {
-                        memcpy(&rejected_pdu, data, sizeof(struct iscsi_hdr));
-                        iscsi_conn_printk(KERN_ERR, conn,
-                                          "pdu (op 0x%x) rejected "
-                                          "due to DataDigest error.\n",
-                                          rejected_pdu.opcode);
+                 if (rejected_pdu.itt == cpu_to_be32(ISCSI_RESERVED_TAG))
+                        /*
+                         * nop-out in response to target's nop-out rejected.
+                         * Just resend.
+                         */
+                        iscsi_send_nopout(conn,
+                                          (struct iscsi_nopin*)&rejected_pdu);
+                else {
+                        struct iscsi_task *task;
+                        /*
+                         * Our nop as ping got dropped. We know the target
+                         * and transport are ok so just clean up
+                         */
+                        task = iscsi_itt_to_task(conn, rejected_pdu.itt);
+                        if (!task) {
+                                iscsi_conn_printk(KERN_ERR, conn,
+                                                 "Invalid pdu reject. Could "
+                                                 "not lookup rejected task.\n");
+                                rc = ISCSI_ERR_BAD_ITT;
+                        } else
+                                rc = iscsi_nop_out_rsp(task,
+                                        (struct iscsi_nopin*)&rejected_pdu,
+                                        NULL, 0);
                 }
+                break;
+        default:
+                iscsi_conn_printk(KERN_ERR, conn,
+                                  "pdu (op 0x%x itt 0x%x) rejected. Reason "
+                                  "code 0x%x\n", rejected_pdu.itt,
+                                  rejected_pdu.opcode, reject->reason);
+                break;
         }
-        return 0;
+        return rc;
 }
 
 /**
@@ -1038,15 +1141,8 @@ int __iscsi_complete_pdu(struct iscsi_conn *conn, struct iscsi_hdr *hdr,
                 }
                 conn->exp_statsn = be32_to_cpu(hdr->statsn) + 1;
 
-                if (conn->ping_task != task)
-                        /*
-                         * If this is not in response to one of our
-                         * nops then it must be from userspace.
-                         */
-                        goto recv_pdu;
-
-                mod_timer(&conn->transport_timer, jiffies + conn->recv_timeout);
-                iscsi_complete_task(task, ISCSI_TASK_COMPLETED);
+                rc = iscsi_nop_out_rsp(task, (struct iscsi_nopin*)hdr,
+                                       data, datalen);
                 break;
         default:
                 rc = ISCSI_ERR_BAD_OPCODE;
@@ -1212,6 +1308,9 @@ static int iscsi_xmit_task(struct iscsi_conn *conn)
         struct iscsi_task *task = conn->task;
         int rc;
 
+        if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx))
+                return -ENODATA;
+
         __iscsi_get_task(task);
         spin_unlock_bh(&conn->session->lock);
         rc = conn->session->tt->xmit_task(task);
@@ -1261,7 +1360,7 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
         int rc = 0;
 
         spin_lock_bh(&conn->session->lock);
-        if (unlikely(conn->suspend_tx)) {
+        if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
                 ISCSI_DBG_SESSION(conn->session, "Tx suspended!\n");
                 spin_unlock_bh(&conn->session->lock);
                 return -ENODATA;
@@ -1270,7 +1369,7 @@ static int iscsi_data_xmit(struct iscsi_conn *conn)
         if (conn->task) {
                 rc = iscsi_xmit_task(conn);
                 if (rc)
-                        goto again;
+                        goto done;
         }
 
         /*
@@ -1290,7 +1389,7 @@ check_mgmt:
                 }
                 rc = iscsi_xmit_task(conn);
                 if (rc)
-                        goto again;
+                        goto done;
         }
 
         /* process pending command queue */
@@ -1311,14 +1410,14 @@ check_mgmt:
                                 list_add_tail(&conn->task->running,
                                               &conn->cmdqueue);
                                 conn->task = NULL;
-                                goto again;
+                                goto done;
                         } else
                                 fail_scsi_task(conn->task, DID_ABORT);
                         continue;
                 }
                 rc = iscsi_xmit_task(conn);
                 if (rc)
-                        goto again;
+                        goto done;
                 /*
                  * we could continuously get new task requests so
                  * we need to check the mgmt queue for nops that need to
@@ -1344,16 +1443,14 @@ check_mgmt:
                 conn->task->state = ISCSI_TASK_RUNNING;
                 rc = iscsi_xmit_task(conn);
                 if (rc)
-                        goto again;
+                        goto done;
                 if (!list_empty(&conn->mgmtqueue))
                         goto check_mgmt;
         }
         spin_unlock_bh(&conn->session->lock);
         return -ENODATA;
 
-again:
-        if (unlikely(conn->suspend_tx))
-                rc = -ENODATA;
+done:
         spin_unlock_bh(&conn->session->lock);
         return rc;
 }
@@ -1474,6 +1571,12 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
                 goto fault;
         }
 
+        if (test_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx)) {
+                reason = FAILURE_SESSION_IN_RECOVERY;
+                sc->result = DID_REQUEUE;
+                goto fault;
+        }
+
         if (iscsi_check_cmdsn_window_closed(conn)) {
                 reason = FAILURE_WINDOW_CLOSED;
                 goto reject;
@@ -1497,6 +1600,7 @@ int iscsi_queuecommand(struct scsi_cmnd *sc, void (*done)(struct scsi_cmnd *))
                         }
                 }
                 if (session->tt->xmit_task(task)) {
+                        session->cmdsn--;
                         reason = FAILURE_SESSION_NOT_READY;
                         goto prepd_reject;
                 }
@@ -1712,6 +1816,33 @@ static void fail_scsi_tasks(struct iscsi_conn *conn, unsigned lun,
         }
 }
 
+/**
+ * iscsi_suspend_queue - suspend iscsi_queuecommand
+ * @conn: iscsi conn to stop queueing IO on
+ *
+ * This grabs the session lock to make sure no one is in
+ * xmit_task/queuecommand, and then sets suspend to prevent
+ * new commands from being queued. This only needs to be called
+ * by offload drivers that need to sync a path like ep disconnect
+ * with the iscsi_queuecommand/xmit_task. To start IO again libiscsi
+ * will call iscsi_start_tx and iscsi_unblock_session when in FFP.
+ */
+void iscsi_suspend_queue(struct iscsi_conn *conn)
+{
+        spin_lock_bh(&conn->session->lock);
+        set_bit(ISCSI_SUSPEND_BIT, &conn->suspend_tx);
+        spin_unlock_bh(&conn->session->lock);
+}
+EXPORT_SYMBOL_GPL(iscsi_suspend_queue);
+
+/**
+ * iscsi_suspend_tx - suspend iscsi_data_xmit
+ * @conn: iscsi conn tp stop processing IO on.
+ *
+ * This function sets the suspend bit to prevent iscsi_data_xmit
+ * from sending new IO, and if work is queued on the xmit thread
+ * it will wait for it to be completed.
+ */
 void iscsi_suspend_tx(struct iscsi_conn *conn)
 {
         struct Scsi_Host *shost = conn->session->host;
diff --git a/drivers/scsi/libsrp.c b/drivers/scsi/libsrp.c
index 2742ae8a3d09..9ad38e81e343 100644
--- a/drivers/scsi/libsrp.c
+++ b/drivers/scsi/libsrp.c
@@ -124,6 +124,7 @@ static void srp_ring_free(struct device *dev, struct srp_buf **ring, size_t max,
                 dma_free_coherent(dev, size, ring[i]->buf, ring[i]->dma);
                 kfree(ring[i]);
         }
+        kfree(ring);
 }
 
 int srp_target_alloc(struct srp_target *target, struct device *dev,
diff --git a/drivers/scsi/lpfc/Makefile b/drivers/scsi/lpfc/Makefile
index 1c286707dd5f..ad05d6edb8f6 100644
--- a/drivers/scsi/lpfc/Makefile
+++ b/drivers/scsi/lpfc/Makefile
@@ -28,4 +28,4 @@ obj-$(CONFIG_SCSI_LPFC) := lpfc.o
 
 lpfc-objs := lpfc_mem.o lpfc_sli.o lpfc_ct.o lpfc_els.o lpfc_hbadisc.o  \
         lpfc_init.o lpfc_mbox.o lpfc_nportdisc.o lpfc_scsi.o lpfc_attr.o \
-        lpfc_vport.o lpfc_debugfs.o
+        lpfc_vport.o lpfc_debugfs.o lpfc_bsg.o
diff --git a/drivers/scsi/lpfc/lpfc.h b/drivers/scsi/lpfc/lpfc.h
index 1877d9811831..aa10f7951634 100644
--- a/drivers/scsi/lpfc/lpfc.h
+++ b/drivers/scsi/lpfc/lpfc.h
@@ -312,6 +312,7 @@ struct lpfc_vport {
 #define FC_BYPASSED_MODE        0x20000  /* NPort is in bypassed mode */
 #define FC_VPORT_NEEDS_REG_VPI  0x80000  /* Needs to have its vpi registered */
 #define FC_RSCN_DEFERRED        0x100000 /* A deferred RSCN being processed */
+#define FC_VPORT_NEEDS_INIT_VPI 0x200000 /* Need to INIT_VPI before FDISC */
 
         uint32_t ct_flags;
 #define FC_CT_RFF_ID            0x1      /* RFF_ID accepted by switch */
@@ -440,6 +441,12 @@ enum intr_type_t {
         MSIX,
 };
 
+struct unsol_rcv_ct_ctx {
+        uint32_t ctxt_id;
+        uint32_t SID;
+        uint32_t oxid;
+};
+
 struct lpfc_hba {
         /* SCSI interface function jump table entries */
         int (*lpfc_new_scsi_buf)
@@ -525,6 +532,8 @@ struct lpfc_hba {
 #define FCP_XRI_ABORT_EVENT     0x20
 #define ELS_XRI_ABORT_EVENT     0x40
 #define ASYNC_EVENT             0x80
+#define LINK_DISABLED           0x100 /* Link disabled by user */
+#define FCF_DISC_INPROGRESS     0x200 /* FCF discovery in progress */
         struct lpfc_dmabuf slim2p;
 
         MAILBOX_t *mbox;
@@ -616,6 +625,8 @@ struct lpfc_hba {
         uint32_t hbq_count;             /* Count of configured HBQs */
         struct hbq_s hbqs[LPFC_MAX_HBQS]; /* local copy of hbq indicies  */
 
+        uint32_t fcp_qidx;              /* next work queue to post work to */
+
         unsigned long pci_bar0_map;     /* Physical address for PCI BAR0 */
         unsigned long pci_bar1_map;     /* Physical address for PCI BAR1 */
         unsigned long pci_bar2_map;     /* Physical address for PCI BAR2 */
@@ -682,6 +693,7 @@ struct lpfc_hba {
         struct pci_pool *lpfc_mbuf_pool;
         struct pci_pool *lpfc_hrb_pool; /* header receive buffer pool */
         struct pci_pool *lpfc_drb_pool; /* data receive buffer pool */
+        struct pci_pool *lpfc_hbq_pool; /* SLI3 hbq buffer pool */
         struct lpfc_dma_pool lpfc_mbuf_safety_pool;
 
         mempool_t *mbox_mem_pool;
@@ -763,11 +775,18 @@ struct lpfc_hba {
 /* Maximum number of events that can be outstanding at any time*/
 #define LPFC_MAX_EVT_COUNT 512
         atomic_t fast_event_count;
+        uint32_t fcoe_eventtag;
+        uint32_t fcoe_eventtag_at_fcf_scan;
         struct lpfc_fcf fcf;
         uint8_t fc_map[3];
         uint8_t valid_vlan;
         uint16_t vlan_id;
         struct list_head fcf_conn_rec_list;
+
+        struct mutex ct_event_mutex; /* synchronize access to ct_ev_waiters */
+        struct list_head ct_ev_waiters;
+        struct unsol_rcv_ct_ctx ct_ctx[64];
+        uint32_t ctx_idx;
 };
 
 static inline struct Scsi_Host *
diff --git a/drivers/scsi/lpfc/lpfc_attr.c b/drivers/scsi/lpfc/lpfc_attr.c
index fc07be5fbce9..e1a30a16a9fa 100644
--- a/drivers/scsi/lpfc/lpfc_attr.c
+++ b/drivers/scsi/lpfc/lpfc_attr.c
@@ -394,7 +394,12 @@ lpfc_link_state_show(struct device *dev, struct device_attribute *attr,
         case LPFC_INIT_MBX_CMDS:
         case LPFC_LINK_DOWN:
         case LPFC_HBA_ERROR:
-                len += snprintf(buf + len, PAGE_SIZE-len, "Link Down\n");
+                if (phba->hba_flag & LINK_DISABLED)
+                        len += snprintf(buf + len, PAGE_SIZE-len,
+                                "Link Down - User disabled\n");
+                else
+                        len += snprintf(buf + len, PAGE_SIZE-len,
+                                "Link Down\n");
                 break;
         case LPFC_LINK_UP:
         case LPFC_CLEAR_LA:
@@ -4127,6 +4132,9 @@ struct fc_function_template lpfc_transport_functions = {
         .vport_disable = lpfc_vport_disable,
 
         .set_vport_symbolic_name = lpfc_set_vport_symbolic_name,
+
+        .bsg_request = lpfc_bsg_request,
+        .bsg_timeout = lpfc_bsg_timeout,
 };
 
 struct fc_function_template lpfc_vport_transport_functions = {
diff --git a/drivers/scsi/lpfc/lpfc_bsg.c b/drivers/scsi/lpfc/lpfc_bsg.c
new file mode 100644
index 000000000000..da6bf5aac9dd
--- /dev/null
+++ b/drivers/scsi/lpfc/lpfc_bsg.c
@@ -0,0 +1,904 @@
+/*******************************************************************
+ * This file is part of the Emulex Linux Device Driver for         *
+ * Fibre Channel Host Bus Adapters.                                *
+ * Copyright (C) 2009 Emulex.  All rights reserved.                *
+ * EMULEX and SLI are trademarks of Emulex.                        *
+ * www.emulex.com                                                  *
+ *                                                                 *
+ * This program is free software; you can redistribute it and/or   *
+ * modify it under the terms of version 2 of the GNU General       *
+ * Public License as published by the Free Software Foundation.    *
+ * This program is distributed in the hope that it will be useful. *
+ * ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND          *
+ * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,  *
+ * FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE      *
+ * DISCLAIMED, EXCEPT TO THE EXTENT THAT SUCH DISCLAIMERS ARE HELD *
+ * TO BE LEGALLY INVALID.  See the GNU General Public License for  *
+ * more details, a copy of which can be found in the file COPYING  *
+ * included with this package.                                     *
+ *******************************************************************/
+
+#include <linux/interrupt.h>
+#include <linux/mempool.h>
+#include <linux/pci.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_transport_fc.h>
+#include <scsi/scsi_bsg_fc.h>
+
+#include "lpfc_hw4.h"
+#include "lpfc_hw.h"
+#include "lpfc_sli.h"
+#include "lpfc_sli4.h"
+#include "lpfc_nl.h"
+#include "lpfc_disc.h"
+#include "lpfc_scsi.h"
+#include "lpfc.h"
+#include "lpfc_logmsg.h"
+#include "lpfc_crtn.h"
+#include "lpfc_vport.h"
+#include "lpfc_version.h"
+
+/**
+ * lpfc_bsg_rport_ct - send a CT command from a bsg request
+ * @job: fc_bsg_job to handle
+ */
+static int
+lpfc_bsg_rport_ct(struct fc_bsg_job *job)
+{
+        struct Scsi_Host *shost = job->shost;
+        struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
+        struct lpfc_hba *phba = vport->phba;
+        struct lpfc_rport_data *rdata = job->rport->dd_data;
+        struct lpfc_nodelist *ndlp = rdata->pnode;
+        struct ulp_bde64 *bpl = NULL;
+        uint32_t timeout;
+        struct lpfc_iocbq *cmdiocbq = NULL;
+        struct lpfc_iocbq *rspiocbq = NULL;
+        IOCB_t *cmd;
+        IOCB_t *rsp;
+        struct lpfc_dmabuf *bmp = NULL;
+        int request_nseg;
+        int reply_nseg;
+        struct scatterlist *sgel = NULL;
+        int numbde;
+        dma_addr_t busaddr;
+        int rc = 0;
+
+        /* in case no data is transferred */
+        job->reply->reply_payload_rcv_len = 0;
+
+        if (!lpfc_nlp_get(ndlp)) {
+                job->reply->result = -ENODEV;
+                return 0;
+        }
+
+        if (ndlp->nlp_flag & NLP_ELS_SND_MASK) {
+                rc = -ENODEV;
+                goto free_ndlp_exit;
+        }
+
+        spin_lock_irq(shost->host_lock);
+        cmdiocbq = lpfc_sli_get_iocbq(phba);
+        if (!cmdiocbq) {
+                rc = -ENOMEM;
+                spin_unlock_irq(shost->host_lock);
+                goto free_ndlp_exit;
+        }
+        cmd = &cmdiocbq->iocb;
+
+        rspiocbq = lpfc_sli_get_iocbq(phba);
+        if (!rspiocbq) {
+                rc = -ENOMEM;
+                goto free_cmdiocbq;
+        }
+        spin_unlock_irq(shost->host_lock);
+
+        rsp = &rspiocbq->iocb;
+
+        bmp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
+        if (!bmp) {
+                rc = -ENOMEM;
+                spin_lock_irq(shost->host_lock);
+                goto free_rspiocbq;
+        }
+
+        spin_lock_irq(shost->host_lock);
+        bmp->virt = lpfc_mbuf_alloc(phba, 0, &bmp->phys);
+        if (!bmp->virt) {
+                rc = -ENOMEM;
+                goto free_bmp;
+        }
+        spin_unlock_irq(shost->host_lock);
+
+        INIT_LIST_HEAD(&bmp->list);
+        bpl = (struct ulp_bde64 *) bmp->virt;
+
+        request_nseg = pci_map_sg(phba->pcidev, job->request_payload.sg_list,
+                                  job->request_payload.sg_cnt, DMA_TO_DEVICE);
+        for_each_sg(job->request_payload.sg_list, sgel, request_nseg, numbde) {
+                busaddr = sg_dma_address(sgel);
+                bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+                bpl->tus.f.bdeSize = sg_dma_len(sgel);
+                bpl->tus.w = cpu_to_le32(bpl->tus.w);
+                bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
+                bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
+                bpl++;
+        }
+
+        reply_nseg = pci_map_sg(phba->pcidev, job->reply_payload.sg_list,
+                                job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+        for_each_sg(job->reply_payload.sg_list, sgel, reply_nseg, numbde) {
+                busaddr = sg_dma_address(sgel);
+                bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
+                bpl->tus.f.bdeSize = sg_dma_len(sgel);
+                bpl->tus.w = cpu_to_le32(bpl->tus.w);
+                bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
+                bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
+                bpl++;
+        }
+
+        cmd->un.genreq64.bdl.ulpIoTag32 = 0;
+        cmd->un.genreq64.bdl.addrHigh = putPaddrHigh(bmp->phys);
+        cmd->un.genreq64.bdl.addrLow = putPaddrLow(bmp->phys);
+        cmd->un.genreq64.bdl.bdeFlags = BUFF_TYPE_BLP_64;
+        cmd->un.genreq64.bdl.bdeSize =
+                (request_nseg + reply_nseg) * sizeof(struct ulp_bde64);
+        cmd->ulpCommand = CMD_GEN_REQUEST64_CR;
+        cmd->un.genreq64.w5.hcsw.Fctl = (SI | LA);
+        cmd->un.genreq64.w5.hcsw.Dfctl = 0;
+        cmd->un.genreq64.w5.hcsw.Rctl = FC_UNSOL_CTL;
+        cmd->un.genreq64.w5.hcsw.Type = FC_COMMON_TRANSPORT_ULP;
+        cmd->ulpBdeCount = 1;
+        cmd->ulpLe = 1;
+        cmd->ulpClass = CLASS3;
+        cmd->ulpContext = ndlp->nlp_rpi;
+        cmd->ulpOwner = OWN_CHIP;
+        cmdiocbq->vport = phba->pport;
+        cmdiocbq->context1 = NULL;
+        cmdiocbq->context2 = NULL;
+        cmdiocbq->iocb_flag |= LPFC_IO_LIBDFC;
+
+        timeout = phba->fc_ratov * 2;
+        job->dd_data = cmdiocbq;
+
+        rc = lpfc_sli_issue_iocb_wait(phba, LPFC_ELS_RING, cmdiocbq, rspiocbq,
+                                        timeout + LPFC_DRVR_TIMEOUT);
+
+        if (rc != IOCB_TIMEDOUT) {
+                pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
+                             job->request_payload.sg_cnt, DMA_TO_DEVICE);
+                pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
+                             job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+        }
+
+        if (rc == IOCB_TIMEDOUT) {
+                lpfc_sli_release_iocbq(phba, rspiocbq);
+                rc = -EACCES;
+                goto free_ndlp_exit;
+        }
+
+        if (rc != IOCB_SUCCESS) {
+                rc = -EACCES;
+                goto free_outdmp;
+        }
+
+        if (rsp->ulpStatus) {
+                if (rsp->ulpStatus == IOSTAT_LOCAL_REJECT) {
+                        switch (rsp->un.ulpWord[4] & 0xff) {
+                        case IOERR_SEQUENCE_TIMEOUT:
+                                rc = -ETIMEDOUT;
+                                break;
+                        case IOERR_INVALID_RPI:
+                                rc = -EFAULT;
+                                break;
+                        default:
+                                rc = -EACCES;
+                                break;
+                        }
+                        goto free_outdmp;
+                }
+        } else
+                job->reply->reply_payload_rcv_len =
+                        rsp->un.genreq64.bdl.bdeSize;
+
+free_outdmp:
+        spin_lock_irq(shost->host_lock);
+        lpfc_mbuf_free(phba, bmp->virt, bmp->phys);
+free_bmp:
+        kfree(bmp);
+free_rspiocbq:
+        lpfc_sli_release_iocbq(phba, rspiocbq);
+free_cmdiocbq:
+        lpfc_sli_release_iocbq(phba, cmdiocbq);
+        spin_unlock_irq(shost->host_lock);
+free_ndlp_exit:
+        lpfc_nlp_put(ndlp);
+
+        /* make error code available to userspace */
+        job->reply->result = rc;
+        /* complete the job back to userspace */
+        job->job_done(job);
+
+        return 0;
+}
+
+/**
+ * lpfc_bsg_rport_els - send an ELS command from a bsg request
+ * @job: fc_bsg_job to handle
+ */
+static int
+lpfc_bsg_rport_els(struct fc_bsg_job *job)
+{
+        struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
+        struct lpfc_hba *phba = vport->phba;
+        struct lpfc_rport_data *rdata = job->rport->dd_data;
+        struct lpfc_nodelist *ndlp = rdata->pnode;
+
+        uint32_t elscmd;
+        uint32_t cmdsize;
+        uint32_t rspsize;
+        struct lpfc_iocbq *rspiocbq;
+        struct lpfc_iocbq *cmdiocbq;
+        IOCB_t *rsp;
+        uint16_t rpi = 0;
+        struct lpfc_dmabuf *pcmd;
+        struct lpfc_dmabuf *prsp;
+        struct lpfc_dmabuf *pbuflist = NULL;
+        struct ulp_bde64 *bpl;
+        int iocb_status;
+        int request_nseg;
+        int reply_nseg;
+        struct scatterlist *sgel = NULL;
+        int numbde;
+        dma_addr_t busaddr;
+        int rc = 0;
+
+        /* in case no data is transferred */
+        job->reply->reply_payload_rcv_len = 0;
+
+        if (!lpfc_nlp_get(ndlp)) {
+                rc = -ENODEV;
+                goto out;
+        }
+
+        elscmd = job->request->rqst_data.r_els.els_code;
+        cmdsize = job->request_payload.payload_len;
+        rspsize = job->reply_payload.payload_len;
+        rspiocbq = lpfc_sli_get_iocbq(phba);
+        if (!rspiocbq) {
+                lpfc_nlp_put(ndlp);
+                rc = -ENOMEM;
+                goto out;
+        }
+
+        rsp = &rspiocbq->iocb;
+        rpi = ndlp->nlp_rpi;
+
+        cmdiocbq = lpfc_prep_els_iocb(phba->pport, 1, cmdsize, 0, ndlp,
+                                      ndlp->nlp_DID, elscmd);
+
+        if (!cmdiocbq) {
+                lpfc_sli_release_iocbq(phba, rspiocbq);
+                return -EIO;
+        }
+
+        job->dd_data = cmdiocbq;
+        pcmd = (struct lpfc_dmabuf *) cmdiocbq->context2;
+        prsp = (struct lpfc_dmabuf *) pcmd->list.next;
+
+        lpfc_mbuf_free(phba, pcmd->virt, pcmd->phys);
+        kfree(pcmd);
+        lpfc_mbuf_free(phba, prsp->virt, prsp->phys);
+        kfree(prsp);
+        cmdiocbq->context2 = NULL;
+
+        pbuflist = (struct lpfc_dmabuf *) cmdiocbq->context3;
+        bpl = (struct ulp_bde64 *) pbuflist->virt;
+
+        request_nseg = pci_map_sg(phba->pcidev, job->request_payload.sg_list,
+                                  job->request_payload.sg_cnt, DMA_TO_DEVICE);
+
+        for_each_sg(job->request_payload.sg_list, sgel, request_nseg, numbde) {
+                busaddr = sg_dma_address(sgel);
+                bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64;
+                bpl->tus.f.bdeSize = sg_dma_len(sgel);
+                bpl->tus.w = cpu_to_le32(bpl->tus.w);
+                bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
+                bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
+                bpl++;
+        }
+
+        reply_nseg = pci_map_sg(phba->pcidev, job->reply_payload.sg_list,
+                                job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+        for_each_sg(job->reply_payload.sg_list, sgel, reply_nseg, numbde) {
+                busaddr = sg_dma_address(sgel);
+                bpl->tus.f.bdeFlags = BUFF_TYPE_BDE_64I;
+                bpl->tus.f.bdeSize = sg_dma_len(sgel);
+                bpl->tus.w = cpu_to_le32(bpl->tus.w);
+                bpl->addrLow = cpu_to_le32(putPaddrLow(busaddr));
+                bpl->addrHigh = cpu_to_le32(putPaddrHigh(busaddr));
+                bpl++;
+        }
+
+        cmdiocbq->iocb.un.elsreq64.bdl.bdeSize =
+                (request_nseg + reply_nseg) * sizeof(struct ulp_bde64);
+        cmdiocbq->iocb.ulpContext = rpi;
+        cmdiocbq->iocb_flag |= LPFC_IO_LIBDFC;
+        cmdiocbq->context1 = NULL;
+        cmdiocbq->context2 = NULL;
+
+        iocb_status = lpfc_sli_issue_iocb_wait(phba, LPFC_ELS_RING, cmdiocbq,
+                                        rspiocbq, (phba->fc_ratov * 2)
+                                               + LPFC_DRVR_TIMEOUT);
+
+        /* release the new ndlp once the iocb completes */
+        lpfc_nlp_put(ndlp);
+        if (iocb_status != IOCB_TIMEDOUT) {
+                pci_unmap_sg(phba->pcidev, job->request_payload.sg_list,
+                             job->request_payload.sg_cnt, DMA_TO_DEVICE);
+                pci_unmap_sg(phba->pcidev, job->reply_payload.sg_list,
+                             job->reply_payload.sg_cnt, DMA_FROM_DEVICE);
+        }
+
+        if (iocb_status == IOCB_SUCCESS) {
+                if (rsp->ulpStatus == IOSTAT_SUCCESS) {
+                        job->reply->reply_payload_rcv_len =
+                                rsp->un.elsreq64.bdl.bdeSize;
+                        rc = 0;
+                } else if (rsp->ulpStatus == IOSTAT_LS_RJT) {
+                        struct fc_bsg_ctels_reply *els_reply;
+                        /* LS_RJT data returned in word 4 */
+                        uint8_t *rjt_data = (uint8_t *)&rsp->un.ulpWord[4];
+
+                        els_reply = &job->reply->reply_data.ctels_reply;
+                        job->reply->result = 0;
+                        els_reply->status = FC_CTELS_STATUS_REJECT;
+                        els_reply->rjt_data.action = rjt_data[0];
+                        els_reply->rjt_data.reason_code = rjt_data[1];
+                        els_reply->rjt_data.reason_explanation = rjt_data[2];
+                        els_reply->rjt_data.vendor_unique = rjt_data[3];
+                } else
+                        rc = -EIO;
+        } else
+                rc = -EIO;
+
+        if (iocb_status != IOCB_TIMEDOUT)
+                lpfc_els_free_iocb(phba, cmdiocbq);
+
+        lpfc_sli_release_iocbq(phba, rspiocbq);
+
+out:
+        /* make error code available to userspace */
+        job->reply->result = rc;
+        /* complete the job back to userspace */
+        job->job_done(job);
+
+        return 0;
+}
+
+struct lpfc_ct_event {
+        struct list_head node;
+        int ref;
+        wait_queue_head_t wq;
+
+        /* Event type and waiter identifiers */
+        uint32_t type_mask;
+        uint32_t req_id;
+        uint32_t reg_id;
+
+        /* next two flags are here for the auto-delete logic */
+        unsigned long wait_time_stamp;
+        int waiting;
+
+        /* seen and not seen events */
+        struct list_head events_to_get;
+        struct list_head events_to_see;
+};
+
+struct event_data {
+        struct list_head node;
+        uint32_t type;
+        uint32_t immed_dat;
+        void *data;
+        uint32_t len;
+};
+
+static struct lpfc_ct_event *
+lpfc_ct_event_new(int ev_reg_id, uint32_t ev_req_id)
+{
+        struct lpfc_ct_event *evt = kzalloc(sizeof(*evt), GFP_KERNEL);
+        if (!evt)
+                return NULL;
+
+        INIT_LIST_HEAD(&evt->events_to_get);
+        INIT_LIST_HEAD(&evt->events_to_see);
+        evt->req_id = ev_req_id;
+        evt->reg_id = ev_reg_id;
+        evt->wait_time_stamp = jiffies;
+        init_waitqueue_head(&evt->wq);
+
+        return evt;
+}
+
+static void
+lpfc_ct_event_free(struct lpfc_ct_event *evt)
+{
+        struct event_data *ed;
+
+        list_del(&evt->node);
+
+        while (!list_empty(&evt->events_to_get)) {
+                ed = list_entry(evt->events_to_get.next, typeof(*ed), node);
+                list_del(&ed->node);
+                kfree(ed->data);
+                kfree(ed);
+        }
+
+        while (!list_empty(&evt->events_to_see)) {
+                ed = list_entry(evt->events_to_see.next, typeof(*ed), node);
+                list_del(&ed->node);
+                kfree(ed->data);
+                kfree(ed);
+        }
+
+        kfree(evt);
+}
+
+static inline void
+lpfc_ct_event_ref(struct lpfc_ct_event *evt)
+{
+        evt->ref++;
+}
+
+static inline void
+lpfc_ct_event_unref(struct lpfc_ct_event *evt)
+{
+        if (--evt->ref < 0)
+                lpfc_ct_event_free(evt);
+}
+
+#define SLI_CT_ELX_LOOPBACK 0x10
+
+enum ELX_LOOPBACK_CMD {
+        ELX_LOOPBACK_XRI_SETUP,
+        ELX_LOOPBACK_DATA,
+};
+
+/**
+ * lpfc_bsg_ct_unsol_event - process an unsolicited CT command
+ * @phba:
+ * @pring:
+ * @piocbq:
+ *
+ * This function is called when an unsolicited CT command is received.  It
+ * forwards the event to any processes registerd to receive CT events.
+ */
+void
+lpfc_bsg_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
+                        struct lpfc_iocbq *piocbq)
+{
+        uint32_t evt_req_id = 0;
+        uint32_t cmd;
+        uint32_t len;
+        struct lpfc_dmabuf *dmabuf = NULL;
+        struct lpfc_ct_event *evt;
+        struct event_data *evt_dat = NULL;
+        struct lpfc_iocbq *iocbq;
+        size_t offset = 0;
+        struct list_head head;
+        struct ulp_bde64 *bde;
+        dma_addr_t dma_addr;
+        int i;
+        struct lpfc_dmabuf *bdeBuf1 = piocbq->context2;
+        struct lpfc_dmabuf *bdeBuf2 = piocbq->context3;
+        struct lpfc_hbq_entry *hbqe;
+        struct lpfc_sli_ct_request *ct_req;
+
+        INIT_LIST_HEAD(&head);
+        list_add_tail(&head, &piocbq->list);
+
+        if (piocbq->iocb.ulpBdeCount == 0 ||
+            piocbq->iocb.un.cont64[0].tus.f.bdeSize == 0)
+                goto error_ct_unsol_exit;
+
+        if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED)
+                dmabuf = bdeBuf1;
+        else {
+                dma_addr = getPaddr(piocbq->iocb.un.cont64[0].addrHigh,
+                                    piocbq->iocb.un.cont64[0].addrLow);
+                dmabuf = lpfc_sli_ringpostbuf_get(phba, pring, dma_addr);
+        }
+
+        ct_req = (struct lpfc_sli_ct_request *)dmabuf->virt;
+        evt_req_id = ct_req->FsType;
+        cmd = ct_req->CommandResponse.bits.CmdRsp;
+        len = ct_req->CommandResponse.bits.Size;
+        if (!(phba->sli3_options & LPFC_SLI3_HBQ_ENABLED))
+                lpfc_sli_ringpostbuf_put(phba, pring, dmabuf);
+
+        mutex_lock(&phba->ct_event_mutex);
+        list_for_each_entry(evt, &phba->ct_ev_waiters, node) {
+                if (evt->req_id != evt_req_id)
+                        continue;
+
+                lpfc_ct_event_ref(evt);
+
+                evt_dat = kzalloc(sizeof(*evt_dat), GFP_KERNEL);
+                if (!evt_dat) {
+                        lpfc_ct_event_unref(evt);
+                        lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
+                                        "2614 Memory allocation failed for "
+                                        "CT event\n");
+                        break;
+                }
+
+                mutex_unlock(&phba->ct_event_mutex);
+
+                if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
+                        /* take accumulated byte count from the last iocbq */
+                        iocbq = list_entry(head.prev, typeof(*iocbq), list);
+                        evt_dat->len = iocbq->iocb.unsli3.rcvsli3.acc_len;
+                } else {
+                        list_for_each_entry(iocbq, &head, list) {
+                                for (i = 0; i < iocbq->iocb.ulpBdeCount; i++)
+                                        evt_dat->len +=
+                                        iocbq->iocb.un.cont64[i].tus.f.bdeSize;
+                        }
+                }
+
+                evt_dat->data = kzalloc(evt_dat->len, GFP_KERNEL);
+                if (!evt_dat->data) {
+                        lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
+                                        "2615 Memory allocation failed for "
+                                        "CT event data, size %d\n",
+                                        evt_dat->len);
+                        kfree(evt_dat);
+                        mutex_lock(&phba->ct_event_mutex);
+                        lpfc_ct_event_unref(evt);
+                        mutex_unlock(&phba->ct_event_mutex);
+                        goto error_ct_unsol_exit;
+                }
+
+                list_for_each_entry(iocbq, &head, list) {
+                        if (phba->sli3_options & LPFC_SLI3_HBQ_ENABLED) {
+                                bdeBuf1 = iocbq->context2;
+                                bdeBuf2 = iocbq->context3;
+                        }
+                        for (i = 0; i < iocbq->iocb.ulpBdeCount; i++) {
+                                int size = 0;
+                                if (phba->sli3_options &
+                                    LPFC_SLI3_HBQ_ENABLED) {
+                                        if (i == 0) {
+                                                hbqe = (struct lpfc_hbq_entry *)
+                                                  &iocbq->iocb.un.ulpWord[0];
+                                                size = hbqe->bde.tus.f.bdeSize;
+                                                dmabuf = bdeBuf1;
+                                        } else if (i == 1) {
+                                                hbqe = (struct lpfc_hbq_entry *)
+                                                        &iocbq->iocb.unsli3.
+                                                        sli3Words[4];
+                                                size = hbqe->bde.tus.f.bdeSize;
+                                                dmabuf = bdeBuf2;
+                                        }
+                                        if ((offset + size) > evt_dat->len)
+                                                size = evt_dat->len - offset;
+                                } else {
+                                        size = iocbq->iocb.un.cont64[i].
+                                                tus.f.bdeSize;
+                                        bde = &iocbq->iocb.un.cont64[i];
+                                        dma_addr = getPaddr(bde->addrHigh,
+                                                            bde->addrLow);
+                                        dmabuf = lpfc_sli_ringpostbuf_get(phba,
+                                                        pring, dma_addr);
+                                }
+                                if (!dmabuf) {
+                                        lpfc_printf_log(phba, KERN_ERR,
+                                                LOG_LIBDFC, "2616 No dmabuf "
+                                                "found for iocbq 0x%p\n",
+                                                iocbq);
+                                        kfree(evt_dat->data);
+                                        kfree(evt_dat);
+                                        mutex_lock(&phba->ct_event_mutex);
+                                        lpfc_ct_event_unref(evt);
+                                        mutex_unlock(&phba->ct_event_mutex);
+                                        goto error_ct_unsol_exit;
+                                }
+                                memcpy((char *)(evt_dat->data) + offset,
+                                       dmabuf->virt, size);
+                                offset += size;
+                                if (evt_req_id != SLI_CT_ELX_LOOPBACK &&
+                                    !(phba->sli3_options &
+                                      LPFC_SLI3_HBQ_ENABLED)) {
+                                        lpfc_sli_ringpostbuf_put(phba, pring,
+                                                                 dmabuf);
+                                } else {
+                                        switch (cmd) {
+                                        case ELX_LOOPBACK_XRI_SETUP:
+                                                if (!(phba->sli3_options &
+                                                      LPFC_SLI3_HBQ_ENABLED))
+                                                        lpfc_post_buffer(phba,
+                                                                         pring,
+                                                                         1);
+                                                else
+                                                        lpfc_in_buf_free(phba,
+                                                                        dmabuf);
+                                                break;
+                                        default:
+                                                if (!(phba->sli3_options &
+                                                      LPFC_SLI3_HBQ_ENABLED))
+                                                        lpfc_post_buffer(phba,
+                                                                         pring,
+                                                                         1);
+                                                break;
+                                        }
+                                }
+                        }
+                }
+
+                mutex_lock(&phba->ct_event_mutex);
+                if (phba->sli_rev == LPFC_SLI_REV4) {
+                        evt_dat->immed_dat = phba->ctx_idx;
+                        phba->ctx_idx = (phba->ctx_idx + 1) % 64;
+                        phba->ct_ctx[evt_dat->immed_dat].oxid =
+                                                piocbq->iocb.ulpContext;
+                        phba->ct_ctx[evt_dat->immed_dat].SID =
+                                piocbq->iocb.un.rcvels.remoteID;
+                } else
+                        evt_dat->immed_dat = piocbq->iocb.ulpContext;
+
+                evt_dat->type = FC_REG_CT_EVENT;
+                list_add(&evt_dat->node, &evt->events_to_see);
+                wake_up_interruptible(&evt->wq);
+                lpfc_ct_event_unref(evt);
+                if (evt_req_id == SLI_CT_ELX_LOOPBACK)
+                        break;
+        }
+        mutex_unlock(&phba->ct_event_mutex);
+
+error_ct_unsol_exit:
+        if (!list_empty(&head))
+                list_del(&head);
+
+        return;
+}
+
+/**
+ * lpfc_bsg_set_event - process a SET_EVENT bsg vendor command
+ * @job: SET_EVENT fc_bsg_job
+ */
+static int
+lpfc_bsg_set_event(struct fc_bsg_job *job)
+{
+        struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
+        struct lpfc_hba *phba = vport->phba;
+        struct set_ct_event *event_req;
+        struct lpfc_ct_event *evt;
+        int rc = 0;
+
+        if (job->request_len <
+            sizeof(struct fc_bsg_request) + sizeof(struct set_ct_event)) {
+                lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
+                                "2612 Received SET_CT_EVENT below minimum "
+                                "size\n");
+                return -EINVAL;
+        }
+
+        event_req = (struct set_ct_event *)
+                job->request->rqst_data.h_vendor.vendor_cmd;
+
+        mutex_lock(&phba->ct_event_mutex);
+        list_for_each_entry(evt, &phba->ct_ev_waiters, node) {
+                if (evt->reg_id == event_req->ev_reg_id) {
+                        lpfc_ct_event_ref(evt);
+                        evt->wait_time_stamp = jiffies;
+                        break;
+                }
+        }
+        mutex_unlock(&phba->ct_event_mutex);
+
+        if (&evt->node == &phba->ct_ev_waiters) {
+                /* no event waiting struct yet - first call */
+                evt = lpfc_ct_event_new(event_req->ev_reg_id,
+                                        event_req->ev_req_id);
+                if (!evt) {
+                        lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
+                                        "2617 Failed allocation of event "
+                                        "waiter\n");
+                        return -ENOMEM;
+                }
+
+                mutex_lock(&phba->ct_event_mutex);
+                list_add(&evt->node, &phba->ct_ev_waiters);
+                lpfc_ct_event_ref(evt);
+                mutex_unlock(&phba->ct_event_mutex);
+        }
+
+        evt->waiting = 1;
+        if (wait_event_interruptible(evt->wq,
+                                     !list_empty(&evt->events_to_see))) {
+                mutex_lock(&phba->ct_event_mutex);
+                lpfc_ct_event_unref(evt); /* release ref */
+                lpfc_ct_event_unref(evt); /* delete */
+                mutex_unlock(&phba->ct_event_mutex);
+                rc = -EINTR;
+                goto set_event_out;
+        }
+
+        evt->wait_time_stamp = jiffies;
+        evt->waiting = 0;
+
+        mutex_lock(&phba->ct_event_mutex);
+        list_move(evt->events_to_see.prev, &evt->events_to_get);
+        lpfc_ct_event_unref(evt); /* release ref */
+        mutex_unlock(&phba->ct_event_mutex);
+
+set_event_out:
+        /* set_event carries no reply payload */
+        job->reply->reply_payload_rcv_len = 0;
+        /* make error code available to userspace */
+        job->reply->result = rc;
+        /* complete the job back to userspace */
+        job->job_done(job);
+
+        return 0;
+}
+
+/**
+ * lpfc_bsg_get_event - process a GET_EVENT bsg vendor command
+ * @job: GET_EVENT fc_bsg_job
+ */
+static int
+lpfc_bsg_get_event(struct fc_bsg_job *job)
+{
+        struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
+        struct lpfc_hba *phba = vport->phba;
+        struct get_ct_event *event_req;
+        struct get_ct_event_reply *event_reply;
+        struct lpfc_ct_event *evt;
+        struct event_data *evt_dat = NULL;
+        int rc = 0;
+
+        if (job->request_len <
+            sizeof(struct fc_bsg_request) + sizeof(struct get_ct_event)) {
+                lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
+                                "2613 Received GET_CT_EVENT request below "
+                                "minimum size\n");
+                return -EINVAL;
+        }
+
+        event_req = (struct get_ct_event *)
+                job->request->rqst_data.h_vendor.vendor_cmd;
+
+        event_reply = (struct get_ct_event_reply *)
+                job->reply->reply_data.vendor_reply.vendor_rsp;
+
+        mutex_lock(&phba->ct_event_mutex);
+        list_for_each_entry(evt, &phba->ct_ev_waiters, node) {
+                if (evt->reg_id == event_req->ev_reg_id) {
+                        if (list_empty(&evt->events_to_get))
+                                break;
+                        lpfc_ct_event_ref(evt);
+                        evt->wait_time_stamp = jiffies;
+                        evt_dat = list_entry(evt->events_to_get.prev,
+                                             struct event_data, node);
+                        list_del(&evt_dat->node);
+                        break;
+                }
+        }
+        mutex_unlock(&phba->ct_event_mutex);
+
+        if (!evt_dat) {
+                job->reply->reply_payload_rcv_len = 0;
+                rc = -ENOENT;
+                goto error_get_event_exit;
+        }
+
+        if (evt_dat->len > job->reply_payload.payload_len) {
+                evt_dat->len = job->reply_payload.payload_len;
+                        lpfc_printf_log(phba, KERN_WARNING, LOG_LIBDFC,
+                                        "2618 Truncated event data at %d "
+                                        "bytes\n",
+                                        job->reply_payload.payload_len);
+        }
+
+        event_reply->immed_data = evt_dat->immed_dat;
+
+        if (evt_dat->len > 0)
+                job->reply->reply_payload_rcv_len =
+                        sg_copy_from_buffer(job->reply_payload.sg_list,
+                                            job->reply_payload.sg_cnt,
+                                            evt_dat->data, evt_dat->len);
+        else
+                job->reply->reply_payload_rcv_len = 0;
+        rc = 0;
+
+        if (evt_dat)
+                kfree(evt_dat->data);
+        kfree(evt_dat);
+        mutex_lock(&phba->ct_event_mutex);
+        lpfc_ct_event_unref(evt);
+        mutex_unlock(&phba->ct_event_mutex);
+
+error_get_event_exit:
+        /* make error code available to userspace */
+        job->reply->result = rc;
+        /* complete the job back to userspace */
+        job->job_done(job);
+
+        return rc;
+}
+
+/**
+ * lpfc_bsg_hst_vendor - process a vendor-specific fc_bsg_job
+ * @job: fc_bsg_job to handle
+ */
+static int
+lpfc_bsg_hst_vendor(struct fc_bsg_job *job)
+{
+        int command = job->request->rqst_data.h_vendor.vendor_cmd[0];
+
+        switch (command) {
+        case LPFC_BSG_VENDOR_SET_CT_EVENT:
+                return lpfc_bsg_set_event(job);
+                break;
+
+        case LPFC_BSG_VENDOR_GET_CT_EVENT:
+                return lpfc_bsg_get_event(job);
+                break;
+
+        default:
+                return -EINVAL;
+        }
+}
+
+/**
+ * lpfc_bsg_request - handle a bsg request from the FC transport
+ * @job: fc_bsg_job to handle
+ */
+int
+lpfc_bsg_request(struct fc_bsg_job *job)
+{
+        uint32_t msgcode;
+        int rc = -EINVAL;
+
+        msgcode = job->request->msgcode;
+
+        switch (msgcode) {
+        case FC_BSG_HST_VENDOR:
+                rc = lpfc_bsg_hst_vendor(job);
+                break;
+        case FC_BSG_RPT_ELS:
+                rc = lpfc_bsg_rport_els(job);
+                break;
+        case FC_BSG_RPT_CT:
+                rc = lpfc_bsg_rport_ct(job);
+                break;
+        default:
+                break;
+        }
+
+        return rc;
+}
+
+/**
+ * lpfc_bsg_timeout - handle timeout of a bsg request from the FC transport
+ * @job: fc_bsg_job that has timed out
+ *
+ * This function just aborts the job's IOCB.  The aborted IOCB will return to
+ * the waiting function which will handle passing the error back to userspace
+ */
+int
+lpfc_bsg_timeout(struct fc_bsg_job *job)
+{
+        struct lpfc_vport *vport = (struct lpfc_vport *)job->shost->hostdata;
+        struct lpfc_hba *phba = vport->phba;
+        struct lpfc_iocbq *cmdiocb = (struct lpfc_iocbq *)job->dd_data;
+        struct lpfc_sli_ring *pring = &phba->sli.ring[LPFC_ELS_RING];
+
+        if (cmdiocb)
+                lpfc_sli_issue_abort_iotag(phba, pring, cmdiocb);
+
+        return 0;
+}
diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index d2a922997c0f..0830f37409a3 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -21,9 +21,11 @@
 typedef int (*node_filter)(struct lpfc_nodelist *, void *);
 
 struct fc_rport;
-void lpfc_dump_mem(struct lpfc_hba *, LPFC_MBOXQ_t *, uint16_t);
+void lpfc_down_link(struct lpfc_hba *, LPFC_MBOXQ_t *);
+void lpfc_sli_read_link_ste(struct lpfc_hba *);
+void lpfc_dump_mem(struct lpfc_hba *, LPFC_MBOXQ_t *, uint16_t, uint16_t);
 void lpfc_dump_wakeup_param(struct lpfc_hba *, LPFC_MBOXQ_t *);
-void lpfc_dump_static_vport(struct lpfc_hba *, LPFC_MBOXQ_t *, uint16_t);
+int lpfc_dump_static_vport(struct lpfc_hba *, LPFC_MBOXQ_t *, uint16_t);
 int lpfc_dump_fcoe_param(struct lpfc_hba *, struct lpfcMboxq *);
 void lpfc_read_nv(struct lpfc_hba *, LPFC_MBOXQ_t *);
 void lpfc_config_async(struct lpfc_hba *, LPFC_MBOXQ_t *, uint32_t);
@@ -135,6 +137,9 @@ int lpfc_els_disc_adisc(struct lpfc_vport *);
 int lpfc_els_disc_plogi(struct lpfc_vport *);
 void lpfc_els_timeout(unsigned long);
 void lpfc_els_timeout_handler(struct lpfc_vport *);
+struct lpfc_iocbq *lpfc_prep_els_iocb(struct lpfc_vport *, uint8_t, uint16_t,
+                                      uint8_t, struct lpfc_nodelist *,
+                                      uint32_t, uint32_t);
 void lpfc_hb_timeout_handler(struct lpfc_hba *);
 
 void lpfc_ct_unsol_event(struct lpfc_hba *, struct lpfc_sli_ring *,
@@ -182,11 +187,12 @@ int lpfc_mbox_dev_check(struct lpfc_hba *);
 int lpfc_mbox_tmo_val(struct lpfc_hba *, int);
 void lpfc_init_vfi(struct lpfcMboxq *, struct lpfc_vport *);
 void lpfc_reg_vfi(struct lpfcMboxq *, struct lpfc_vport *, dma_addr_t);
-void lpfc_init_vpi(struct lpfcMboxq *, uint16_t);
+void lpfc_init_vpi(struct lpfc_hba *, struct lpfcMboxq *, uint16_t);
 void lpfc_unreg_vfi(struct lpfcMboxq *, uint16_t);
 void lpfc_reg_fcfi(struct lpfc_hba *, struct lpfcMboxq *);
 void lpfc_unreg_fcfi(struct lpfcMboxq *, uint16_t);
 void lpfc_resume_rpi(struct lpfcMboxq *, struct lpfc_nodelist *);
+int lpfc_check_pending_fcoe_event(struct lpfc_hba *, uint8_t);
 
 void lpfc_config_hbq(struct lpfc_hba *, uint32_t, struct lpfc_hbq_init *,
         uint32_t , LPFC_MBOXQ_t *);
@@ -234,6 +240,7 @@ void lpfc_sli_def_mbox_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
 int lpfc_sli_issue_iocb(struct lpfc_hba *, uint32_t,
                         struct lpfc_iocbq *, uint32_t);
 void lpfc_sli_pcimem_bcopy(void *, void *, uint32_t);
+void lpfc_sli_bemem_bcopy(void *, void *, uint32_t);
 void lpfc_sli_abort_iocb_ring(struct lpfc_hba *, struct lpfc_sli_ring *);
 void lpfc_sli_flush_fcp_rings(struct lpfc_hba *);
 int lpfc_sli_ringpostbuf_put(struct lpfc_hba *, struct lpfc_sli_ring *,
@@ -360,3 +367,8 @@ void lpfc_start_fdiscs(struct lpfc_hba *phba);
 #define HBA_EVENT_LINK_UP                2
 #define HBA_EVENT_LINK_DOWN              3
 
+/* functions to support SGIOv4/bsg interface */
+int lpfc_bsg_request(struct fc_bsg_job *);
+int lpfc_bsg_timeout(struct fc_bsg_job *);
+void lpfc_bsg_ct_unsol_event(struct lpfc_hba *, struct lpfc_sli_ring *,
+                             struct lpfc_iocbq *);
diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index 0e532f072eb3..9df7ed38e1be 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -97,6 +97,8 @@ lpfc_ct_unsol_event(struct lpfc_hba *phba, struct lpfc_sli_ring *pring,
         struct list_head head;
         struct lpfc_dmabuf *bdeBuf;
 
+        lpfc_bsg_ct_unsol_event(phba, pring, piocbq);
+
         if (unlikely(icmd->ulpStatus == IOSTAT_NEED_BUFFER)) {
                 lpfc_sli_hbqbuf_add_hbqs(phba, LPFC_ELS_HBQ);
         } else if ((icmd->ulpStatus == IOSTAT_LOCAL_REJECT) &&
diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c
index f72fdf23bf1b..45337cd23feb 100644
--- a/drivers/scsi/lpfc/lpfc_els.c
+++ b/drivers/scsi/lpfc/lpfc_els.c
@@ -146,7 +146,7 @@ lpfc_els_chk_latt(struct lpfc_vport *vport)
  *   Pointer to the newly allocated/prepared els iocb data structure
  *   NULL - when els iocb data structure allocation/preparation failed
  **/
-static struct lpfc_iocbq *
+struct lpfc_iocbq *
 lpfc_prep_els_iocb(struct lpfc_vport *vport, uint8_t expectRsp,
                    uint16_t cmdSize, uint8_t retry,
                    struct lpfc_nodelist *ndlp, uint32_t did,
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index ed46b24a3380..e6a47e25b218 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -61,6 +61,7 @@ static uint8_t lpfcAlpaArray[] = {
 
 static void lpfc_disc_timeout_handler(struct lpfc_vport *);
 static void lpfc_disc_flush_list(struct lpfc_vport *vport);
+static void lpfc_unregister_fcfi_cmpl(struct lpfc_hba *, LPFC_MBOXQ_t *);
 
 void
 lpfc_terminate_rport_io(struct fc_rport *rport)
@@ -1009,9 +1010,15 @@ lpfc_mbx_cmpl_reg_fcfi(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
         spin_lock_irqsave(&phba->hbalock, flags);
         phba->fcf.fcf_flag |= FCF_REGISTERED;
         spin_unlock_irqrestore(&phba->hbalock, flags);
+        /* If there is a pending FCoE event, restart FCF table scan. */
+        if (lpfc_check_pending_fcoe_event(phba, 1)) {
+                mempool_free(mboxq, phba->mbox_mem_pool);
+                return;
+        }
         if (vport->port_state != LPFC_FLOGI) {
                 spin_lock_irqsave(&phba->hbalock, flags);
                 phba->fcf.fcf_flag |= (FCF_DISCOVERED | FCF_IN_USE);
+                phba->hba_flag &= ~FCF_DISC_INPROGRESS;
                 spin_unlock_irqrestore(&phba->hbalock, flags);
                 lpfc_initial_flogi(vport);
         }
@@ -1054,6 +1061,39 @@ lpfc_fab_name_match(uint8_t *fab_name, struct fcf_record *new_fcf_record)
 }
 
 /**
+ * lpfc_sw_name_match - Check if the fcf switch name match.
+ * @fab_name: pointer to fabric name.
+ * @new_fcf_record: pointer to fcf record.
+ *
+ * This routine compare the fcf record's switch name with provided
+ * switch name. If the switch name are identical this function
+ * returns 1 else return 0.
+ **/
+static uint32_t
+lpfc_sw_name_match(uint8_t *sw_name, struct fcf_record *new_fcf_record)
+{
+        if ((sw_name[0] ==
+                bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record)) &&
+            (sw_name[1] ==
+                bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record)) &&
+            (sw_name[2] ==
+                bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record)) &&
+            (sw_name[3] ==
+                bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record)) &&
+            (sw_name[4] ==
+                bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record)) &&
+            (sw_name[5] ==
+                bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record)) &&
+            (sw_name[6] ==
+                bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record)) &&
+            (sw_name[7] ==
+                bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record)))
+                return 1;
+        else
+                return 0;
+}
+
+/**
  * lpfc_mac_addr_match - Check if the fcf mac address match.
  * @phba: pointer to lpfc hba data structure.
  * @new_fcf_record: pointer to fcf record.
@@ -1123,6 +1163,22 @@ lpfc_copy_fcf_record(struct lpfc_hba *phba, struct fcf_record *new_fcf_record)
                 bf_get(lpfc_fcf_record_mac_5, new_fcf_record);
         phba->fcf.fcf_indx = bf_get(lpfc_fcf_record_fcf_index, new_fcf_record);
         phba->fcf.priority = new_fcf_record->fip_priority;
+        phba->fcf.switch_name[0] =
+                bf_get(lpfc_fcf_record_switch_name_0, new_fcf_record);
+        phba->fcf.switch_name[1] =
+                bf_get(lpfc_fcf_record_switch_name_1, new_fcf_record);
+        phba->fcf.switch_name[2] =
+                bf_get(lpfc_fcf_record_switch_name_2, new_fcf_record);
+        phba->fcf.switch_name[3] =
+                bf_get(lpfc_fcf_record_switch_name_3, new_fcf_record);
+        phba->fcf.switch_name[4] =
+                bf_get(lpfc_fcf_record_switch_name_4, new_fcf_record);
+        phba->fcf.switch_name[5] =
+                bf_get(lpfc_fcf_record_switch_name_5, new_fcf_record);
+        phba->fcf.switch_name[6] =
+                bf_get(lpfc_fcf_record_switch_name_6, new_fcf_record);
+        phba->fcf.switch_name[7] =
+                bf_get(lpfc_fcf_record_switch_name_7, new_fcf_record);
 }
 
 /**
@@ -1150,6 +1206,7 @@ lpfc_register_fcf(struct lpfc_hba *phba)
         /* The FCF is already registered, start discovery */
         if (phba->fcf.fcf_flag & FCF_REGISTERED) {
                 phba->fcf.fcf_flag |= (FCF_DISCOVERED | FCF_IN_USE);
+                phba->hba_flag &= ~FCF_DISC_INPROGRESS;
                 spin_unlock_irqrestore(&phba->hbalock, flags);
                 if (phba->pport->port_state != LPFC_FLOGI)
                         lpfc_initial_flogi(phba->pport);
@@ -1239,9 +1296,12 @@ lpfc_match_fcf_conn_list(struct lpfc_hba *phba,
 
                 if ((conn_entry->conn_rec.flags & FCFCNCT_FBNM_VALID) &&
                         !lpfc_fab_name_match(conn_entry->conn_rec.fabric_name,
-                                new_fcf_record))
+                                             new_fcf_record))
+                        continue;
+                if ((conn_entry->conn_rec.flags & FCFCNCT_SWNM_VALID) &&
+                        !lpfc_sw_name_match(conn_entry->conn_rec.switch_name,
+                                            new_fcf_record))
                         continue;
-
                 if (conn_entry->conn_rec.flags & FCFCNCT_VLAN_VALID) {
                         /*
                          * If the vlan bit map does not have the bit set for the
@@ -1336,6 +1396,60 @@ lpfc_match_fcf_conn_list(struct lpfc_hba *phba,
 }
 
 /**
+ * lpfc_check_pending_fcoe_event - Check if there is pending fcoe event.
+ * @phba: pointer to lpfc hba data structure.
+ * @unreg_fcf: Unregister FCF if FCF table need to be re-scaned.
+ *
+ * This function check if there is any fcoe event pending while driver
+ * scan FCF entries. If there is any pending event, it will restart the
+ * FCF saning and return 1 else return 0.
+ */
+int
+lpfc_check_pending_fcoe_event(struct lpfc_hba *phba, uint8_t unreg_fcf)
+{
+        LPFC_MBOXQ_t *mbox;
+        int rc;
+        /*
+         * If the Link is up and no FCoE events while in the
+         * FCF discovery, no need to restart FCF discovery.
+         */
+        if ((phba->link_state  >= LPFC_LINK_UP) &&
+                (phba->fcoe_eventtag == phba->fcoe_eventtag_at_fcf_scan))
+                return 0;
+
+        spin_lock_irq(&phba->hbalock);
+        phba->fcf.fcf_flag &= ~FCF_AVAILABLE;
+        spin_unlock_irq(&phba->hbalock);
+
+        if (phba->link_state >= LPFC_LINK_UP)
+                lpfc_sli4_read_fcf_record(phba, LPFC_FCOE_FCF_GET_FIRST);
+
+        if (unreg_fcf) {
+                spin_lock_irq(&phba->hbalock);
+                phba->fcf.fcf_flag &= ~FCF_REGISTERED;
+                spin_unlock_irq(&phba->hbalock);
+                mbox = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+                if (!mbox) {
+                        lpfc_printf_log(phba, KERN_ERR,
+                                LOG_DISCOVERY|LOG_MBOX,
+                                "2610 UNREG_FCFI mbox allocation failed\n");
+                        return 1;
+                }
+                lpfc_unreg_fcfi(mbox, phba->fcf.fcfi);
+                mbox->vport = phba->pport;
+                mbox->mbox_cmpl = lpfc_unregister_fcfi_cmpl;
+                rc = lpfc_sli_issue_mbox(phba, mbox, MBX_NOWAIT);
+                if (rc == MBX_NOT_FINISHED) {
+                        lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY|LOG_MBOX,
+                                "2611 UNREG_FCFI issue mbox failed\n");
+                        mempool_free(mbox, phba->mbox_mem_pool);
+                }
+        }
+
+        return 1;
+}
+
+/**
  * lpfc_mbx_cmpl_read_fcf_record - Completion handler for read_fcf mbox.
  * @phba: pointer to lpfc hba data structure.
  * @mboxq: pointer to mailbox object.
@@ -1367,6 +1481,12 @@ lpfc_mbx_cmpl_read_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
         unsigned long flags;
         uint16_t vlan_id;
 
+        /* If there is pending FCoE event restart FCF table scan */
+        if (lpfc_check_pending_fcoe_event(phba, 0)) {
+                lpfc_sli4_mbox_cmd_free(phba, mboxq);
+                return;
+        }
+
         /* Get the first SGE entry from the non-embedded DMA memory. This
          * routine only uses a single SGE.
          */
@@ -1424,7 +1544,9 @@ lpfc_mbx_cmpl_read_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
         spin_lock_irqsave(&phba->hbalock, flags);
         if (phba->fcf.fcf_flag & FCF_IN_USE) {
                 if (lpfc_fab_name_match(phba->fcf.fabric_name,
-                        new_fcf_record) &&
+                                        new_fcf_record) &&
+                    lpfc_sw_name_match(phba->fcf.switch_name,
+                                        new_fcf_record) &&
                     lpfc_mac_addr_match(phba, new_fcf_record)) {
                         phba->fcf.fcf_flag |= FCF_AVAILABLE;
                         spin_unlock_irqrestore(&phba->hbalock, flags);
@@ -1464,9 +1586,9 @@ lpfc_mbx_cmpl_read_fcf_record(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
                  * If there is a record with lower priority value for
                  * the current FCF, use that record.
                  */
-                if (lpfc_fab_name_match(phba->fcf.fabric_name, new_fcf_record)
-                        && (new_fcf_record->fip_priority <
-                                phba->fcf.priority)) {
+                if (lpfc_fab_name_match(phba->fcf.fabric_name,
+                                        new_fcf_record) &&
+                    (new_fcf_record->fip_priority < phba->fcf.priority)) {
                         /* Use this FCF record */
                         lpfc_copy_fcf_record(phba, new_fcf_record);
                         phba->fcf.addr_mode = addr_mode;
@@ -1512,6 +1634,39 @@ out:
 }
 
 /**
+ * lpfc_init_vpi_cmpl - Completion handler for init_vpi mbox command.
+ * @phba: pointer to lpfc hba data structure.
+ * @mboxq: pointer to mailbox data structure.
+ *
+ * This function handles completion of init vpi mailbox command.
+ */
+static void
+lpfc_init_vpi_cmpl(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
+{
+        struct lpfc_vport *vport = mboxq->vport;
+        if (mboxq->u.mb.mbxStatus) {
+                lpfc_printf_vlog(vport, KERN_ERR,
+                                LOG_MBOX,
+                                "2609 Init VPI mailbox failed 0x%x\n",
+                                mboxq->u.mb.mbxStatus);
+                mempool_free(mboxq, phba->mbox_mem_pool);
+                lpfc_vport_set_state(vport, FC_VPORT_FAILED);
+                return;
+        }
+        vport->fc_flag &= ~FC_VPORT_NEEDS_INIT_VPI;
+
+        if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
+                lpfc_initial_fdisc(vport);
+        else {
+                lpfc_vport_set_state(vport, FC_VPORT_NO_FABRIC_SUPP);
+                lpfc_printf_vlog(vport, KERN_ERR,
+                        LOG_ELS,
+                        "2606 No NPIV Fabric support\n");
+        }
+        return;
+}
+
+/**
  * lpfc_start_fdiscs - send fdiscs for each vports on this port.
  * @phba: pointer to lpfc hba data structure.
  *
@@ -1523,6 +1678,8 @@ lpfc_start_fdiscs(struct lpfc_hba *phba)
 {
         struct lpfc_vport **vports;
         int i;
+        LPFC_MBOXQ_t *mboxq;
+        int rc;
 
         vports = lpfc_create_vport_work_array(phba);
         if (vports != NULL) {
@@ -1540,6 +1697,29 @@ lpfc_start_fdiscs(struct lpfc_hba *phba)
                                                      FC_VPORT_LINKDOWN);
                                 continue;
                         }
+                        if (vports[i]->fc_flag & FC_VPORT_NEEDS_INIT_VPI) {
+                                mboxq = mempool_alloc(phba->mbox_mem_pool,
+                                        GFP_KERNEL);
+                                if (!mboxq) {
+                                        lpfc_printf_vlog(vports[i], KERN_ERR,
+                                        LOG_MBOX, "2607 Failed to allocate "
+                                        "init_vpi mailbox\n");
+                                        continue;
+                                }
+                                lpfc_init_vpi(phba, mboxq, vports[i]->vpi);
+                                mboxq->vport = vports[i];
+                                mboxq->mbox_cmpl = lpfc_init_vpi_cmpl;
+                                rc = lpfc_sli_issue_mbox(phba, mboxq,
+                                        MBX_NOWAIT);
+                                if (rc == MBX_NOT_FINISHED) {
+                                        lpfc_printf_vlog(vports[i], KERN_ERR,
+                                        LOG_MBOX, "2608 Failed to issue "
+                                        "init_vpi mailbox\n");
+                                        mempool_free(mboxq,
+                                                phba->mbox_mem_pool);
+                                }
+                                continue;
+                        }
                         if (phba->link_flag & LS_NPIV_FAB_SUPPORTED)
                                 lpfc_initial_fdisc(vports[i]);
                         else {
@@ -1769,6 +1949,7 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
                         goto out;
                 }
         } else {
+                vport->port_state = LPFC_VPORT_UNKNOWN;
                 /*
                  * Add the driver's default FCF record at FCF index 0 now. This
                  * is phase 1 implementation that support FCF index 0 and driver
@@ -1804,6 +1985,12 @@ lpfc_mbx_process_link_up(struct lpfc_hba *phba, READ_LA_VAR *la)
                  * The driver is expected to do FIP/FCF. Call the port
                  * and get the FCF Table.
                  */
+                spin_lock_irq(&phba->hbalock);
+                if (phba->hba_flag & FCF_DISC_INPROGRESS) {
+                        spin_unlock_irq(&phba->hbalock);
+                        return;
+                }
+                spin_unlock_irq(&phba->hbalock);
                 rc = lpfc_sli4_read_fcf_record(phba,
                                         LPFC_FCOE_FCF_GET_FIRST);
                 if (rc)
@@ -2113,13 +2300,15 @@ lpfc_create_static_vport(struct lpfc_hba *phba)
         LPFC_MBOXQ_t *pmb = NULL;
         MAILBOX_t *mb;
         struct static_vport_info *vport_info;
-        int rc, i;
+        int rc = 0, i;
         struct fc_vport_identifiers vport_id;
         struct fc_vport *new_fc_vport;
         struct Scsi_Host *shost;
         struct lpfc_vport *vport;
         uint16_t offset = 0;
         uint8_t *vport_buff;
+        struct lpfc_dmabuf *mp;
+        uint32_t byte_count = 0;
 
         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
         if (!pmb) {
@@ -2142,7 +2331,9 @@ lpfc_create_static_vport(struct lpfc_hba *phba)
 
         vport_buff = (uint8_t *) vport_info;
         do {
-                lpfc_dump_static_vport(phba, pmb, offset);
+                if (lpfc_dump_static_vport(phba, pmb, offset))
+                        goto out;
+
                 pmb->vport = phba->pport;
                 rc = lpfc_sli_issue_mbox_wait(phba, pmb, LPFC_MBOX_TMO);
 
@@ -2155,17 +2346,30 @@ lpfc_create_static_vport(struct lpfc_hba *phba)
                         goto out;
                 }
 
-                if (mb->un.varDmp.word_cnt >
-                        sizeof(struct static_vport_info) - offset)
-                        mb->un.varDmp.word_cnt =
-                        sizeof(struct static_vport_info) - offset;
-
-                lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
-                        vport_buff + offset,
-                        mb->un.varDmp.word_cnt);
-                offset += mb->un.varDmp.word_cnt;
+                if (phba->sli_rev == LPFC_SLI_REV4) {
+                        byte_count = pmb->u.mqe.un.mb_words[5];
+                        mp = (struct lpfc_dmabuf *) pmb->context2;
+                        if (byte_count > sizeof(struct static_vport_info) -
+                                        offset)
+                                byte_count = sizeof(struct static_vport_info)
+                                        - offset;
+                        memcpy(vport_buff + offset, mp->virt, byte_count);
+                        offset += byte_count;
+                } else {
+                        if (mb->un.varDmp.word_cnt >
+                                sizeof(struct static_vport_info) - offset)
+                                mb->un.varDmp.word_cnt =
+                                        sizeof(struct static_vport_info)
+                                                - offset;
+                        byte_count = mb->un.varDmp.word_cnt;
+                        lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
+                                vport_buff + offset,
+                                byte_count);
+
+                        offset += byte_count;
+                }
 
-        } while (mb->un.varDmp.word_cnt &&
+        } while (byte_count &&
                 offset < sizeof(struct static_vport_info));
 
 
@@ -2198,7 +2402,7 @@ lpfc_create_static_vport(struct lpfc_hba *phba)
                 if (!new_fc_vport) {
                         lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
                                 "0546 lpfc_create_static_vport failed to"
-                                " create vport \n");
+                                " create vport\n");
                         continue;
                 }
 
@@ -2207,16 +2411,15 @@ lpfc_create_static_vport(struct lpfc_hba *phba)
         }
 
 out:
-        /*
-         * If this is timed out command, setting NULL to context2 tell SLI
-         * layer not to use this buffer.
-         */
-        spin_lock_irq(&phba->hbalock);
-        pmb->context2 = NULL;
-        spin_unlock_irq(&phba->hbalock);
         kfree(vport_info);
-        if (rc != MBX_TIMEOUT)
+        if (rc != MBX_TIMEOUT) {
+                if (pmb->context2) {
+                        mp = (struct lpfc_dmabuf *) pmb->context2;
+                        lpfc_mbuf_free(phba, mp->virt, mp->phys);
+                        kfree(mp);
+                }
                 mempool_free(pmb, phba->mbox_mem_pool);
+        }
 
         return;
 }
@@ -4360,7 +4563,7 @@ lpfc_read_fcoe_param(struct lpfc_hba *phba,
         fcoe_param_hdr = (struct lpfc_fip_param_hdr *)
                 buff;
         fcoe_param = (struct lpfc_fcoe_params *)
-                buff + sizeof(struct lpfc_fip_param_hdr);
+                (buff + sizeof(struct lpfc_fip_param_hdr));
 
         if ((fcoe_param_hdr->parm_version != FIPP_VERSION) ||
                 (fcoe_param_hdr->length != FCOE_PARAM_LENGTH))
diff --git a/drivers/scsi/lpfc/lpfc_hw.h b/drivers/scsi/lpfc/lpfc_hw.h
index 8a3a026667e4..ccb26724dc53 100644
--- a/drivers/scsi/lpfc/lpfc_hw.h
+++ b/drivers/scsi/lpfc/lpfc_hw.h
@@ -2496,8 +2496,8 @@ typedef struct {
 #define  DMP_VPORT_REGION_SIZE   0x200
 #define  DMP_MBOX_OFFSET_WORD    0x5
 
-#define  DMP_REGION_FCOEPARAM    0x17   /* fcoe param region */
-#define  DMP_FCOEPARAM_RGN_SIZE  0x400
+#define  DMP_REGION_23           0x17   /* fcoe param  and port state region */
+#define  DMP_RGN23_SIZE          0x400
 
 #define  WAKE_UP_PARMS_REGION_ID    4
 #define  WAKE_UP_PARMS_WORD_SIZE   15
diff --git a/drivers/scsi/lpfc/lpfc_hw4.h b/drivers/scsi/lpfc/lpfc_hw4.h
index 2995d128f07f..3689eee04535 100644
--- a/drivers/scsi/lpfc/lpfc_hw4.h
+++ b/drivers/scsi/lpfc/lpfc_hw4.h
@@ -52,6 +52,31 @@ struct dma_address {
         uint32_t addr_hi;
 };
 
+#define LPFC_SLIREV_CONF_WORD   0x58
+struct lpfc_sli_intf {
+        uint32_t word0;
+#define lpfc_sli_intf_iftype_MASK       0x00000007
+#define lpfc_sli_intf_iftype_SHIFT      0
+#define lpfc_sli_intf_iftype_WORD       word0
+#define lpfc_sli_intf_rev_MASK          0x0000000f
+#define lpfc_sli_intf_rev_SHIFT         4
+#define lpfc_sli_intf_rev_WORD          word0
+#define LPFC_SLIREV_CONF_SLI4   4
+#define lpfc_sli_intf_family_MASK       0x000000ff
+#define lpfc_sli_intf_family_SHIFT      8
+#define lpfc_sli_intf_family_WORD       word0
+#define lpfc_sli_intf_feat1_MASK        0x000000ff
+#define lpfc_sli_intf_feat1_SHIFT       16
+#define lpfc_sli_intf_feat1_WORD        word0
+#define lpfc_sli_intf_feat2_MASK        0x0000001f
+#define lpfc_sli_intf_feat2_SHIFT       24
+#define lpfc_sli_intf_feat2_WORD        word0
+#define lpfc_sli_intf_valid_MASK        0x00000007
+#define lpfc_sli_intf_valid_SHIFT       29
+#define lpfc_sli_intf_valid_WORD        word0
+#define LPFC_SLI_INTF_VALID             6
+};
+
 #define LPFC_SLI4_BAR0          1
 #define LPFC_SLI4_BAR1          2
 #define LPFC_SLI4_BAR2          4
@@ -1181,6 +1206,32 @@ struct fcf_record {
 #define lpfc_fcf_record_fcf_state_MASK          0x0000FFFF
 #define lpfc_fcf_record_fcf_state_WORD          word8
         uint8_t vlan_bitmap[512];
+        uint32_t word137;
+#define lpfc_fcf_record_switch_name_0_SHIFT     0
+#define lpfc_fcf_record_switch_name_0_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_0_WORD      word137
+#define lpfc_fcf_record_switch_name_1_SHIFT     8
+#define lpfc_fcf_record_switch_name_1_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_1_WORD      word137
+#define lpfc_fcf_record_switch_name_2_SHIFT     16
+#define lpfc_fcf_record_switch_name_2_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_2_WORD      word137
+#define lpfc_fcf_record_switch_name_3_SHIFT     24
+#define lpfc_fcf_record_switch_name_3_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_3_WORD      word137
+        uint32_t word138;
+#define lpfc_fcf_record_switch_name_4_SHIFT     0
+#define lpfc_fcf_record_switch_name_4_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_4_WORD      word138
+#define lpfc_fcf_record_switch_name_5_SHIFT     8
+#define lpfc_fcf_record_switch_name_5_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_5_WORD      word138
+#define lpfc_fcf_record_switch_name_6_SHIFT     16
+#define lpfc_fcf_record_switch_name_6_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_6_WORD      word138
+#define lpfc_fcf_record_switch_name_7_SHIFT     24
+#define lpfc_fcf_record_switch_name_7_MASK      0x000000FF
+#define lpfc_fcf_record_switch_name_7_WORD      word138
 };
 
 struct lpfc_mbx_read_fcf_tbl {
@@ -1385,20 +1436,17 @@ struct lpfc_mbx_unreg_vfi {
 
 struct lpfc_mbx_resume_rpi {
         uint32_t word1;
-#define lpfc_resume_rpi_rpi_SHIFT       0
-#define lpfc_resume_rpi_rpi_MASK        0x0000FFFF
-#define lpfc_resume_rpi_rpi_WORD        word1
+#define lpfc_resume_rpi_index_SHIFT     0
+#define lpfc_resume_rpi_index_MASK      0x0000FFFF
+#define lpfc_resume_rpi_index_WORD      word1
+#define lpfc_resume_rpi_ii_SHIFT        30
+#define lpfc_resume_rpi_ii_MASK         0x00000003
+#define lpfc_resume_rpi_ii_WORD         word1
+#define RESUME_INDEX_RPI                0
+#define RESUME_INDEX_VPI                1
+#define RESUME_INDEX_VFI                2
+#define RESUME_INDEX_FCFI               3
         uint32_t event_tag;
-        uint32_t word3_rsvd;
-        uint32_t word4_rsvd;
-        uint32_t word5_rsvd;
-        uint32_t word6;
-#define lpfc_resume_rpi_vpi_SHIFT       0
-#define lpfc_resume_rpi_vpi_MASK        0x0000FFFF
-#define lpfc_resume_rpi_vpi_WORD        word6
-#define lpfc_resume_rpi_vfi_SHIFT       16
-#define lpfc_resume_rpi_vfi_MASK        0x0000FFFF
-#define lpfc_resume_rpi_vfi_WORD        word6
 };
 
 #define REG_FCF_INVALID_QID     0xFFFF
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index fc67cc65c63b..562d8cee874b 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -211,7 +211,7 @@ lpfc_config_port_prep(struct lpfc_hba *phba)
                 goto out_free_mbox;
 
         do {
-                lpfc_dump_mem(phba, pmb, offset);
+                lpfc_dump_mem(phba, pmb, offset, DMP_REGION_VPD);
                 rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
 
                 if (rc != MBX_SUCCESS) {
@@ -425,6 +425,9 @@ lpfc_config_port_post(struct lpfc_hba *phba)
                 return -EIO;
         }
 
+        /* Check if the port is disabled */
+        lpfc_sli_read_link_ste(phba);
+
         /* Reset the DFT_HBA_Q_DEPTH to the max xri  */
         if (phba->cfg_hba_queue_depth > (mb->un.varRdConfig.max_xri+1))
                 phba->cfg_hba_queue_depth =
@@ -524,27 +527,46 @@ lpfc_config_port_post(struct lpfc_hba *phba)
         /* Set up error attention (ERATT) polling timer */
         mod_timer(&phba->eratt_poll, jiffies + HZ * LPFC_ERATT_POLL_INTERVAL);
 
-        lpfc_init_link(phba, pmb, phba->cfg_topology, phba->cfg_link_speed);
-        pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
-        lpfc_set_loopback_flag(phba);
-        rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
-        if (rc != MBX_SUCCESS) {
-                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+        if (phba->hba_flag & LINK_DISABLED) {
+                lpfc_printf_log(phba,
+                        KERN_ERR, LOG_INIT,
+                        "2598 Adapter Link is disabled.\n");
+                lpfc_down_link(phba, pmb);
+                pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
+                if ((rc != MBX_SUCCESS) && (rc != MBX_BUSY)) {
+                        lpfc_printf_log(phba,
+                        KERN_ERR, LOG_INIT,
+                        "2599 Adapter failed to issue DOWN_LINK"
+                        " mbox command rc 0x%x\n", rc);
+
+                        mempool_free(pmb, phba->mbox_mem_pool);
+                        return -EIO;
+                }
+        } else {
+                lpfc_init_link(phba, pmb, phba->cfg_topology,
+                        phba->cfg_link_speed);
+                pmb->mbox_cmpl = lpfc_sli_def_mbox_cmpl;
+                lpfc_set_loopback_flag(phba);
+                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_NOWAIT);
+                if (rc != MBX_SUCCESS) {
+                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
                                 "0454 Adapter failed to init, mbxCmd x%x "
                                 "INIT_LINK, mbxStatus x%x\n",
                                 mb->mbxCommand, mb->mbxStatus);
 
-                /* Clear all interrupt enable conditions */
-                writel(0, phba->HCregaddr);
-                readl(phba->HCregaddr); /* flush */
-                /* Clear all pending interrupts */
-                writel(0xffffffff, phba->HAregaddr);
-                readl(phba->HAregaddr); /* flush */
+                        /* Clear all interrupt enable conditions */
+                        writel(0, phba->HCregaddr);
+                        readl(phba->HCregaddr); /* flush */
+                        /* Clear all pending interrupts */
+                        writel(0xffffffff, phba->HAregaddr);
+                        readl(phba->HAregaddr); /* flush */
 
-                phba->link_state = LPFC_HBA_ERROR;
-                if (rc != MBX_BUSY)
-                        mempool_free(pmb, phba->mbox_mem_pool);
-                return -EIO;
+                        phba->link_state = LPFC_HBA_ERROR;
+                        if (rc != MBX_BUSY)
+                                mempool_free(pmb, phba->mbox_mem_pool);
+                        return -EIO;
+                }
         }
         /* MBOX buffer will be freed in mbox compl */
         pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
@@ -558,7 +580,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
                                 KERN_ERR,
                                 LOG_INIT,
                                 "0456 Adapter failed to issue "
-                                "ASYNCEVT_ENABLE mbox status x%x \n.",
+                                "ASYNCEVT_ENABLE mbox status x%x\n",
                                 rc);
                 mempool_free(pmb, phba->mbox_mem_pool);
         }
@@ -572,7 +594,7 @@ lpfc_config_port_post(struct lpfc_hba *phba)
 
         if ((rc != MBX_BUSY) && (rc != MBX_SUCCESS)) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT, "0435 Adapter failed "
-                                "to get Option ROM version status x%x\n.", rc);
+                                "to get Option ROM version status x%x\n", rc);
                 mempool_free(pmb, phba->mbox_mem_pool);
         }
 
@@ -2133,6 +2155,8 @@ lpfc_online(struct lpfc_hba *phba)
                         vports[i]->fc_flag &= ~FC_OFFLINE_MODE;
                         if (phba->sli3_options & LPFC_SLI3_NPIV_ENABLED)
                                 vports[i]->fc_flag |= FC_VPORT_NEEDS_REG_VPI;
+                        if (phba->sli_rev == LPFC_SLI_REV4)
+                                vports[i]->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
                         spin_unlock_irq(shost->host_lock);
                 }
                 lpfc_destroy_vport_work_array(phba, vports);
@@ -2807,6 +2831,7 @@ lpfc_sli4_async_link_evt(struct lpfc_hba *phba,
         att_type = lpfc_sli4_parse_latt_type(phba, acqe_link);
         if (att_type != AT_LINK_DOWN && att_type != AT_LINK_UP)
                 return;
+        phba->fcoe_eventtag = acqe_link->event_tag;
         pmb = (LPFC_MBOXQ_t *)mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
         if (!pmb) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
@@ -2894,18 +2919,20 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
         uint8_t event_type = bf_get(lpfc_acqe_fcoe_event_type, acqe_fcoe);
         int rc;
 
+        phba->fcoe_eventtag = acqe_fcoe->event_tag;
         switch (event_type) {
         case LPFC_FCOE_EVENT_TYPE_NEW_FCF:
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
-                        "2546 New FCF found index 0x%x tag 0x%x \n",
+                        "2546 New FCF found index 0x%x tag 0x%x\n",
                         acqe_fcoe->fcf_index,
                         acqe_fcoe->event_tag);
                 /*
-                 * If the current FCF is in discovered state,
-                 * do nothing.
+                 * If the current FCF is in discovered state, or
+                 * FCF discovery is in progress do nothing.
                  */
                 spin_lock_irq(&phba->hbalock);
-                if (phba->fcf.fcf_flag & FCF_DISCOVERED) {
+                if ((phba->fcf.fcf_flag & FCF_DISCOVERED) ||
+                   (phba->hba_flag & FCF_DISC_INPROGRESS)) {
                         spin_unlock_irq(&phba->hbalock);
                         break;
                 }
@@ -2922,7 +2949,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
 
         case LPFC_FCOE_EVENT_TYPE_FCF_TABLE_FULL:
                 lpfc_printf_log(phba, KERN_ERR, LOG_SLI,
-                        "2548 FCF Table full count 0x%x tag 0x%x \n",
+                        "2548 FCF Table full count 0x%x tag 0x%x\n",
                         bf_get(lpfc_acqe_fcoe_fcf_count, acqe_fcoe),
                         acqe_fcoe->event_tag);
                 break;
@@ -2930,7 +2957,7 @@ lpfc_sli4_async_fcoe_evt(struct lpfc_hba *phba,
         case LPFC_FCOE_EVENT_TYPE_FCF_DEAD:
                 lpfc_printf_log(phba, KERN_ERR, LOG_DISCOVERY,
                         "2549 FCF disconnected fron network index 0x%x"
-                        " tag 0x%x \n", acqe_fcoe->fcf_index,
+                        " tag 0x%x\n", acqe_fcoe->fcf_index,
                         acqe_fcoe->event_tag);
                 /* If the event is not for currently used fcf do nothing */
                 if (phba->fcf.fcf_indx != acqe_fcoe->fcf_index)
@@ -4130,8 +4157,7 @@ lpfc_hba_alloc(struct pci_dev *pdev)
         /* Allocate memory for HBA structure */
         phba = kzalloc(sizeof(struct lpfc_hba), GFP_KERNEL);
         if (!phba) {
-                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
-                                "1417 Failed to allocate hba struct.\n");
+                dev_err(&pdev->dev, "failed to allocate hba struct\n");
                 return NULL;
         }
 
@@ -4145,6 +4171,9 @@ lpfc_hba_alloc(struct pci_dev *pdev)
                 return NULL;
         }
 
+        mutex_init(&phba->ct_event_mutex);
+        INIT_LIST_HEAD(&phba->ct_ev_waiters);
+
         return phba;
 }
 
@@ -4489,23 +4518,6 @@ lpfc_sli4_post_status_check(struct lpfc_hba *phba)
         if (!phba->sli4_hba.STAregaddr)
                 return -ENODEV;
 
-        /* With uncoverable error, log the error message and return error */
-        onlnreg0 = readl(phba->sli4_hba.ONLINE0regaddr);
-        onlnreg1 = readl(phba->sli4_hba.ONLINE1regaddr);
-        if ((onlnreg0 != LPFC_ONLINE_NERR) || (onlnreg1 != LPFC_ONLINE_NERR)) {
-                uerrlo_reg.word0 = readl(phba->sli4_hba.UERRLOregaddr);
-                uerrhi_reg.word0 = readl(phba->sli4_hba.UERRHIregaddr);
-                if (uerrlo_reg.word0 || uerrhi_reg.word0) {
-                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
-                                        "1422 HBA Unrecoverable error: "
-                                        "uerr_lo_reg=0x%x, uerr_hi_reg=0x%x, "
-                                        "online0_reg=0x%x, online1_reg=0x%x\n",
-                                        uerrlo_reg.word0, uerrhi_reg.word0,
-                                        onlnreg0, onlnreg1);
-                }
-                return -ENODEV;
-        }
-
         /* Wait up to 30 seconds for the SLI Port POST done and ready */
         for (i = 0; i < 3000; i++) {
                 sta_reg.word0 = readl(phba->sli4_hba.STAregaddr);
@@ -4545,6 +4557,23 @@ lpfc_sli4_post_status_check(struct lpfc_hba *phba)
                         bf_get(lpfc_scratchpad_featurelevel1, &scratchpad),
                         bf_get(lpfc_scratchpad_featurelevel2, &scratchpad));
 
+        /* With uncoverable error, log the error message and return error */
+        onlnreg0 = readl(phba->sli4_hba.ONLINE0regaddr);
+        onlnreg1 = readl(phba->sli4_hba.ONLINE1regaddr);
+        if ((onlnreg0 != LPFC_ONLINE_NERR) || (onlnreg1 != LPFC_ONLINE_NERR)) {
+                uerrlo_reg.word0 = readl(phba->sli4_hba.UERRLOregaddr);
+                uerrhi_reg.word0 = readl(phba->sli4_hba.UERRHIregaddr);
+                if (uerrlo_reg.word0 || uerrhi_reg.word0) {
+                        lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                                        "1422 HBA Unrecoverable error: "
+                                        "uerr_lo_reg=0x%x, uerr_hi_reg=0x%x, "
+                                        "online0_reg=0x%x, online1_reg=0x%x\n",
+                                        uerrlo_reg.word0, uerrhi_reg.word0,
+                                        onlnreg0, onlnreg1);
+                }
+                return -ENODEV;
+        }
+
         return port_error;
 }
 
@@ -7347,6 +7376,9 @@ lpfc_pci_probe_one_s4(struct pci_dev *pdev, const struct pci_device_id *pid)
         /* Perform post initialization setup */
         lpfc_post_init_setup(phba);
 
+        /* Check if there are static vports to be created. */
+        lpfc_create_static_vport(phba);
+
         return 0;
 
 out_disable_intr:
@@ -7636,19 +7668,17 @@ static int __devinit
 lpfc_pci_probe_one(struct pci_dev *pdev, const struct pci_device_id *pid)
 {
         int rc;
-        uint16_t dev_id;
+        struct lpfc_sli_intf intf;
 
-        if (pci_read_config_word(pdev, PCI_DEVICE_ID, &dev_id))
+        if (pci_read_config_dword(pdev, LPFC_SLIREV_CONF_WORD, &intf.word0))
                 return -ENODEV;
 
-        switch (dev_id) {
-        case PCI_DEVICE_ID_TIGERSHARK:
+        if ((bf_get(lpfc_sli_intf_valid, &intf) == LPFC_SLI_INTF_VALID) &&
+                (bf_get(lpfc_sli_intf_rev, &intf) == LPFC_SLIREV_CONF_SLI4))
                 rc = lpfc_pci_probe_one_s4(pdev, pid);
-                break;
-        default:
+        else
                 rc = lpfc_pci_probe_one_s3(pdev, pid);
-                break;
-        }
+
         return rc;
 }
 
diff --git a/drivers/scsi/lpfc/lpfc_mbox.c b/drivers/scsi/lpfc/lpfc_mbox.c
index 3423571dd1b3..1ab405902a18 100644
--- a/drivers/scsi/lpfc/lpfc_mbox.c
+++ b/drivers/scsi/lpfc/lpfc_mbox.c
@@ -52,48 +52,85 @@
  * This routine prepares the mailbox command for dumping list of static
  * vports to be created.
  **/
-void
+int
 lpfc_dump_static_vport(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb,
                 uint16_t offset)
 {
         MAILBOX_t *mb;
-        void *ctx;
+        struct lpfc_dmabuf *mp;
 
         mb = &pmb->u.mb;
-        ctx = pmb->context2;
 
         /* Setup to dump vport info region */
         memset(pmb, 0, sizeof(LPFC_MBOXQ_t));
         mb->mbxCommand = MBX_DUMP_MEMORY;
-        mb->un.varDmp.cv = 1;
         mb->un.varDmp.type = DMP_NV_PARAMS;
         mb->un.varDmp.entry_index = offset;
         mb->un.varDmp.region_id = DMP_REGION_VPORT;
-        mb->un.varDmp.word_cnt = DMP_RSP_SIZE/sizeof(uint32_t);
-        mb->un.varDmp.co = 0;
-        mb->un.varDmp.resp_offset = 0;
-        pmb->context2 = ctx;
         mb->mbxOwner = OWN_HOST;
 
-        return;
+        /* For SLI3 HBAs data is embedded in mailbox */
+        if (phba->sli_rev != LPFC_SLI_REV4) {
+                mb->un.varDmp.cv = 1;
+                mb->un.varDmp.word_cnt = DMP_RSP_SIZE/sizeof(uint32_t);
+                return 0;
+        }
+
+        /* For SLI4 HBAs driver need to allocate memory */
+        mp = kmalloc(sizeof(struct lpfc_dmabuf), GFP_KERNEL);
+        if (mp)
+                mp->virt = lpfc_mbuf_alloc(phba, 0, &mp->phys);
+
+        if (!mp || !mp->virt) {
+                kfree(mp);
+                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX,
+                        "2605 lpfc_dump_static_vport: memory"
+                        " allocation failed\n");
+                return 1;
+        }
+        memset(mp->virt, 0, LPFC_BPL_SIZE);
+        INIT_LIST_HEAD(&mp->list);
+        /* save address for completion */
+        pmb->context2 = (uint8_t *) mp;
+        mb->un.varWords[3] = putPaddrLow(mp->phys);
+        mb->un.varWords[4] = putPaddrHigh(mp->phys);
+        mb->un.varDmp.sli4_length = sizeof(struct static_vport_info);
+
+        return 0;
+}
+
+/**
+ * lpfc_down_link - Bring down HBAs link.
+ * @phba: pointer to lpfc hba data structure.
+ * @pmb: pointer to the driver internal queue element for mailbox command.
+ *
+ * This routine prepares a mailbox command to bring down HBA link.
+ **/
+void
+lpfc_down_link(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb)
+{
+        MAILBOX_t *mb;
+        memset(pmb, 0, sizeof(LPFC_MBOXQ_t));
+        mb = &pmb->u.mb;
+        mb->mbxCommand = MBX_DOWN_LINK;
+        mb->mbxOwner = OWN_HOST;
 }
 
 /**
- * lpfc_dump_mem - Prepare a mailbox command for retrieving HBA's VPD memory
+ * lpfc_dump_mem - Prepare a mailbox command for reading a region.
  * @phba: pointer to lpfc hba data structure.
  * @pmb: pointer to the driver internal queue element for mailbox command.
- * @offset: offset for dumping VPD memory mailbox command.
+ * @offset: offset into the region.
+ * @region_id: config region id.
  *
  * The dump mailbox command provides a method for the device driver to obtain
  * various types of information from the HBA device.
  *
- * This routine prepares the mailbox command for dumping HBA Vital Product
- * Data (VPD) memory. This mailbox command is to be used for retrieving a
- * portion (DMP_RSP_SIZE bytes) of a HBA's VPD from the HBA at an address
- * offset specified by the offset parameter.
+ * This routine prepares the mailbox command for dumping HBA's config region.
  **/
 void
-lpfc_dump_mem(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb, uint16_t offset)
+lpfc_dump_mem(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmb, uint16_t offset,
+                uint16_t region_id)
 {
         MAILBOX_t *mb;
         void *ctx;
@@ -107,7 +144,7 @@ lpfc_dump_mem(struct lpfc_hba * phba, LPFC_MBOXQ_t * pmb, uint16_t offset)
         mb->un.varDmp.cv = 1;
         mb->un.varDmp.type = DMP_NV_PARAMS;
         mb->un.varDmp.entry_index = offset;
-        mb->un.varDmp.region_id = DMP_REGION_VPD;
+        mb->un.varDmp.region_id = region_id;
         mb->un.varDmp.word_cnt = (DMP_RSP_SIZE / sizeof (uint32_t));
         mb->un.varDmp.co = 0;
         mb->un.varDmp.resp_offset = 0;
@@ -1789,6 +1826,7 @@ lpfc_reg_vfi(struct lpfcMboxq *mbox, struct lpfc_vport *vport, dma_addr_t phys)
 
 /**
  * lpfc_init_vpi - Initialize the INIT_VPI mailbox command
+ * @phba: pointer to the hba structure to init the VPI for.
  * @mbox: pointer to lpfc mbox command to initialize.
  * @vpi: VPI to be initialized.
  *
@@ -1799,11 +1837,14 @@ lpfc_reg_vfi(struct lpfcMboxq *mbox, struct lpfc_vport *vport, dma_addr_t phys)
  * successful virtual NPort login.
  **/
 void
-lpfc_init_vpi(struct lpfcMboxq *mbox, uint16_t vpi)
+lpfc_init_vpi(struct lpfc_hba *phba, struct lpfcMboxq *mbox, uint16_t vpi)
 {
         memset(mbox, 0, sizeof(*mbox));
         bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_INIT_VPI);
-        bf_set(lpfc_init_vpi_vpi, &mbox->u.mqe.un.init_vpi, vpi);
+        bf_set(lpfc_init_vpi_vpi, &mbox->u.mqe.un.init_vpi,
+               vpi + phba->vpi_base);
+        bf_set(lpfc_init_vpi_vfi, &mbox->u.mqe.un.init_vpi,
+               phba->pport->vfi + phba->vfi_base);
 }
 
 /**
@@ -1852,7 +1893,7 @@ lpfc_dump_fcoe_param(struct lpfc_hba *phba,
                 /* dump_fcoe_param failed to allocate memory */
                 lpfc_printf_log(phba, KERN_WARNING, LOG_MBOX,
                         "2569 lpfc_dump_fcoe_param: memory"
-                        " allocation failed \n");
+                        " allocation failed\n");
                 return 1;
         }
 
@@ -1864,8 +1905,8 @@ lpfc_dump_fcoe_param(struct lpfc_hba *phba,
 
         mb->mbxCommand = MBX_DUMP_MEMORY;
         mb->un.varDmp.type = DMP_NV_PARAMS;
-        mb->un.varDmp.region_id = DMP_REGION_FCOEPARAM;
-        mb->un.varDmp.sli4_length = DMP_FCOEPARAM_RGN_SIZE;
+        mb->un.varDmp.region_id = DMP_REGION_23;
+        mb->un.varDmp.sli4_length = DMP_RGN23_SIZE;
         mb->un.varWords[3] = putPaddrLow(mp->phys);
         mb->un.varWords[4] = putPaddrHigh(mp->phys);
         return 0;
@@ -1938,9 +1979,7 @@ lpfc_resume_rpi(struct lpfcMboxq *mbox, struct lpfc_nodelist *ndlp)
         memset(mbox, 0, sizeof(*mbox));
         resume_rpi = &mbox->u.mqe.un.resume_rpi;
         bf_set(lpfc_mqe_command, &mbox->u.mqe, MBX_RESUME_RPI);
-        bf_set(lpfc_resume_rpi_rpi, resume_rpi, ndlp->nlp_rpi);
-        bf_set(lpfc_resume_rpi_vpi, resume_rpi,
-               ndlp->vport->vpi + ndlp->vport->phba->vpi_base);
-        bf_set(lpfc_resume_rpi_vfi, resume_rpi,
-               ndlp->vport->vfi + ndlp->vport->phba->vfi_base);
+        bf_set(lpfc_resume_rpi_index, resume_rpi, ndlp->nlp_rpi);
+        bf_set(lpfc_resume_rpi_ii, resume_rpi, RESUME_INDEX_RPI);
+        resume_rpi->event_tag = ndlp->phba->fc_eventTag;
 }
diff --git a/drivers/scsi/lpfc/lpfc_mem.c b/drivers/scsi/lpfc/lpfc_mem.c
index e198c917c13e..a1b6db6016da 100644
--- a/drivers/scsi/lpfc/lpfc_mem.c
+++ b/drivers/scsi/lpfc/lpfc_mem.c
@@ -110,17 +110,28 @@ lpfc_mem_alloc(struct lpfc_hba *phba, int align)
                                                 sizeof(struct lpfc_nodelist));
         if (!phba->nlp_mem_pool)
                 goto fail_free_mbox_pool;
-        phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
+
+        if (phba->sli_rev == LPFC_SLI_REV4) {
+                phba->lpfc_hrb_pool = pci_pool_create("lpfc_hrb_pool",
                                               phba->pcidev,
                                               LPFC_HDR_BUF_SIZE, align, 0);
-        if (!phba->lpfc_hrb_pool)
-                goto fail_free_nlp_mem_pool;
-        phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
+                if (!phba->lpfc_hrb_pool)
+                        goto fail_free_nlp_mem_pool;
+
+                phba->lpfc_drb_pool = pci_pool_create("lpfc_drb_pool",
                                               phba->pcidev,
                                               LPFC_DATA_BUF_SIZE, align, 0);
-        if (!phba->lpfc_drb_pool)
-                goto fail_free_hbq_pool;
-
+                if (!phba->lpfc_drb_pool)
+                        goto fail_free_hrb_pool;
+                phba->lpfc_hbq_pool = NULL;
+        } else {
+                phba->lpfc_hbq_pool = pci_pool_create("lpfc_hbq_pool",
+                        phba->pcidev, LPFC_BPL_SIZE, align, 0);
+                if (!phba->lpfc_hbq_pool)
+                        goto fail_free_nlp_mem_pool;
+                phba->lpfc_hrb_pool = NULL;
+                phba->lpfc_drb_pool = NULL;
+        }
         /* vpi zero is reserved for the physical port so add 1 to max */
         longs = ((phba->max_vpi + 1) + BITS_PER_LONG - 1) / BITS_PER_LONG;
         phba->vpi_bmask = kzalloc(longs * sizeof(unsigned long), GFP_KERNEL);
@@ -132,7 +143,7 @@ lpfc_mem_alloc(struct lpfc_hba *phba, int align)
  fail_free_dbq_pool:
         pci_pool_destroy(phba->lpfc_drb_pool);
         phba->lpfc_drb_pool = NULL;
- fail_free_hbq_pool:
+ fail_free_hrb_pool:
         pci_pool_destroy(phba->lpfc_hrb_pool);
         phba->lpfc_hrb_pool = NULL;
  fail_free_nlp_mem_pool:
@@ -176,11 +187,17 @@ lpfc_mem_free(struct lpfc_hba *phba)
 
         /* Free HBQ pools */
         lpfc_sli_hbqbuf_free_all(phba);
-        pci_pool_destroy(phba->lpfc_drb_pool);
+        if (phba->lpfc_drb_pool)
+                pci_pool_destroy(phba->lpfc_drb_pool);
         phba->lpfc_drb_pool = NULL;
-        pci_pool_destroy(phba->lpfc_hrb_pool);
+        if (phba->lpfc_hrb_pool)
+                pci_pool_destroy(phba->lpfc_hrb_pool);
         phba->lpfc_hrb_pool = NULL;
 
+        if (phba->lpfc_hbq_pool)
+                pci_pool_destroy(phba->lpfc_hbq_pool);
+        phba->lpfc_hbq_pool = NULL;
+
         /* Free NLP memory pool */
         mempool_destroy(phba->nlp_mem_pool);
         phba->nlp_mem_pool = NULL;
@@ -380,7 +397,7 @@ lpfc_els_hbq_alloc(struct lpfc_hba *phba)
         if (!hbqbp)
                 return NULL;
 
-        hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hrb_pool, GFP_KERNEL,
+        hbqbp->dbuf.virt = pci_pool_alloc(phba->lpfc_hbq_pool, GFP_KERNEL,
                                           &hbqbp->dbuf.phys);
         if (!hbqbp->dbuf.virt) {
                 kfree(hbqbp);
@@ -405,7 +422,7 @@ lpfc_els_hbq_alloc(struct lpfc_hba *phba)
 void
 lpfc_els_hbq_free(struct lpfc_hba *phba, struct hbq_dmabuf *hbqbp)
 {
-        pci_pool_free(phba->lpfc_hrb_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
+        pci_pool_free(phba->lpfc_hbq_pool, hbqbp->dbuf.virt, hbqbp->dbuf.phys);
         kfree(hbqbp);
         return;
 }
diff --git a/drivers/scsi/lpfc/lpfc_nl.h b/drivers/scsi/lpfc/lpfc_nl.h
index 27d1a88a98fe..d655ed3eebef 100644
--- a/drivers/scsi/lpfc/lpfc_nl.h
+++ b/drivers/scsi/lpfc/lpfc_nl.h
@@ -177,3 +177,23 @@ struct temp_event {
         uint32_t data;
 };
 
+/* bsg definitions */
+#define LPFC_BSG_VENDOR_SET_CT_EVENT    1
+#define LPFC_BSG_VENDOR_GET_CT_EVENT    2
+
+struct set_ct_event {
+        uint32_t command;
+        uint32_t ev_req_id;
+        uint32_t ev_reg_id;
+};
+
+struct get_ct_event {
+        uint32_t command;
+        uint32_t ev_reg_id;
+        uint32_t ev_req_id;
+};
+
+struct get_ct_event_reply {
+        uint32_t immed_data;
+        uint32_t type;
+};
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index da59c4f0168f..61d089703806 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -2142,7 +2142,7 @@ lpfc_handle_fcp_err(struct lpfc_vport *vport, struct lpfc_scsi_buf *lpfc_cmd,
         } else if (resp_info & RESID_OVER) {
                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_FCP,
                                  "9028 FCP command x%x residual overrun error. "
-                                 "Data: x%x x%x \n", cmnd->cmnd[0],
+                                 "Data: x%x x%x\n", cmnd->cmnd[0],
                                  scsi_bufflen(cmnd), scsi_get_resid(cmnd));
                 host_status = DID_ERROR;
 
@@ -2843,7 +2843,7 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
                                 dif_op_str[scsi_get_prot_op(cmnd)]);
                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
                                 "9034 BLKGRD: CDB: %02x %02x %02x %02x %02x "
-                                "%02x %02x %02x %02x %02x \n",
+                                "%02x %02x %02x %02x %02x\n",
                                 cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
                                 cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
                                 cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
@@ -2871,7 +2871,7 @@ lpfc_queuecommand(struct scsi_cmnd *cmnd, void (*done) (struct scsi_cmnd *))
                                 dif_op_str[scsi_get_prot_op(cmnd)]);
                 lpfc_printf_vlog(vport, KERN_WARNING, LOG_BG,
                                  "9039 BLKGRD: CDB: %02x %02x %02x %02x %02x "
-                                 "%02x %02x %02x %02x %02x \n",
+                                 "%02x %02x %02x %02x %02x\n",
                                  cmnd->cmnd[0], cmnd->cmnd[1], cmnd->cmnd[2],
                                  cmnd->cmnd[3], cmnd->cmnd[4], cmnd->cmnd[5],
                                  cmnd->cmnd[6], cmnd->cmnd[7], cmnd->cmnd[8],
@@ -3584,6 +3584,7 @@ struct scsi_host_template lpfc_template = {
         .use_clustering         = ENABLE_CLUSTERING,
         .shost_attrs            = lpfc_hba_attrs,
         .max_sectors            = 0xFFFF,
+        .vendor_id              = LPFC_NL_VENDOR_ID,
 };
 
 struct scsi_host_template lpfc_vport_template = {
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index acc43b061ba1..43cbe336f1f8 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -4139,7 +4139,7 @@ lpfc_sli4_read_fcoe_params(struct lpfc_hba *phba,
                 return -EIO;
         }
         data_length = mqe->un.mb_words[5];
-        if (data_length > DMP_FCOEPARAM_RGN_SIZE) {
+        if (data_length > DMP_RGN23_SIZE) {
                 lpfc_mbuf_free(phba, mp->virt, mp->phys);
                 kfree(mp);
                 return -EIO;
@@ -4304,7 +4304,7 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
          */
         if (lpfc_sli4_read_fcoe_params(phba, mboxq))
                 lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_INIT,
-                        "2570 Failed to read FCoE parameters \n");
+                        "2570 Failed to read FCoE parameters\n");
 
         /* Issue READ_REV to collect vpd and FW information. */
         vpd_size = PAGE_SIZE;
@@ -4522,12 +4522,8 @@ lpfc_sli4_hba_setup(struct lpfc_hba *phba)
         lpfc_sli4_rb_setup(phba);
 
         /* Start the ELS watchdog timer */
-        /*
-         * The driver for SLI4 is not yet ready to process timeouts
-         * or interrupts.  Once it is, the comment bars can be removed.
-         */
-        /* mod_timer(&vport->els_tmofunc,
-         *           jiffies + HZ * (phba->fc_ratov*2)); */
+        mod_timer(&vport->els_tmofunc,
+                  jiffies + HZ * (phba->fc_ratov * 2));
 
         /* Start heart beat timer */
         mod_timer(&phba->hb_tmofunc,
@@ -4706,13 +4702,13 @@ lpfc_sli_issue_mbox_s3(struct lpfc_hba *phba, LPFC_MBOXQ_t *pmbox,
 
         spin_lock_irqsave(&phba->hbalock, drvr_flag);
         if (!pmbox) {
+                phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                 /* processing mbox queue from intr_handler */
                 if (unlikely(psli->sli_flag & LPFC_SLI_ASYNC_MBX_BLK)) {
                         spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
                         return MBX_SUCCESS;
                 }
                 processing_queue = 1;
-                phba->sli.sli_flag &= ~LPFC_SLI_MBOX_ACTIVE;
                 pmbox = lpfc_mbox_get(phba);
                 if (!pmbox) {
                         spin_unlock_irqrestore(&phba->hbalock, drvr_flag);
@@ -5279,6 +5275,18 @@ lpfc_sli_issue_mbox_s4(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
         unsigned long iflags;
         int rc;
 
+        rc = lpfc_mbox_dev_check(phba);
+        if (unlikely(rc)) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
+                                "(%d):2544 Mailbox command x%x (x%x) "
+                                "cannot issue Data: x%x x%x\n",
+                                mboxq->vport ? mboxq->vport->vpi : 0,
+                                mboxq->u.mb.mbxCommand,
+                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
+                                psli->sli_flag, flag);
+                goto out_not_finished;
+        }
+
         /* Detect polling mode and jump to a handler */
         if (!phba->sli4_hba.intr_enable) {
                 if (flag == MBX_POLL)
@@ -5338,17 +5346,6 @@ lpfc_sli_issue_mbox_s4(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq,
                                 psli->sli_flag, flag);
                 goto out_not_finished;
         }
-        rc = lpfc_mbox_dev_check(phba);
-        if (unlikely(rc)) {
-                lpfc_printf_log(phba, KERN_ERR, LOG_MBOX | LOG_SLI,
-                                "(%d):2544 Mailbox command x%x (x%x) "
-                                "cannot issue Data: x%x x%x\n",
-                                mboxq->vport ? mboxq->vport->vpi : 0,
-                                mboxq->u.mb.mbxCommand,
-                                lpfc_sli4_mbox_opcode_get(phba, mboxq),
-                                psli->sli_flag, flag);
-                goto out_not_finished;
-        }
 
         /* Put the mailbox command to the driver internal FIFO */
         psli->slistat.mbox_busy++;
@@ -5817,19 +5814,21 @@ lpfc_sli4_bpl2sgl(struct lpfc_hba *phba, struct lpfc_iocbq *piocbq,
 /**
  * lpfc_sli4_scmd_to_wqidx_distr - scsi command to SLI4 WQ index distribution
  * @phba: Pointer to HBA context object.
- * @piocb: Pointer to command iocb.
  *
  * This routine performs a round robin SCSI command to SLI4 FCP WQ index
- * distribution.
+ * distribution.  This is called by __lpfc_sli_issue_iocb_s4() with the hbalock
+ * held.
  *
  * Return: index into SLI4 fast-path FCP queue index.
  **/
 static uint32_t
-lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba, struct lpfc_iocbq *piocb)
+lpfc_sli4_scmd_to_wqidx_distr(struct lpfc_hba *phba)
 {
-        static uint32_t fcp_qidx;
+        ++phba->fcp_qidx;
+        if (phba->fcp_qidx >= phba->cfg_fcp_wq_count)
+                phba->fcp_qidx = 0;
 
-        return fcp_qidx++ % phba->cfg_fcp_wq_count;
+        return phba->fcp_qidx;
 }
 
 /**
@@ -6156,7 +6155,7 @@ __lpfc_sli_issue_iocb_s4(struct lpfc_hba *phba, uint32_t ring_number,
                 return IOCB_ERROR;
 
         if (piocb->iocb_flag &  LPFC_IO_FCP) {
-                fcp_wqidx = lpfc_sli4_scmd_to_wqidx_distr(phba, piocb);
+                fcp_wqidx = lpfc_sli4_scmd_to_wqidx_distr(phba);
                 if (lpfc_sli4_wq_put(phba->sli4_hba.fcp_wq[fcp_wqidx], &wqe))
                         return IOCB_ERROR;
         } else {
@@ -6327,7 +6326,7 @@ lpfc_sli_async_event_handler(struct lpfc_hba * phba,
                         KERN_ERR,
                         LOG_SLI,
                         "0346 Ring %d handler: unexpected ASYNC_STATUS"
-                        " evt_code 0x%x \n"
+                        " evt_code 0x%x\n"
                         "W0  0x%08x W1  0x%08x W2  0x%08x W3  0x%08x\n"
                         "W4  0x%08x W5  0x%08x W6  0x%08x W7  0x%08x\n"
                         "W8  0x%08x W9  0x%08x W10 0x%08x W11 0x%08x\n"
@@ -6790,6 +6789,33 @@ lpfc_sli_pcimem_bcopy(void *srcp, void *destp, uint32_t cnt)
 
 
 /**
+ * lpfc_sli_bemem_bcopy - SLI memory copy function
+ * @srcp: Source memory pointer.
+ * @destp: Destination memory pointer.
+ * @cnt: Number of words required to be copied.
+ *
+ * This function is used for copying data between a data structure
+ * with big endian representation to local endianness.
+ * This function can be called with or without lock.
+ **/
+void
+lpfc_sli_bemem_bcopy(void *srcp, void *destp, uint32_t cnt)
+{
+        uint32_t *src = srcp;
+        uint32_t *dest = destp;
+        uint32_t ldata;
+        int i;
+
+        for (i = 0; i < (int)cnt; i += sizeof(uint32_t)) {
+                ldata = *src;
+                ldata = be32_to_cpu(ldata);
+                *dest = ldata;
+                src++;
+                dest++;
+        }
+}
+
+/**
  * lpfc_sli_ringpostbuf_put - Function to add a buffer to postbufq
  * @phba: Pointer to HBA context object.
  * @pring: Pointer to driver SLI ring object.
@@ -7678,12 +7704,6 @@ lpfc_sli4_eratt_read(struct lpfc_hba *phba)
                                         "online0_reg=0x%x, online1_reg=0x%x\n",
                                         uerr_sta_lo, uerr_sta_hi,
                                         onlnreg0, onlnreg1);
-                        /* TEMP: as the driver error recover logic is not
-                         * fully developed, we just log the error message
-                         * and the device error attention action is now
-                         * temporarily disabled.
-                         */
-                        return 0;
                         phba->work_status[0] = uerr_sta_lo;
                         phba->work_status[1] = uerr_sta_hi;
                         /* Set the driver HA work bitmap */
@@ -9499,8 +9519,7 @@ lpfc_eq_create(struct lpfc_hba *phba, struct lpfc_queue *eq, uint16_t imax)
         eq->host_index = 0;
         eq->hba_index = 0;
 
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, phba->mbox_mem_pool);
+        mempool_free(mbox, phba->mbox_mem_pool);
         return status;
 }
 
@@ -9604,10 +9623,9 @@ lpfc_cq_create(struct lpfc_hba *phba, struct lpfc_queue *cq,
         cq->queue_id = bf_get(lpfc_mbx_cq_create_q_id, &cq_create->u.response);
         cq->host_index = 0;
         cq->hba_index = 0;
-out:
 
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, phba->mbox_mem_pool);
+out:
+        mempool_free(mbox, phba->mbox_mem_pool);
         return status;
 }
 
@@ -9712,8 +9730,7 @@ lpfc_mq_create(struct lpfc_hba *phba, struct lpfc_queue *mq,
         /* link the mq onto the parent cq child list */
         list_add_tail(&mq->list, &cq->child_list);
 out:
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, phba->mbox_mem_pool);
+        mempool_free(mbox, phba->mbox_mem_pool);
         return status;
 }
 
@@ -9795,8 +9812,7 @@ lpfc_wq_create(struct lpfc_hba *phba, struct lpfc_queue *wq,
         /* link the wq onto the parent cq child list */
         list_add_tail(&wq->list, &cq->child_list);
 out:
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, phba->mbox_mem_pool);
+        mempool_free(mbox, phba->mbox_mem_pool);
         return status;
 }
 
@@ -9970,8 +9986,7 @@ lpfc_rq_create(struct lpfc_hba *phba, struct lpfc_queue *hrq,
         list_add_tail(&drq->list, &cq->child_list);
 
 out:
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, phba->mbox_mem_pool);
+        mempool_free(mbox, phba->mbox_mem_pool);
         return status;
 }
 
@@ -10026,8 +10041,7 @@ lpfc_eq_destroy(struct lpfc_hba *phba, struct lpfc_queue *eq)
 
         /* Remove eq from any list */
         list_del_init(&eq->list);
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, eq->phba->mbox_mem_pool);
+        mempool_free(mbox, eq->phba->mbox_mem_pool);
         return status;
 }
 
@@ -10080,8 +10094,7 @@ lpfc_cq_destroy(struct lpfc_hba *phba, struct lpfc_queue *cq)
         }
         /* Remove cq from any list */
         list_del_init(&cq->list);
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, cq->phba->mbox_mem_pool);
+        mempool_free(mbox, cq->phba->mbox_mem_pool);
         return status;
 }
 
@@ -10134,8 +10147,7 @@ lpfc_mq_destroy(struct lpfc_hba *phba, struct lpfc_queue *mq)
         }
         /* Remove mq from any list */
         list_del_init(&mq->list);
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, mq->phba->mbox_mem_pool);
+        mempool_free(mbox, mq->phba->mbox_mem_pool);
         return status;
 }
 
@@ -10187,8 +10199,7 @@ lpfc_wq_destroy(struct lpfc_hba *phba, struct lpfc_queue *wq)
         }
         /* Remove wq from any list */
         list_del_init(&wq->list);
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, wq->phba->mbox_mem_pool);
+        mempool_free(mbox, wq->phba->mbox_mem_pool);
         return status;
 }
 
@@ -10258,8 +10269,7 @@ lpfc_rq_destroy(struct lpfc_hba *phba, struct lpfc_queue *hrq,
         }
         list_del_init(&hrq->list);
         list_del_init(&drq->list);
-        if (rc != MBX_TIMEOUT)
-                mempool_free(mbox, hrq->phba->mbox_mem_pool);
+        mempool_free(mbox, hrq->phba->mbox_mem_pool);
         return status;
 }
 
@@ -10933,6 +10943,7 @@ lpfc_prep_seq(struct lpfc_vport *vport, struct hbq_dmabuf *seq_dmabuf)
         first_iocbq = lpfc_sli_get_iocbq(vport->phba);
         if (first_iocbq) {
                 /* Initialize the first IOCB. */
+                first_iocbq->iocb.unsli3.rcvsli3.acc_len = 0;
                 first_iocbq->iocb.ulpStatus = IOSTAT_SUCCESS;
                 first_iocbq->iocb.ulpCommand = CMD_IOCB_RCV_SEQ64_CX;
                 first_iocbq->iocb.ulpContext = be16_to_cpu(fc_hdr->fh_ox_id);
@@ -10945,6 +10956,8 @@ lpfc_prep_seq(struct lpfc_vport *vport, struct hbq_dmabuf *seq_dmabuf)
                 first_iocbq->iocb.un.cont64[0].tus.f.bdeSize =
                                                         LPFC_DATA_BUF_SIZE;
                 first_iocbq->iocb.un.rcvels.remoteID = sid;
+                first_iocbq->iocb.unsli3.rcvsli3.acc_len +=
+                                bf_get(lpfc_rcqe_length, &seq_dmabuf->rcqe);
         }
         iocbq = first_iocbq;
         /*
@@ -10961,6 +10974,8 @@ lpfc_prep_seq(struct lpfc_vport *vport, struct hbq_dmabuf *seq_dmabuf)
                         iocbq->iocb.ulpBdeCount++;
                         iocbq->iocb.unsli3.rcvsli3.bde2.tus.f.bdeSize =
                                                         LPFC_DATA_BUF_SIZE;
+                        first_iocbq->iocb.unsli3.rcvsli3.acc_len +=
+                                bf_get(lpfc_rcqe_length, &seq_dmabuf->rcqe);
                 } else {
                         iocbq = lpfc_sli_get_iocbq(vport->phba);
                         if (!iocbq) {
@@ -10978,6 +10993,8 @@ lpfc_prep_seq(struct lpfc_vport *vport, struct hbq_dmabuf *seq_dmabuf)
                         iocbq->iocb.ulpBdeCount = 1;
                         iocbq->iocb.un.cont64[0].tus.f.bdeSize =
                                                         LPFC_DATA_BUF_SIZE;
+                        first_iocbq->iocb.unsli3.rcvsli3.acc_len +=
+                                bf_get(lpfc_rcqe_length, &seq_dmabuf->rcqe);
                         iocbq->iocb.un.rcvels.remoteID = sid;
                         list_add_tail(&iocbq->list, &first_iocbq->list);
                 }
@@ -11324,7 +11341,7 @@ lpfc_sli4_init_vpi(struct lpfc_hba *phba, uint16_t vpi)
         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
         if (!mboxq)
                 return -ENOMEM;
-        lpfc_init_vpi(mboxq, vpi);
+        lpfc_init_vpi(phba, mboxq, vpi);
         mbox_tmo = lpfc_mbox_tmo_val(phba, MBX_INIT_VPI);
         rc = lpfc_sli_issue_mbox_wait(phba, mboxq, mbox_tmo);
         if (rc != MBX_TIMEOUT)
@@ -11519,6 +11536,7 @@ lpfc_sli4_read_fcf_record(struct lpfc_hba *phba, uint16_t fcf_index)
         uint32_t alloc_len, req_len;
         struct lpfc_mbx_read_fcf_tbl *read_fcf;
 
+        phba->fcoe_eventtag_at_fcf_scan = phba->fcoe_eventtag;
         mboxq = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
         if (!mboxq) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
@@ -11570,7 +11588,140 @@ lpfc_sli4_read_fcf_record(struct lpfc_hba *phba, uint16_t fcf_index)
         if (rc == MBX_NOT_FINISHED) {
                 lpfc_sli4_mbox_cmd_free(phba, mboxq);
                 error = -EIO;
-        } else
+        } else {
+                spin_lock_irq(&phba->hbalock);
+                phba->hba_flag |= FCF_DISC_INPROGRESS;
+                spin_unlock_irq(&phba->hbalock);
                 error = 0;
+        }
         return error;
 }
+
+/**
+ * lpfc_sli_read_link_ste - Read region 23 to decide if link is disabled.
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This function read region 23 and parse TLV for port status to
+ * decide if the user disaled the port. If the TLV indicates the
+ * port is disabled, the hba_flag is set accordingly.
+ **/
+void
+lpfc_sli_read_link_ste(struct lpfc_hba *phba)
+{
+        LPFC_MBOXQ_t *pmb = NULL;
+        MAILBOX_t *mb;
+        uint8_t *rgn23_data = NULL;
+        uint32_t offset = 0, data_size, sub_tlv_len, tlv_offset;
+        int rc;
+
+        pmb = mempool_alloc(phba->mbox_mem_pool, GFP_KERNEL);
+        if (!pmb) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                        "2600 lpfc_sli_read_serdes_param failed to"
+                        " allocate mailbox memory\n");
+                goto out;
+        }
+        mb = &pmb->u.mb;
+
+        /* Get adapter Region 23 data */
+        rgn23_data = kzalloc(DMP_RGN23_SIZE, GFP_KERNEL);
+        if (!rgn23_data)
+                goto out;
+
+        do {
+                lpfc_dump_mem(phba, pmb, offset, DMP_REGION_23);
+                rc = lpfc_sli_issue_mbox(phba, pmb, MBX_POLL);
+
+                if (rc != MBX_SUCCESS) {
+                        lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
+                                "2601 lpfc_sli_read_link_ste failed to"
+                                " read config region 23 rc 0x%x Status 0x%x\n",
+                                rc, mb->mbxStatus);
+                        mb->un.varDmp.word_cnt = 0;
+                }
+                /*
+                 * dump mem may return a zero when finished or we got a
+                 * mailbox error, either way we are done.
+                 */
+                if (mb->un.varDmp.word_cnt == 0)
+                        break;
+                if (mb->un.varDmp.word_cnt > DMP_RGN23_SIZE - offset)
+                        mb->un.varDmp.word_cnt = DMP_RGN23_SIZE - offset;
+
+                lpfc_sli_pcimem_bcopy(((uint8_t *)mb) + DMP_RSP_OFFSET,
+                        rgn23_data + offset,
+                        mb->un.varDmp.word_cnt);
+                offset += mb->un.varDmp.word_cnt;
+        } while (mb->un.varDmp.word_cnt && offset < DMP_RGN23_SIZE);
+
+        data_size = offset;
+        offset = 0;
+
+        if (!data_size)
+                goto out;
+
+        /* Check the region signature first */
+        if (memcmp(&rgn23_data[offset], LPFC_REGION23_SIGNATURE, 4)) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                        "2619 Config region 23 has bad signature\n");
+                        goto out;
+        }
+        offset += 4;
+
+        /* Check the data structure version */
+        if (rgn23_data[offset] != LPFC_REGION23_VERSION) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                        "2620 Config region 23 has bad version\n");
+                goto out;
+        }
+        offset += 4;
+
+        /* Parse TLV entries in the region */
+        while (offset < data_size) {
+                if (rgn23_data[offset] == LPFC_REGION23_LAST_REC)
+                        break;
+                /*
+                 * If the TLV is not driver specific TLV or driver id is
+                 * not linux driver id, skip the record.
+                 */
+                if ((rgn23_data[offset] != DRIVER_SPECIFIC_TYPE) ||
+                    (rgn23_data[offset + 2] != LINUX_DRIVER_ID) ||
+                    (rgn23_data[offset + 3] != 0)) {
+                        offset += rgn23_data[offset + 1] * 4 + 4;
+                        continue;
+                }
+
+                /* Driver found a driver specific TLV in the config region */
+                sub_tlv_len = rgn23_data[offset + 1] * 4;
+                offset += 4;
+                tlv_offset = 0;
+
+                /*
+                 * Search for configured port state sub-TLV.
+                 */
+                while ((offset < data_size) &&
+                        (tlv_offset < sub_tlv_len)) {
+                        if (rgn23_data[offset] == LPFC_REGION23_LAST_REC) {
+                                offset += 4;
+                                tlv_offset += 4;
+                                break;
+                        }
+                        if (rgn23_data[offset] != PORT_STE_TYPE) {
+                                offset += rgn23_data[offset + 1] * 4 + 4;
+                                tlv_offset += rgn23_data[offset + 1] * 4 + 4;
+                                continue;
+                        }
+
+                        /* This HBA contains PORT_STE configured */
+                        if (!rgn23_data[offset + 2])
+                                phba->hba_flag |= LINK_DISABLED;
+
+                        goto out;
+                }
+        }
+out:
+        if (pmb)
+                mempool_free(pmb, phba->mbox_mem_pool);
+        kfree(rgn23_data);
+        return;
+}
diff --git a/drivers/scsi/lpfc/lpfc_sli4.h b/drivers/scsi/lpfc/lpfc_sli4.h
index 3b276b47d18f..b5f4ba1a5c27 100644
--- a/drivers/scsi/lpfc/lpfc_sli4.h
+++ b/drivers/scsi/lpfc/lpfc_sli4.h
@@ -132,6 +132,7 @@ struct lpfc_sli4_link {
 
 struct lpfc_fcf {
         uint8_t  fabric_name[8];
+        uint8_t  switch_name[8];
         uint8_t  mac_addr[6];
         uint16_t fcf_indx;
         uint16_t fcfi;
@@ -150,6 +151,10 @@ struct lpfc_fcf {
 #define LPFC_REGION23_SIGNATURE "RG23"
 #define LPFC_REGION23_VERSION   1
 #define LPFC_REGION23_LAST_REC  0xff
+#define DRIVER_SPECIFIC_TYPE    0xA2
+#define LINUX_DRIVER_ID         0x20
+#define PORT_STE_TYPE           0x1
+
 struct lpfc_fip_param_hdr {
         uint8_t type;
 #define FCOE_PARAM_TYPE         0xA0
diff --git a/drivers/scsi/lpfc/lpfc_version.h b/drivers/scsi/lpfc/lpfc_version.h
index 41094e02304b..9ae20af4bdb7 100644
--- a/drivers/scsi/lpfc/lpfc_version.h
+++ b/drivers/scsi/lpfc/lpfc_version.h
@@ -18,7 +18,7 @@
  * included with this package.                                     *
  *******************************************************************/
 
-#define LPFC_DRIVER_VERSION "8.3.3"
+#define LPFC_DRIVER_VERSION "8.3.4"
 
 #define LPFC_DRIVER_NAME                "lpfc"
 #define LPFC_SP_DRIVER_HANDLER_NAME     "lpfc:sp"
diff --git a/drivers/scsi/lpfc/lpfc_vport.c b/drivers/scsi/lpfc/lpfc_vport.c
index e0b49922193e..606efa767548 100644
--- a/drivers/scsi/lpfc/lpfc_vport.c
+++ b/drivers/scsi/lpfc/lpfc_vport.c
@@ -313,22 +313,6 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
                 goto error_out;
         }
 
-        /*
-         * In SLI4, the vpi must be activated before it can be used
-         * by the port.
-         */
-        if (phba->sli_rev == LPFC_SLI_REV4) {
-                rc = lpfc_sli4_init_vpi(phba, vpi);
-                if (rc) {
-                        lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
-                                        "1838 Failed to INIT_VPI on vpi %d "
-                                        "status %d\n", vpi, rc);
-                        rc = VPORT_NORESOURCES;
-                        lpfc_free_vpi(phba, vpi);
-                        goto error_out;
-                }
-        }
-
         /* Assign an unused board number */
         if ((instance = lpfc_get_instance()) < 0) {
                 lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
@@ -367,12 +351,8 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
                 goto error_out;
         }
 
-        memcpy(vport->fc_portname.u.wwn, vport->fc_sparam.portName.u.wwn, 8);
-        memcpy(vport->fc_nodename.u.wwn, vport->fc_sparam.nodeName.u.wwn, 8);
-        if (fc_vport->node_name != 0)
-                u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
-        if (fc_vport->port_name != 0)
-                u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
+        u64_to_wwn(fc_vport->node_name, vport->fc_nodename.u.wwn);
+        u64_to_wwn(fc_vport->port_name, vport->fc_portname.u.wwn);
 
         memcpy(&vport->fc_sparam.portName, vport->fc_portname.u.wwn, 8);
         memcpy(&vport->fc_sparam.nodeName, vport->fc_nodename.u.wwn, 8);
@@ -404,7 +384,34 @@ lpfc_vport_create(struct fc_vport *fc_vport, bool disable)
         *(struct lpfc_vport **)fc_vport->dd_data = vport;
         vport->fc_vport = fc_vport;
 
+        /*
+         * In SLI4, the vpi must be activated before it can be used
+         * by the port.
+         */
+        if ((phba->sli_rev == LPFC_SLI_REV4) &&
+                (pport->vfi_state & LPFC_VFI_REGISTERED)) {
+                rc = lpfc_sli4_init_vpi(phba, vpi);
+                if (rc) {
+                        lpfc_printf_log(phba, KERN_ERR, LOG_VPORT,
+                                        "1838 Failed to INIT_VPI on vpi %d "
+                                        "status %d\n", vpi, rc);
+                        rc = VPORT_NORESOURCES;
+                        lpfc_free_vpi(phba, vpi);
+                        goto error_out;
+                }
+        } else if (phba->sli_rev == LPFC_SLI_REV4) {
+                /*
+                 * Driver cannot INIT_VPI now. Set the flags to
+                 * init_vpi when reg_vfi complete.
+                 */
+                vport->fc_flag |= FC_VPORT_NEEDS_INIT_VPI;
+                lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
+                rc = VPORT_OK;
+                goto out;
+        }
+
         if ((phba->link_state < LPFC_LINK_UP) ||
+            (pport->port_state < LPFC_FABRIC_CFG_LINK) ||
             (phba->fc_topology == TOPOLOGY_LOOP)) {
                 lpfc_vport_set_state(vport, FC_VPORT_LINKDOWN);
                 rc = VPORT_OK;
@@ -661,7 +668,7 @@ lpfc_vport_delete(struct fc_vport *fc_vport)
                                 lpfc_printf_log(vport->phba, KERN_WARNING,
                                                 LOG_VPORT,
                                                 "1829 CT command failed to "
-                                                "delete objects on fabric. \n");
+                                                "delete objects on fabric\n");
                 }
                 /* First look for the Fabric ndlp */
                 ndlp = lpfc_findnode_did(vport, Fabric_DID);
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 35a13867495e..d95d2f274cb3 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -94,7 +94,7 @@ _base_fault_reset_work(struct work_struct *work)
         int rc;
 
         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (ioc->ioc_reset_in_progress)
+        if (ioc->shost_recovery)
                 goto rearm_timer;
         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
@@ -687,6 +687,14 @@ _base_unmask_interrupts(struct MPT2SAS_ADAPTER *ioc)
         ioc->mask_interrupts = 0;
 }
 
+union reply_descriptor {
+        u64 word;
+        struct {
+                u32 low;
+                u32 high;
+        } u;
+};
+
 /**
  * _base_interrupt - MPT adapter (IOC) specific interrupt handler.
  * @irq: irq number (not used)
@@ -698,47 +706,38 @@ _base_unmask_interrupts(struct MPT2SAS_ADAPTER *ioc)
 static irqreturn_t
 _base_interrupt(int irq, void *bus_id)
 {
-        union reply_descriptor {
-                u64 word;
-                struct {
-                        u32 low;
-                        u32 high;
-                } u;
-        };
         union reply_descriptor rd;
-        u32 post_index, post_index_next, completed_cmds;
+        u32 completed_cmds;
         u8 request_desript_type;
         u16 smid;
         u8 cb_idx;
         u32 reply;
         u8 VF_ID;
-        int i;
         struct MPT2SAS_ADAPTER *ioc = bus_id;
+        Mpi2ReplyDescriptorsUnion_t *rpf;
 
         if (ioc->mask_interrupts)
                 return IRQ_NONE;
 
-        post_index = ioc->reply_post_host_index;
-        request_desript_type = ioc->reply_post_free[post_index].
-            Default.ReplyFlags & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
+        rpf = &ioc->reply_post_free[ioc->reply_post_host_index];
+        request_desript_type = rpf->Default.ReplyFlags
+             & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
         if (request_desript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
                 return IRQ_NONE;
 
         completed_cmds = 0;
         do {
-                rd.word = ioc->reply_post_free[post_index].Words;
+                rd.word = rpf->Words;
                 if (rd.u.low == UINT_MAX || rd.u.high == UINT_MAX)
                         goto out;
                 reply = 0;
                 cb_idx = 0xFF;
-                smid = le16_to_cpu(ioc->reply_post_free[post_index].
-                    Default.DescriptorTypeDependent1);
-                VF_ID = ioc->reply_post_free[post_index].
-                    Default.VF_ID;
+                smid = le16_to_cpu(rpf->Default.DescriptorTypeDependent1);
+                VF_ID = rpf->Default.VF_ID;
                 if (request_desript_type ==
                     MPI2_RPY_DESCRIPT_FLAGS_ADDRESS_REPLY) {
-                        reply = le32_to_cpu(ioc->reply_post_free[post_index].
-                            AddressReply.ReplyFrameAddress);
+                        reply = le32_to_cpu
+                                (rpf->AddressReply.ReplyFrameAddress);
                 } else if (request_desript_type ==
                     MPI2_RPY_DESCRIPT_FLAGS_TARGET_COMMAND_BUFFER)
                         goto next;
@@ -765,21 +764,27 @@ _base_interrupt(int irq, void *bus_id)
                             0 : ioc->reply_free_host_index + 1;
                         ioc->reply_free[ioc->reply_free_host_index] =
                             cpu_to_le32(reply);
+                        wmb();
                         writel(ioc->reply_free_host_index,
                             &ioc->chip->ReplyFreeHostIndex);
-                        wmb();
                 }
 
  next:
-                post_index_next = (post_index == (ioc->reply_post_queue_depth -
-                    1)) ? 0 : post_index + 1;
+
+                rpf->Words = ULLONG_MAX;
+                ioc->reply_post_host_index = (ioc->reply_post_host_index ==
+                    (ioc->reply_post_queue_depth - 1)) ? 0 :
+                    ioc->reply_post_host_index + 1;
                 request_desript_type =
-                    ioc->reply_post_free[post_index_next].Default.ReplyFlags
-                    & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
+                    ioc->reply_post_free[ioc->reply_post_host_index].Default.
+                    ReplyFlags & MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
                 completed_cmds++;
                 if (request_desript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
                         goto out;
-                post_index = post_index_next;
+                if (!ioc->reply_post_host_index)
+                        rpf = ioc->reply_post_free;
+                else
+                        rpf++;
         } while (1);
 
  out:
@@ -787,19 +792,8 @@ _base_interrupt(int irq, void *bus_id)
         if (!completed_cmds)
                 return IRQ_NONE;
 
-        /* reply post descriptor handling */
-        post_index_next = ioc->reply_post_host_index;
-        for (i = 0 ; i < completed_cmds; i++) {
-                post_index = post_index_next;
-                /* poison the reply post descriptor */
-                ioc->reply_post_free[post_index_next].Words = ULLONG_MAX;
-                post_index_next = (post_index ==
-                    (ioc->reply_post_queue_depth - 1))
-                    ? 0 : post_index + 1;
-        }
-        ioc->reply_post_host_index = post_index_next;
-        writel(post_index_next, &ioc->chip->ReplyPostHostIndex);
         wmb();
+        writel(ioc->reply_post_host_index, &ioc->chip->ReplyPostHostIndex);
         return IRQ_HANDLED;
 }
 
@@ -1542,6 +1536,8 @@ _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
            (ioc->bios_pg3.BiosVersion & 0x0000FF00) >> 8,
             ioc->bios_pg3.BiosVersion & 0x000000FF);
 
+        _base_display_dell_branding(ioc);
+
         printk(MPT2SAS_INFO_FMT "Protocol=(", ioc->name);
 
         if (ioc->facts.ProtocolFlags & MPI2_IOCFACTS_PROTOCOL_SCSI_INITIATOR) {
@@ -1554,8 +1550,6 @@ _base_display_ioc_capabilities(struct MPT2SAS_ADAPTER *ioc)
                 i++;
         }
 
-        _base_display_dell_branding(ioc);
-
         i = 0;
         printk("), ");
         printk("Capabilities=(");
@@ -1627,6 +1621,9 @@ _base_static_config_pages(struct MPT2SAS_ADAPTER *ioc)
         u32 iounit_pg1_flags;
 
         mpt2sas_config_get_manufacturing_pg0(ioc, &mpi_reply, &ioc->manu_pg0);
+        if (ioc->ir_firmware)
+                mpt2sas_config_get_manufacturing_pg10(ioc, &mpi_reply,
+                    &ioc->manu_pg10);
         mpt2sas_config_get_bios_pg2(ioc, &mpi_reply, &ioc->bios_pg2);
         mpt2sas_config_get_bios_pg3(ioc, &mpi_reply, &ioc->bios_pg3);
         mpt2sas_config_get_ioc_pg8(ioc, &mpi_reply, &ioc->ioc_pg8);
@@ -1647,7 +1644,7 @@ _base_static_config_pages(struct MPT2SAS_ADAPTER *ioc)
                 iounit_pg1_flags |=
                     MPI2_IOUNITPAGE1_DISABLE_TASK_SET_FULL_HANDLING;
         ioc->iounit_pg1.Flags = cpu_to_le32(iounit_pg1_flags);
-        mpt2sas_config_set_iounit_pg1(ioc, &mpi_reply, ioc->iounit_pg1);
+        mpt2sas_config_set_iounit_pg1(ioc, &mpi_reply, &ioc->iounit_pg1);
 }
 
 /**
@@ -3303,13 +3300,11 @@ mpt2sas_base_attach(struct MPT2SAS_ADAPTER *ioc)
         ioc->tm_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
         ioc->tm_cmds.status = MPT2_CMD_NOT_USED;
         mutex_init(&ioc->tm_cmds.mutex);
-        init_completion(&ioc->tm_cmds.done);
 
         /* config page internal command bits */
         ioc->config_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
         ioc->config_cmds.status = MPT2_CMD_NOT_USED;
         mutex_init(&ioc->config_cmds.mutex);
-        init_completion(&ioc->config_cmds.done);
 
         /* ctl module internal command bits */
         ioc->ctl_cmds.reply = kzalloc(ioc->reply_sz, GFP_KERNEL);
@@ -3433,6 +3428,7 @@ _base_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
                 if (ioc->config_cmds.status & MPT2_CMD_PENDING) {
                         ioc->config_cmds.status |= MPT2_CMD_RESET;
                         mpt2sas_base_free_smid(ioc, ioc->config_cmds.smid);
+                        ioc->config_cmds.smid = USHORT_MAX;
                         complete(&ioc->config_cmds.done);
                 }
                 break;
@@ -3501,20 +3497,13 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
             __func__));
 
         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (ioc->ioc_reset_in_progress) {
+        if (ioc->shost_recovery) {
                 spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
                 printk(MPT2SAS_ERR_FMT "%s: busy\n",
                     ioc->name, __func__);
                 return -EBUSY;
         }
-        ioc->ioc_reset_in_progress = 1;
         ioc->shost_recovery = 1;
-        if (ioc->shost->shost_state == SHOST_RUNNING) {
-                /* set back to SHOST_RUNNING in mpt2sas_scsih.c */
-                scsi_host_set_state(ioc->shost, SHOST_RECOVERY);
-                printk(MPT2SAS_INFO_FMT "putting controller into "
-                    "SHOST_RECOVERY\n", ioc->name);
-        }
         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         _base_reset_handler(ioc, MPT2_IOC_PRE_RESET);
@@ -3534,7 +3523,10 @@ mpt2sas_base_hard_reset_handler(struct MPT2SAS_ADAPTER *ioc, int sleep_flag,
             ioc->name, __func__, ((r == 0) ? "SUCCESS" : "FAILED")));
 
         spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        ioc->ioc_reset_in_progress = 0;
+        ioc->shost_recovery = 0;
         spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+
+        if (!r)
+                _base_reset_handler(ioc, MPT2_IOC_RUNNING);
         return r;
 }
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index acdcff150a35..2faab1e690e9 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -69,10 +69,10 @@
 #define MPT2SAS_DRIVER_NAME             "mpt2sas"
 #define MPT2SAS_AUTHOR  "LSI Corporation <DL-MPTFusionLinux@lsi.com>"
 #define MPT2SAS_DESCRIPTION     "LSI MPT Fusion SAS 2.0 Device Driver"
-#define MPT2SAS_DRIVER_VERSION          "01.100.04.00"
+#define MPT2SAS_DRIVER_VERSION          "01.100.06.00"
 #define MPT2SAS_MAJOR_VERSION           01
 #define MPT2SAS_MINOR_VERSION           100
-#define MPT2SAS_BUILD_VERSION           04
+#define MPT2SAS_BUILD_VERSION           06
 #define MPT2SAS_RELEASE_VERSION         00
 
 /*
@@ -119,6 +119,7 @@
 #define MPT2_IOC_PRE_RESET              1 /* prior to host reset */
 #define MPT2_IOC_AFTER_RESET            2 /* just after host reset */
 #define MPT2_IOC_DONE_RESET             3 /* links re-initialized */
+#define MPT2_IOC_RUNNING                4 /* shost running */
 
 /*
  * logging format
@@ -196,6 +197,38 @@ struct MPT2SAS_TARGET {
  * @block: device is in SDEV_BLOCK state
  * @tlr_snoop_check: flag used in determining whether to disable TLR
  */
+
+/* OEM Identifiers */
+#define MFG10_OEM_ID_INVALID                   (0x00000000)
+#define MFG10_OEM_ID_DELL                      (0x00000001)
+#define MFG10_OEM_ID_FSC                       (0x00000002)
+#define MFG10_OEM_ID_SUN                       (0x00000003)
+#define MFG10_OEM_ID_IBM                       (0x00000004)
+
+/* GENERIC Flags 0*/
+#define MFG10_GF0_OCE_DISABLED                 (0x00000001)
+#define MFG10_GF0_R1E_DRIVE_COUNT              (0x00000002)
+#define MFG10_GF0_R10_DISPLAY                  (0x00000004)
+#define MFG10_GF0_SSD_DATA_SCRUB_DISABLE       (0x00000008)
+#define MFG10_GF0_SINGLE_DRIVE_R0              (0x00000010)
+
+/* OEM Specific Flags will come from OEM specific header files */
+typedef struct _MPI2_CONFIG_PAGE_MAN_10 {
+    MPI2_CONFIG_PAGE_HEADER Header;                                 /* 00h */
+    U8                      OEMIdentifier;                          /* 04h */
+    U8                      Reserved1;                              /* 05h */
+    U16                     Reserved2;                              /* 08h */
+    U32                     Reserved3;                              /* 0Ch */
+    U32                     GenericFlags0;                          /* 10h */
+    U32                     GenericFlags1;                          /* 14h */
+    U32                     Reserved4;                              /* 18h */
+    U32                     OEMSpecificFlags0;                      /* 1Ch */
+    U32                     OEMSpecificFlags1;                      /* 20h */
+    U32                     Reserved5[18];                          /* 24h-60h*/
+} MPI2_CONFIG_PAGE_MAN_10,
+  MPI2_POINTER PTR_MPI2_CONFIG_PAGE_MAN_10,
+  Mpi2ManufacturingPage10_t, MPI2_POINTER pMpi2ManufacturingPage10_t;
+
 struct MPT2SAS_DEVICE {
         struct MPT2SAS_TARGET *sas_target;
         unsigned int    lun;
@@ -431,7 +464,7 @@ typedef void (*MPT_ADD_SGE)(void *paddr, u32 flags_length, dma_addr_t dma_addr);
  * @fw_event_list: list of fw events
  * @aen_event_read_flag: event log was read
  * @broadcast_aen_busy: broadcast aen waiting to be serviced
- * @ioc_reset_in_progress: host reset in progress
+ * @shost_recovery: host reset in progress
  * @ioc_reset_in_progress_lock:
  * @ioc_link_reset_in_progress: phy/hard reset in progress
  * @ignore_loginfos: ignore loginfos during task managment
@@ -460,6 +493,7 @@ typedef void (*MPT_ADD_SGE)(void *paddr, u32 flags_length, dma_addr_t dma_addr);
  * @facts: static facts data
  * @pfacts: static port facts data
  * @manu_pg0: static manufacturing page 0
+ * @manu_pg10: static manufacturing page 10
  * @bios_pg2: static bios page 2
  * @bios_pg3: static bios page 3
  * @ioc_pg8: static ioc page 8
@@ -544,7 +578,6 @@ struct MPT2SAS_ADAPTER {
          /* misc flags */
         int             aen_event_read_flag;
         u8              broadcast_aen_busy;
-        u8              ioc_reset_in_progress;
         u8              shost_recovery;
         spinlock_t      ioc_reset_in_progress_lock;
         u8              ioc_link_reset_in_progress;
@@ -663,6 +696,7 @@ struct MPT2SAS_ADAPTER {
         dma_addr_t      diag_buffer_dma[MPI2_DIAG_BUF_TYPE_COUNT];
         u8              diag_buffer_status[MPI2_DIAG_BUF_TYPE_COUNT];
         u32             unique_id[MPI2_DIAG_BUF_TYPE_COUNT];
+        Mpi2ManufacturingPage10_t manu_pg10;
         u32             product_specific[MPI2_DIAG_BUF_TYPE_COUNT][23];
         u32             diagnostic_flags[MPI2_DIAG_BUF_TYPE_COUNT];
 };
@@ -734,6 +768,8 @@ void mpt2sas_config_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 re
 int mpt2sas_config_get_number_hba_phys(struct MPT2SAS_ADAPTER *ioc, u8 *num_phys);
 int mpt2sas_config_get_manufacturing_pg0(struct MPT2SAS_ADAPTER *ioc,
     Mpi2ConfigReply_t *mpi_reply, Mpi2ManufacturingPage0_t *config_page);
+int mpt2sas_config_get_manufacturing_pg10(struct MPT2SAS_ADAPTER *ioc,
+    Mpi2ConfigReply_t *mpi_reply, Mpi2ManufacturingPage10_t *config_page);
 int mpt2sas_config_get_bios_pg2(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
     *mpi_reply, Mpi2BiosPage2_t *config_page);
 int mpt2sas_config_get_bios_pg3(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
@@ -749,7 +785,7 @@ int mpt2sas_config_get_sas_iounit_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRep
 int mpt2sas_config_get_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
     *mpi_reply, Mpi2IOUnitPage1_t *config_page);
 int mpt2sas_config_set_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
-    *mpi_reply, Mpi2IOUnitPage1_t config_page);
+    *mpi_reply, Mpi2IOUnitPage1_t *config_page);
 int mpt2sas_config_get_sas_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
     *mpi_reply, Mpi2SasIOUnitPage1_t *config_page, u16 sz);
 int mpt2sas_config_get_ioc_pg8(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
@@ -776,7 +812,6 @@ int mpt2sas_config_get_volume_handle(struct MPT2SAS_ADAPTER *ioc, u16 pd_handle,
     u16 *volume_handle);
 int mpt2sas_config_get_volume_wwid(struct MPT2SAS_ADAPTER *ioc, u16 volume_handle,
     u64 *wwid);
-
 /* ctl shared API */
 extern struct device_attribute *mpt2sas_host_attrs[];
 extern struct device_attribute *mpt2sas_dev_attrs[];
@@ -798,9 +833,11 @@ int mpt2sas_transport_add_host_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
     *mpt2sas_phy, Mpi2SasPhyPage0_t phy_pg0, struct device *parent_dev);
 int mpt2sas_transport_add_expander_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
     *mpt2sas_phy, Mpi2ExpanderPage1_t expander_pg1, struct device *parent_dev);
-void mpt2sas_transport_update_phy_link_change(struct MPT2SAS_ADAPTER *ioc, u16 handle,
+void mpt2sas_transport_update_links(struct MPT2SAS_ADAPTER *ioc, u16 handle,
    u16 attached_handle, u8 phy_number, u8 link_rate);
 extern struct sas_function_template mpt2sas_transport_functions;
 extern struct scsi_transport_template *mpt2sas_transport_template;
+extern int scsi_internal_device_block(struct scsi_device *sdev);
+extern int scsi_internal_device_unblock(struct scsi_device *sdev);
 
 #endif /* MPT2SAS_BASE_H_INCLUDED */
diff --git a/drivers/scsi/mpt2sas/mpt2sas_config.c b/drivers/scsi/mpt2sas/mpt2sas_config.c
index 6ddee161beb3..ab8c560865d8 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_config.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_config.c
@@ -72,15 +72,15 @@
 
 /**
  * struct config_request - obtain dma memory via routine
- * @config_page_sz: size
- * @config_page: virt pointer
- * @config_page_dma: phys pointer
+ * @sz: size
+ * @page: virt pointer
+ * @page_dma: phys pointer
  *
  */
 struct config_request{
-        u16                     config_page_sz;
-        void                    *config_page;
-        dma_addr_t              config_page_dma;
+        u16                     sz;
+        void                    *page;
+        dma_addr_t              page_dma;
 };
 
 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
@@ -175,6 +175,55 @@ _config_display_some_debug(struct MPT2SAS_ADAPTER *ioc, u16 smid,
 #endif
 
 /**
+ * _config_alloc_config_dma_memory - obtain physical memory
+ * @ioc: per adapter object
+ * @mem: struct config_request
+ *
+ * A wrapper for obtaining dma-able memory for config page request.
+ *
+ * Returns 0 for success, non-zero for failure.
+ */
+static int
+_config_alloc_config_dma_memory(struct MPT2SAS_ADAPTER *ioc,
+    struct config_request *mem)
+{
+        int r = 0;
+
+        if (mem->sz > ioc->config_page_sz) {
+                mem->page = dma_alloc_coherent(&ioc->pdev->dev, mem->sz,
+                    &mem->page_dma, GFP_KERNEL);
+                if (!mem->page) {
+                        printk(MPT2SAS_ERR_FMT "%s: dma_alloc_coherent"
+                            " failed asking for (%d) bytes!!\n",
+                            ioc->name, __func__, mem->sz);
+                        r = -ENOMEM;
+                }
+        } else { /* use tmp buffer if less than 512 bytes */
+                mem->page = ioc->config_page;
+                mem->page_dma = ioc->config_page_dma;
+        }
+        return r;
+}
+
+/**
+ * _config_free_config_dma_memory - wrapper to free the memory
+ * @ioc: per adapter object
+ * @mem: struct config_request
+ *
+ * A wrapper to free dma-able memory when using _config_alloc_config_dma_memory.
+ *
+ * Returns 0 for success, non-zero for failure.
+ */
+static void
+_config_free_config_dma_memory(struct MPT2SAS_ADAPTER *ioc,
+    struct config_request *mem)
+{
+        if (mem->sz > ioc->config_page_sz)
+                dma_free_coherent(&ioc->pdev->dev, mem->sz, mem->page,
+                    mem->page_dma);
+}
+
+/**
  * mpt2sas_config_done - config page completion routine
  * @ioc: per adapter object
  * @smid: system request message index
@@ -206,6 +255,7 @@ mpt2sas_config_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
         _config_display_some_debug(ioc, smid, "config_done", mpi_reply);
 #endif
+        ioc->config_cmds.smid = USHORT_MAX;
         complete(&ioc->config_cmds.done);
 }
 
@@ -215,7 +265,9 @@ mpt2sas_config_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
  * @mpi_request: request message frame
  * @mpi_reply: reply mf payload returned from firmware
  * @timeout: timeout in seconds
- * Context: sleep, the calling function needs to acquire the config_cmds.mutex
+ * @config_page: contents of the config page
+ * @config_page_sz: size of config page
+ * Context: sleep
  *
  * A generic API for config page requests to firmware.
  *
@@ -228,16 +280,17 @@ mpt2sas_config_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
  */
 static int
 _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
-    *mpi_request, Mpi2ConfigReply_t *mpi_reply, int timeout)
+    *mpi_request, Mpi2ConfigReply_t *mpi_reply, int timeout,
+    void *config_page, u16 config_page_sz)
 {
         u16 smid;
         u32 ioc_state;
         unsigned long timeleft;
         Mpi2ConfigRequest_t *config_request;
         int r;
-        u8 retry_count;
-        u8 issue_host_reset = 0;
+        u8 retry_count, issue_host_reset = 0;
         u16 wait_state_count;
+        struct config_request mem;
 
         mutex_lock(&ioc->config_cmds.mutex);
         if (ioc->config_cmds.status != MPT2_CMD_NOT_USED) {
@@ -246,12 +299,44 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
                 mutex_unlock(&ioc->config_cmds.mutex);
                 return -EAGAIN;
         }
+
         retry_count = 0;
+        memset(&mem, 0, sizeof(struct config_request));
+
+        if (config_page) {
+                mpi_request->Header.PageVersion = mpi_reply->Header.PageVersion;
+                mpi_request->Header.PageNumber = mpi_reply->Header.PageNumber;
+                mpi_request->Header.PageType = mpi_reply->Header.PageType;
+                mpi_request->Header.PageLength = mpi_reply->Header.PageLength;
+                mpi_request->ExtPageLength = mpi_reply->ExtPageLength;
+                mpi_request->ExtPageType = mpi_reply->ExtPageType;
+                if (mpi_request->Header.PageLength)
+                        mem.sz = mpi_request->Header.PageLength * 4;
+                else
+                        mem.sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
+                r = _config_alloc_config_dma_memory(ioc, &mem);
+                if (r != 0)
+                        goto out;
+                if (mpi_request->Action ==
+                    MPI2_CONFIG_ACTION_PAGE_WRITE_CURRENT) {
+                        ioc->base_add_sg_single(&mpi_request->PageBufferSGE,
+                            MPT2_CONFIG_COMMON_WRITE_SGLFLAGS | mem.sz,
+                            mem.page_dma);
+                        memcpy(mem.page, config_page, min_t(u16, mem.sz,
+                            config_page_sz));
+                } else {
+                        memset(config_page, 0, config_page_sz);
+                        ioc->base_add_sg_single(&mpi_request->PageBufferSGE,
+                            MPT2_CONFIG_COMMON_SGLFLAGS | mem.sz, mem.page_dma);
+                }
+        }
 
  retry_config:
         if (retry_count) {
-                if (retry_count > 2) /* attempt only 2 retries */
-                        return -EFAULT;
+                if (retry_count > 2) { /* attempt only 2 retries */
+                        r = -EFAULT;
+                        goto free_mem;
+                }
                 printk(MPT2SAS_INFO_FMT "%s: attempting retry (%d)\n",
                     ioc->name, __func__, retry_count);
         }
@@ -262,8 +347,9 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
                         printk(MPT2SAS_ERR_FMT
                             "%s: failed due to ioc not operational\n",
                             ioc->name, __func__);
+                        ioc->config_cmds.status = MPT2_CMD_NOT_USED;
                         r = -EFAULT;
-                        goto out;
+                        goto free_mem;
                 }
                 ssleep(1);
                 ioc_state = mpt2sas_base_get_iocstate(ioc, 1);
@@ -279,8 +365,9 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
         if (!smid) {
                 printk(MPT2SAS_ERR_FMT "%s: failed obtaining a smid\n",
                     ioc->name, __func__);
+                ioc->config_cmds.status = MPT2_CMD_NOT_USED;
                 r = -EAGAIN;
-                goto out;
+                goto free_mem;
         }
 
         r = 0;
@@ -292,6 +379,7 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
 #ifdef CONFIG_SCSI_MPT2SAS_LOGGING
         _config_display_some_debug(ioc, smid, "config_request", NULL);
 #endif
+        init_completion(&ioc->config_cmds.done);
         mpt2sas_base_put_smid_default(ioc, smid, config_request->VF_ID);
         timeleft = wait_for_completion_timeout(&ioc->config_cmds.done,
             timeout*HZ);
@@ -303,22 +391,31 @@ _config_request(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigRequest_t
                 retry_count++;
                 if (ioc->config_cmds.smid == smid)
                         mpt2sas_base_free_smid(ioc, smid);
-                if ((ioc->shost_recovery) ||
-                    (ioc->config_cmds.status & MPT2_CMD_RESET))
+                if ((ioc->shost_recovery) || (ioc->config_cmds.status &
+                    MPT2_CMD_RESET))
                         goto retry_config;
                 issue_host_reset = 1;
                 r = -EFAULT;
-                goto out;
+                goto free_mem;
         }
+
         if (ioc->config_cmds.status & MPT2_CMD_REPLY_VALID)
                 memcpy(mpi_reply, ioc->config_cmds.reply,
                     sizeof(Mpi2ConfigReply_t));
         if (retry_count)
-                printk(MPT2SAS_INFO_FMT "%s: retry completed!!\n",
-                    ioc->name, __func__);
-out:
+                printk(MPT2SAS_INFO_FMT "%s: retry (%d) completed!!\n",
+                    ioc->name, __func__, retry_count);
+        if (config_page && mpi_request->Action ==
+            MPI2_CONFIG_ACTION_PAGE_READ_CURRENT)
+                memcpy(config_page, mem.page, min_t(u16, mem.sz,
+                    config_page_sz));
+ free_mem:
+        if (config_page)
+                _config_free_config_dma_memory(ioc, &mem);
+ out:
         ioc->config_cmds.status = MPT2_CMD_NOT_USED;
         mutex_unlock(&ioc->config_cmds.mutex);
+
         if (issue_host_reset)
                 mpt2sas_base_hard_reset_handler(ioc, CAN_SLEEP,
                     FORCE_BIG_HAMMER);
@@ -326,46 +423,43 @@ out:
 }
 
 /**
- * _config_alloc_config_dma_memory - obtain physical memory
+ * mpt2sas_config_get_manufacturing_pg0 - obtain manufacturing page 0
  * @ioc: per adapter object
- * @mem: struct config_request
- *
- * A wrapper for obtaining dma-able memory for config page request.
+ * @mpi_reply: reply mf payload returned from firmware
+ * @config_page: contents of the config page
+ * Context: sleep.
  *
  * Returns 0 for success, non-zero for failure.
  */
-static int
-_config_alloc_config_dma_memory(struct MPT2SAS_ADAPTER *ioc,
-    struct config_request *mem)
+int
+mpt2sas_config_get_manufacturing_pg0(struct MPT2SAS_ADAPTER *ioc,
+    Mpi2ConfigReply_t *mpi_reply, Mpi2ManufacturingPage0_t *config_page)
 {
-        int r = 0;
+        Mpi2ConfigRequest_t mpi_request;
+        int r;
 
-        mem->config_page = pci_alloc_consistent(ioc->pdev, mem->config_page_sz,
-            &mem->config_page_dma);
-        if (!mem->config_page)
-                r = -ENOMEM;
-        return r;
-}
+        memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
+        mpi_request.Function = MPI2_FUNCTION_CONFIG;
+        mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
+        mpi_request.Header.PageType = MPI2_CONFIG_PAGETYPE_MANUFACTURING;
+        mpi_request.Header.PageNumber = 0;
+        mpi_request.Header.PageVersion = MPI2_MANUFACTURING0_PAGEVERSION;
+        mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
+        r = _config_request(ioc, &mpi_request, mpi_reply,
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
+        if (r)
+                goto out;
 
-/**
- * _config_free_config_dma_memory - wrapper to free the memory
- * @ioc: per adapter object
- * @mem: struct config_request
- *
- * A wrapper to free dma-able memory when using _config_alloc_config_dma_memory.
- *
- * Returns 0 for success, non-zero for failure.
- */
-static void
-_config_free_config_dma_memory(struct MPT2SAS_ADAPTER *ioc,
-    struct config_request *mem)
-{
-        pci_free_consistent(ioc->pdev, mem->config_page_sz, mem->config_page,
-            mem->config_page_dma);
+        mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
+        r = _config_request(ioc, &mpi_request, mpi_reply,
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
+ out:
+        return r;
 }
 
 /**
- * mpt2sas_config_get_manufacturing_pg0 - obtain manufacturing page 0
+ * mpt2sas_config_get_manufacturing_pg10 - obtain manufacturing page 10
  * @ioc: per adapter object
  * @mpi_reply: reply mf payload returned from firmware
  * @config_page: contents of the config page
@@ -374,53 +468,28 @@ _config_free_config_dma_memory(struct MPT2SAS_ADAPTER *ioc,
  * Returns 0 for success, non-zero for failure.
  */
 int
-mpt2sas_config_get_manufacturing_pg0(struct MPT2SAS_ADAPTER *ioc,
-    Mpi2ConfigReply_t *mpi_reply, Mpi2ManufacturingPage0_t *config_page)
+mpt2sas_config_get_manufacturing_pg10(struct MPT2SAS_ADAPTER *ioc,
+    Mpi2ConfigReply_t *mpi_reply, Mpi2ManufacturingPage10_t *config_page)
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2ManufacturingPage0_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
         mpi_request.Header.PageType = MPI2_CONFIG_PAGETYPE_MANUFACTURING;
-        mpi_request.Header.PageNumber = 0;
+        mpi_request.Header.PageNumber = 10;
         mpi_request.Header.PageVersion = MPI2_MANUFACTURING0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2ManufacturingPage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -440,9 +509,7 @@ mpt2sas_config_get_bios_pg2(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2BiosPage2_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -451,37 +518,14 @@ mpt2sas_config_get_bios_pg2(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_BIOSPAGE2_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2BiosPage2_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -501,9 +545,7 @@ mpt2sas_config_get_bios_pg3(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2BiosPage3_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -512,37 +554,14 @@ mpt2sas_config_get_bios_pg3(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_BIOSPAGE3_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2BiosPage3_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -562,9 +581,7 @@ mpt2sas_config_get_iounit_pg0(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2IOUnitPage0_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -573,37 +590,14 @@ mpt2sas_config_get_iounit_pg0(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_IOUNITPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2IOUnitPage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -623,9 +617,7 @@ mpt2sas_config_get_iounit_pg1(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2IOUnitPage1_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -634,37 +626,14 @@ mpt2sas_config_get_iounit_pg1(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_IOUNITPAGE1_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2IOUnitPage1_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -680,11 +649,10 @@ mpt2sas_config_get_iounit_pg1(struct MPT2SAS_ADAPTER *ioc,
  */
 int
 mpt2sas_config_set_iounit_pg1(struct MPT2SAS_ADAPTER *ioc,
-    Mpi2ConfigReply_t *mpi_reply, Mpi2IOUnitPage1_t config_page)
+    Mpi2ConfigReply_t *mpi_reply, Mpi2IOUnitPage1_t *config_page)
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
@@ -694,38 +662,14 @@ mpt2sas_config_set_iounit_pg1(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_IOUNITPAGE1_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_WRITE_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-
-        memset(mem.config_page, 0, mem.config_page_sz);
-        memcpy(mem.config_page, &config_page,
-            sizeof(Mpi2IOUnitPage1_t));
-
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_WRITE_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -745,9 +689,7 @@ mpt2sas_config_get_ioc_pg8(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2IOCPage8_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -756,37 +698,14 @@ mpt2sas_config_get_ioc_pg8(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_IOCPAGE8_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2IOCPage8_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -808,9 +727,7 @@ mpt2sas_config_get_sas_device_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2SasDevicePage0_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -820,39 +737,15 @@ mpt2sas_config_get_sas_device_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageNumber = 0;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2SasDevicePage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -874,9 +767,7 @@ mpt2sas_config_get_sas_device_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2SasDevicePage1_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -886,39 +777,15 @@ mpt2sas_config_get_sas_device_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageNumber = 1;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2SasDevicePage1_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -936,11 +803,11 @@ mpt2sas_config_get_number_hba_phys(struct MPT2SAS_ADAPTER *ioc, u8 *num_phys)
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
         u16 ioc_status;
         Mpi2ConfigReply_t mpi_reply;
         Mpi2SasIOUnitPage0_t config_page;
 
+        *num_phys = 0;
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -950,44 +817,20 @@ mpt2sas_config_get_number_hba_phys(struct MPT2SAS_ADAPTER *ioc, u8 *num_phys)
         mpi_request.Header.PageVersion = MPI2_SASIOUNITPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, &mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply.Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply.Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply.Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply.ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply.ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply.ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, &mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, &config_page,
+            sizeof(Mpi2SasIOUnitPage0_t));
         if (!r) {
                 ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
                     MPI2_IOCSTATUS_MASK;
-                if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
-                        memcpy(&config_page, mem.config_page,
-                            min_t(u16, mem.config_page_sz,
-                            sizeof(Mpi2SasIOUnitPage0_t)));
+                if (ioc_status == MPI2_IOCSTATUS_SUCCESS)
                         *num_phys = config_page.NumPhys;
-                }
         }
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
  out:
         return r;
 }
@@ -1011,8 +854,7 @@ mpt2sas_config_get_sas_iounit_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
-        memset(config_page, 0, sz);
+
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1022,37 +864,13 @@ mpt2sas_config_get_sas_iounit_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASIOUNITPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, sz, mem.config_page_sz));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page, sz);
  out:
         return r;
 }
@@ -1076,9 +894,7 @@ mpt2sas_config_get_sas_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sz);
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1088,37 +904,13 @@ mpt2sas_config_get_sas_iounit_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASIOUNITPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, sz, mem.config_page_sz));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page, sz);
  out:
         return r;
 }
@@ -1140,9 +932,7 @@ mpt2sas_config_get_expander_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2ExpanderPage0_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1152,39 +942,15 @@ mpt2sas_config_get_expander_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASEXPANDER0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2ExpanderPage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1207,9 +973,7 @@ mpt2sas_config_get_expander_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2ExpanderPage1_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1219,7 +983,7 @@ mpt2sas_config_get_expander_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASEXPANDER1_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
@@ -1227,33 +991,9 @@ mpt2sas_config_get_expander_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
             cpu_to_le32(MPI2_SAS_EXPAND_PGAD_FORM_HNDL_PHY_NUM |
             (phy_number << MPI2_SAS_EXPAND_PGAD_PHYNUM_SHIFT) | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2ExpanderPage1_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1275,9 +1015,7 @@ mpt2sas_config_get_enclosure_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2SasEnclosurePage0_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1287,39 +1025,15 @@ mpt2sas_config_get_enclosure_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASENCLOSURE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2SasEnclosurePage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1340,9 +1054,7 @@ mpt2sas_config_get_phy_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2SasPhyPage0_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1352,40 +1064,16 @@ mpt2sas_config_get_phy_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASPHY0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress =
             cpu_to_le32(MPI2_SAS_PHY_PGAD_FORM_PHY_NUMBER | phy_number);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2SasPhyPage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1406,9 +1094,7 @@ mpt2sas_config_get_phy_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2SasPhyPage1_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1418,40 +1104,16 @@ mpt2sas_config_get_phy_pg1(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_SASPHY1_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress =
             cpu_to_le32(MPI2_SAS_PHY_PGAD_FORM_PHY_NUMBER | phy_number);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply->ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply->ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2SasPhyPage1_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1474,9 +1136,7 @@ mpt2sas_config_get_raid_volume_pg1(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2RaidVolPage1_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -1485,38 +1145,15 @@ mpt2sas_config_get_raid_volume_pg1(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_RAIDVOLPAGE1_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2RaidVolPage1_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1535,10 +1172,9 @@ mpt2sas_config_get_number_pds(struct MPT2SAS_ADAPTER *ioc, u16 handle,
     u8 *num_pds)
 {
         Mpi2ConfigRequest_t mpi_request;
-        Mpi2RaidVolPage0_t *config_page;
+        Mpi2RaidVolPage0_t config_page;
         Mpi2ConfigReply_t mpi_reply;
         int r;
-        struct config_request mem;
         u16 ioc_status;
 
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
@@ -1550,43 +1186,23 @@ mpt2sas_config_get_number_pds(struct MPT2SAS_ADAPTER *ioc, u16 handle,
         mpi_request.Header.PageVersion = MPI2_RAIDVOLPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, &mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress =
             cpu_to_le32(MPI2_RAID_VOLUME_PGAD_FORM_HANDLE | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply.Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply.Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply.Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply.Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply.Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, &mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, &config_page,
+            sizeof(Mpi2RaidVolPage0_t));
         if (!r) {
                 ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
                     MPI2_IOCSTATUS_MASK;
-                if (ioc_status == MPI2_IOCSTATUS_SUCCESS) {
-                        config_page = mem.config_page;
-                        *num_pds = config_page->NumPhysDisks;
-                }
+                if (ioc_status == MPI2_IOCSTATUS_SUCCESS)
+                        *num_pds = config_page.NumPhysDisks;
         }
 
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
  out:
         return r;
 }
@@ -1610,10 +1226,8 @@ mpt2sas_config_get_raid_volume_pg0(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
-        memset(config_page, 0, sz);
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
         mpi_request.Header.PageType = MPI2_CONFIG_PAGETYPE_RAID_VOLUME;
@@ -1621,37 +1235,14 @@ mpt2sas_config_get_raid_volume_pg0(struct MPT2SAS_ADAPTER *ioc,
         mpi_request.Header.PageVersion = MPI2_RAIDVOLPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | handle);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, sz, mem.config_page_sz));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page, sz);
  out:
         return r;
 }
@@ -1674,10 +1265,8 @@ mpt2sas_config_get_phys_disk_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
-        memset(config_page, 0, sizeof(Mpi2RaidPhysDiskPage0_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
         mpi_request.Header.PageType = MPI2_CONFIG_PAGETYPE_RAID_PHYSDISK;
@@ -1685,38 +1274,15 @@ mpt2sas_config_get_phys_disk_pg0(struct MPT2SAS_ADAPTER *ioc, Mpi2ConfigReply_t
         mpi_request.Header.PageVersion = MPI2_RAIDPHYSDISKPAGE0_PAGEVERSION;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress = cpu_to_le32(form | form_specific);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply->Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply->Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply->Header.PageType;
-        mpi_request.Header.PageLength = mpi_reply->Header.PageLength;
-        mem.config_page_sz = le16_to_cpu(mpi_reply->Header.PageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
         r = _config_request(ioc, &mpi_request, mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
-        if (!r)
-                memcpy(config_page, mem.config_page,
-                    min_t(u16, mem.config_page_sz,
-                    sizeof(Mpi2RaidPhysDiskPage0_t)));
-
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            sizeof(*config_page));
  out:
         return r;
 }
@@ -1734,11 +1300,10 @@ int
 mpt2sas_config_get_volume_handle(struct MPT2SAS_ADAPTER *ioc, u16 pd_handle,
     u16 *volume_handle)
 {
-        Mpi2RaidConfigurationPage0_t *config_page;
+        Mpi2RaidConfigurationPage0_t *config_page = NULL;
         Mpi2ConfigRequest_t mpi_request;
         Mpi2ConfigReply_t mpi_reply;
-        int r, i;
-        struct config_request mem;
+        int r, i, config_page_sz;
         u16 ioc_status;
 
         *volume_handle = 0;
@@ -1751,40 +1316,27 @@ mpt2sas_config_get_volume_handle(struct MPT2SAS_ADAPTER *ioc, u16 pd_handle,
         mpi_request.Header.PageNumber = 0;
         mpt2sas_base_build_zero_len_sge(ioc, &mpi_request.PageBufferSGE);
         r = _config_request(ioc, &mpi_request, &mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, NULL, 0);
         if (r)
                 goto out;
 
         mpi_request.PageAddress =
             cpu_to_le32(MPI2_RAID_PGAD_FORM_ACTIVE_CONFIG);
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_READ_CURRENT;
-        mpi_request.Header.PageVersion = mpi_reply.Header.PageVersion;
-        mpi_request.Header.PageNumber = mpi_reply.Header.PageNumber;
-        mpi_request.Header.PageType = mpi_reply.Header.PageType;
-        mpi_request.ExtPageLength = mpi_reply.ExtPageLength;
-        mpi_request.ExtPageType = mpi_reply.ExtPageType;
-        mem.config_page_sz = le16_to_cpu(mpi_reply.ExtPageLength) * 4;
-        if (mem.config_page_sz > ioc->config_page_sz) {
-                r = _config_alloc_config_dma_memory(ioc, &mem);
-                if (r)
-                        goto out;
-        } else {
-                mem.config_page_dma = ioc->config_page_dma;
-                mem.config_page = ioc->config_page;
-        }
-        ioc->base_add_sg_single(&mpi_request.PageBufferSGE,
-            MPT2_CONFIG_COMMON_SGLFLAGS | mem.config_page_sz,
-            mem.config_page_dma);
+        config_page_sz = (le16_to_cpu(mpi_reply.ExtPageLength) * 4);
+        config_page = kmalloc(config_page_sz, GFP_KERNEL);
+        if (!config_page)
+                goto out;
         r = _config_request(ioc, &mpi_request, &mpi_reply,
-            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT);
+            MPT2_CONFIG_PAGE_DEFAULT_TIMEOUT, config_page,
+            config_page_sz);
         if (r)
                 goto out;
 
         r = -1;
         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) & MPI2_IOCSTATUS_MASK;
         if (ioc_status != MPI2_IOCSTATUS_SUCCESS)
-                goto done;
-        config_page = mem.config_page;
+                goto out;
         for (i = 0; i < config_page->NumElements; i++) {
                 if ((config_page->ConfigElement[i].ElementFlags &
                     MPI2_RAIDCONFIG0_EFLAGS_MASK_ELEMENT_TYPE) !=
@@ -1795,15 +1347,11 @@ mpt2sas_config_get_volume_handle(struct MPT2SAS_ADAPTER *ioc, u16 pd_handle,
                         *volume_handle = le16_to_cpu(config_page->
                             ConfigElement[i].VolDevHandle);
                         r = 0;
-                        goto done;
+                        goto out;
                 }
         }
-
- done:
-        if (mem.config_page_sz > ioc->config_page_sz)
-                _config_free_config_dma_memory(ioc, &mem);
-
  out:
+        kfree(config_page);
         return r;
 }
 
diff --git a/drivers/scsi/mpt2sas/mpt2sas_ctl.c b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
index 14e473d1fa7b..c2a51018910f 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_ctl.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_ctl.c
@@ -1963,7 +1963,6 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg)
 {
         enum block_state state;
         long ret = -EINVAL;
-        unsigned long flags;
 
         state = (file->f_flags & O_NONBLOCK) ? NON_BLOCKING :
             BLOCKING;
@@ -1989,13 +1988,8 @@ _ctl_ioctl_main(struct file *file, unsigned int cmd, void __user *arg)
                     !ioc)
                         return -ENODEV;
 
-                spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-                if (ioc->shost_recovery) {
-                        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock,
-                            flags);
+                if (ioc->shost_recovery)
                         return -EAGAIN;
-                }
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
                 if (_IOC_SIZE(cmd) == sizeof(struct mpt2_ioctl_command)) {
                         uarg = arg;
@@ -2098,7 +2092,6 @@ _ctl_compat_mpt_command(struct file *file, unsigned cmd, unsigned long arg)
         struct mpt2_ioctl_command karg;
         struct MPT2SAS_ADAPTER *ioc;
         enum block_state state;
-        unsigned long flags;
 
         if (_IOC_SIZE(cmd) != sizeof(struct mpt2_ioctl_command32))
                 return -EINVAL;
@@ -2113,13 +2106,8 @@ _ctl_compat_mpt_command(struct file *file, unsigned cmd, unsigned long arg)
         if (_ctl_verify_adapter(karg32.hdr.ioc_number, &ioc) == -1 || !ioc)
                 return -ENODEV;
 
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (ioc->shost_recovery) {
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock,
-                    flags);
+        if (ioc->shost_recovery)
                 return -EAGAIN;
-        }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         memset(&karg, 0, sizeof(struct mpt2_ioctl_command));
         karg.hdr.ioc_number = karg32.hdr.ioc_number;
diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 2e9a4445596f..774b34525bba 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -103,7 +103,6 @@ struct sense_info {
 };
 
 
-#define MPT2SAS_RESCAN_AFTER_HOST_RESET (0xFFFF)
 /**
  * struct fw_event_work - firmware event struct
  * @list: link list framework
@@ -1502,7 +1501,13 @@ _scsih_slave_configure(struct scsi_device *sdev)
                         break;
                 case MPI2_RAID_VOL_TYPE_RAID1E:
                         qdepth = MPT2SAS_RAID_QUEUE_DEPTH;
-                        r_level = "RAID1E";
+                        if (ioc->manu_pg10.OEMIdentifier &&
+                            (ioc->manu_pg10.GenericFlags0 &
+                            MFG10_GF0_R10_DISPLAY) &&
+                            !(raid_device->num_pds % 2))
+                                r_level = "RAID10";
+                        else
+                                r_level = "RAID1E";
                         break;
                 case MPI2_RAID_VOL_TYPE_RAID1:
                         qdepth = MPT2SAS_RAID_QUEUE_DEPTH;
@@ -1786,17 +1791,18 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint lun,
         u32 ioc_state;
         unsigned long timeleft;
         u8 VF_ID = 0;
-        unsigned long flags;
 
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (ioc->tm_cmds.status != MPT2_CMD_NOT_USED ||
-            ioc->shost_recovery) {
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+        if (ioc->tm_cmds.status != MPT2_CMD_NOT_USED) {
+                printk(MPT2SAS_INFO_FMT "%s: tm_cmd busy!!!\n",
+                    __func__, ioc->name);
+                return;
+        }
+
+        if (ioc->shost_recovery) {
                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
                     __func__, ioc->name);
                 return;
         }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         ioc_state = mpt2sas_base_get_iocstate(ioc, 0);
         if (ioc_state & MPI2_DOORBELL_USED) {
@@ -1830,6 +1836,7 @@ mpt2sas_scsih_issue_tm(struct MPT2SAS_ADAPTER *ioc, u16 handle, uint lun,
         mpi_request->TaskMID = cpu_to_le16(smid_task);
         int_to_scsilun(lun, (struct scsi_lun *)mpi_request->LUN);
         mpt2sas_scsih_set_tm_flag(ioc, handle);
+        init_completion(&ioc->tm_cmds.done);
         mpt2sas_base_put_smid_hi_priority(ioc, smid, VF_ID);
         timeleft = wait_for_completion_timeout(&ioc->tm_cmds.done, timeout*HZ);
         mpt2sas_scsih_clear_tm_flag(ioc, handle);
@@ -2222,7 +2229,7 @@ _scsih_ublock_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
                             MPT2SAS_INFO_FMT "SDEV_RUNNING: "
                             "handle(0x%04x)\n", ioc->name, handle));
                         sas_device_priv_data->block = 0;
-                        scsi_device_set_state(sdev, SDEV_RUNNING);
+                        scsi_internal_device_unblock(sdev);
                 }
         }
 }
@@ -2251,7 +2258,7 @@ _scsih_block_io_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
                             MPT2SAS_INFO_FMT "SDEV_BLOCK: "
                             "handle(0x%04x)\n", ioc->name, handle));
                         sas_device_priv_data->block = 1;
-                        scsi_device_set_state(sdev, SDEV_BLOCK);
+                        scsi_internal_device_block(sdev);
                 }
         }
 }
@@ -2327,6 +2334,7 @@ _scsih_block_io_to_children_attached_directly(struct MPT2SAS_ADAPTER *ioc,
         u16 handle;
         u16 reason_code;
         u8 phy_number;
+        u8 link_rate;
 
         for (i = 0; i < event_data->NumEntries; i++) {
                 handle = le16_to_cpu(event_data->PHY[i].AttachedDevHandle);
@@ -2337,6 +2345,11 @@ _scsih_block_io_to_children_attached_directly(struct MPT2SAS_ADAPTER *ioc,
                     MPI2_EVENT_SAS_TOPO_RC_MASK;
                 if (reason_code == MPI2_EVENT_SAS_TOPO_RC_DELAY_NOT_RESPONDING)
                         _scsih_block_io_device(ioc, handle);
+                if (reason_code == MPI2_EVENT_SAS_TOPO_RC_PHY_CHANGED) {
+                        link_rate = event_data->PHY[i].LinkRate >> 4;
+                        if (link_rate >= MPI2_SAS_NEG_LINK_RATE_1_5)
+                                _scsih_ublock_io_device(ioc, handle);
+                }
         }
 }
 
@@ -2405,27 +2418,6 @@ _scsih_check_topo_delete_events(struct MPT2SAS_ADAPTER *ioc,
 }
 
 /**
- * _scsih_queue_rescan - queue a topology rescan from user context
- * @ioc: per adapter object
- *
- * Return nothing.
- */
-static void
-_scsih_queue_rescan(struct MPT2SAS_ADAPTER *ioc)
-{
-        struct fw_event_work *fw_event;
-
-        if (ioc->wait_for_port_enable_to_complete)
-                return;
-        fw_event = kzalloc(sizeof(struct fw_event_work), GFP_ATOMIC);
-        if (!fw_event)
-                return;
-        fw_event->event = MPT2SAS_RESCAN_AFTER_HOST_RESET;
-        fw_event->ioc = ioc;
-        _scsih_fw_event_add(ioc, fw_event);
-}
-
-/**
  * _scsih_flush_running_cmds - completing outstanding commands.
  * @ioc: per adapter object
  *
@@ -2456,46 +2448,6 @@ _scsih_flush_running_cmds(struct MPT2SAS_ADAPTER *ioc)
 }
 
 /**
- * mpt2sas_scsih_reset_handler - reset callback handler (for scsih)
- * @ioc: per adapter object
- * @reset_phase: phase
- *
- * The handler for doing any required cleanup or initialization.
- *
- * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
- * MPT2_IOC_DONE_RESET
- *
- * Return nothing.
- */
-void
-mpt2sas_scsih_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
-{
-        switch (reset_phase) {
-        case MPT2_IOC_PRE_RESET:
-                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
-                    "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
-                _scsih_fw_event_off(ioc);
-                break;
-        case MPT2_IOC_AFTER_RESET:
-                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
-                    "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
-                if (ioc->tm_cmds.status & MPT2_CMD_PENDING) {
-                        ioc->tm_cmds.status |= MPT2_CMD_RESET;
-                        mpt2sas_base_free_smid(ioc, ioc->tm_cmds.smid);
-                        complete(&ioc->tm_cmds.done);
-                }
-                _scsih_fw_event_on(ioc);
-                _scsih_flush_running_cmds(ioc);
-                break;
-        case MPT2_IOC_DONE_RESET:
-                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
-                    "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
-                _scsih_queue_rescan(ioc);
-                break;
-        }
-}
-
-/**
  * _scsih_setup_eedp - setup MPI request for EEDP transfer
  * @scmd: pointer to scsi command object
  * @mpi_request: pointer to the SCSI_IO reqest message frame
@@ -2615,7 +2567,6 @@ _scsih_qcmd(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
         Mpi2SCSIIORequest_t *mpi_request;
         u32 mpi_control;
         u16 smid;
-        unsigned long flags;
 
         scmd->scsi_done = done;
         sas_device_priv_data = scmd->device->hostdata;
@@ -2634,13 +2585,10 @@ _scsih_qcmd(struct scsi_cmnd *scmd, void (*done)(struct scsi_cmnd *))
         }
 
         /* see if we are busy with task managment stuff */
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (sas_target_priv_data->tm_busy ||
-            ioc->shost_recovery || ioc->ioc_link_reset_in_progress) {
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+        if (sas_target_priv_data->tm_busy)
+                return SCSI_MLQUEUE_DEVICE_BUSY;
+        else if (ioc->shost_recovery || ioc->ioc_link_reset_in_progress)
                 return SCSI_MLQUEUE_HOST_BUSY;
-        }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         if (scmd->sc_data_direction == DMA_FROM_DEVICE)
                 mpi_control = MPI2_SCSIIO_CONTROL_READ;
@@ -3189,25 +3137,6 @@ _scsih_io_done(struct MPT2SAS_ADAPTER *ioc, u16 smid, u8 VF_ID, u32 reply)
 }
 
 /**
- * _scsih_link_change - process phy link changes
- * @ioc: per adapter object
- * @handle: phy handle
- * @attached_handle: valid for devices attached to link
- * @phy_number: phy number
- * @link_rate: new link rate
- * Context: user.
- *
- * Return nothing.
- */
-static void
-_scsih_link_change(struct MPT2SAS_ADAPTER *ioc, u16 handle, u16 attached_handle,
-   u8 phy_number, u8 link_rate)
-{
-        mpt2sas_transport_update_phy_link_change(ioc, handle, attached_handle,
-            phy_number, link_rate);
-}
-
-/**
  * _scsih_sas_host_refresh - refreshing sas host object contents
  * @ioc: per adapter object
  * @update: update link information
@@ -3251,7 +3180,8 @@ _scsih_sas_host_refresh(struct MPT2SAS_ADAPTER *ioc, u8 update)
                             le16_to_cpu(sas_iounit_pg0->PhyData[i].
                                 ControllerDevHandle);
                         if (update)
-                                _scsih_link_change(ioc,
+                                mpt2sas_transport_update_links(
+                                    ioc,
                                     ioc->sas_hba.phy[i].handle,
                                     le16_to_cpu(sas_iounit_pg0->PhyData[i].
                                     AttachedDevHandle), i,
@@ -3436,6 +3366,9 @@ _scsih_expander_add(struct MPT2SAS_ADAPTER *ioc, u16 handle)
         if (!handle)
                 return -1;
 
+        if (ioc->shost_recovery)
+                return -1;
+
         if ((mpt2sas_config_get_expander_pg0(ioc, &mpi_reply, &expander_pg0,
             MPI2_SAS_EXPAND_PGAD_FORM_HNDL, handle))) {
                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
@@ -3572,6 +3505,9 @@ _scsih_expander_remove(struct MPT2SAS_ADAPTER *ioc, u16 handle)
         struct _sas_node *sas_expander;
         unsigned long flags;
 
+        if (ioc->shost_recovery)
+                return;
+
         spin_lock_irqsave(&ioc->sas_node_lock, flags);
         sas_expander = mpt2sas_scsih_expander_find_by_handle(ioc, handle);
         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
@@ -3743,6 +3679,8 @@ _scsih_remove_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
                 mutex_unlock(&ioc->tm_cmds.mutex);
                 dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "issue target reset "
                     "done: handle(0x%04x)\n", ioc->name, device_handle));
+                if (ioc->shost_recovery)
+                        goto out;
         }
 
         /* SAS_IO_UNIT_CNTR - send REMOVE_DEVICE */
@@ -3765,6 +3703,9 @@ _scsih_remove_device(struct MPT2SAS_ADAPTER *ioc, u16 handle)
             le32_to_cpu(mpi_reply.IOCLogInfo)));
 
  out:
+
+        _scsih_ublock_io_device(ioc, handle);
+
         mpt2sas_transport_port_remove(ioc, sas_device->sas_address,
             sas_device->parent_handle);
 
@@ -3908,6 +3849,8 @@ _scsih_sas_topology_change_event(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID,
                             "expander event\n", ioc->name));
                         return;
                 }
+                if (ioc->shost_recovery)
+                        return;
                 if (event_data->PHY[i].PhyStatus &
                     MPI2_EVENT_SAS_TOPO_PHYSTATUS_VACANT)
                         continue;
@@ -3923,9 +3866,10 @@ _scsih_sas_topology_change_event(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID,
                 case MPI2_EVENT_SAS_TOPO_RC_TARG_ADDED:
                         if (!parent_handle) {
                                 if (phy_number < ioc->sas_hba.num_phys)
-                                        _scsih_link_change(ioc,
-                                           ioc->sas_hba.phy[phy_number].handle,
-                                           handle, phy_number, link_rate_);
+                                        mpt2sas_transport_update_links(
+                                        ioc,
+                                        ioc->sas_hba.phy[phy_number].handle,
+                                        handle, phy_number, link_rate_);
                         } else {
                                 spin_lock_irqsave(&ioc->sas_node_lock, flags);
                                 sas_expander =
@@ -3935,17 +3879,14 @@ _scsih_sas_topology_change_event(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID,
                                     flags);
                                 if (sas_expander) {
                                         if (phy_number < sas_expander->num_phys)
-                                                _scsih_link_change(ioc,
-                                                   sas_expander->
-                                                   phy[phy_number].handle,
-                                                   handle, phy_number,
-                                                   link_rate_);
+                                                mpt2sas_transport_update_links(
+                                                ioc,
+                                                sas_expander->
+                                                phy[phy_number].handle,
+                                                handle, phy_number,
+                                                link_rate_);
                                 }
                         }
-                        if (reason_code == MPI2_EVENT_SAS_TOPO_RC_PHY_CHANGED) {
-                                if (link_rate_ >= MPI2_SAS_NEG_LINK_RATE_1_5)
-                                        _scsih_ublock_io_device(ioc, handle);
-                        }
                         if (reason_code == MPI2_EVENT_SAS_TOPO_RC_TARG_ADDED) {
                                 if (link_rate_ < MPI2_SAS_NEG_LINK_RATE_1_5)
                                         break;
@@ -4455,7 +4396,7 @@ _scsih_sas_pd_add(struct MPT2SAS_ADAPTER *ioc,
                 return;
         }
 
-        _scsih_link_change(ioc,
+        mpt2sas_transport_update_links(ioc,
             le16_to_cpu(sas_device_pg0.ParentDevHandle),
             handle, sas_device_pg0.PhyNum, MPI2_SAS_NEG_LINK_RATE_1_5);
 
@@ -4744,7 +4685,7 @@ _scsih_sas_ir_physical_disk_event(struct MPT2SAS_ADAPTER *ioc, u8 VF_ID,
                         return;
                 }
 
-                _scsih_link_change(ioc,
+                mpt2sas_transport_update_links(ioc,
                     le16_to_cpu(sas_device_pg0.ParentDevHandle),
                     handle, sas_device_pg0.PhyNum, MPI2_SAS_NEG_LINK_RATE_1_5);
 
@@ -5156,22 +5097,9 @@ static void
 _scsih_remove_unresponding_devices(struct MPT2SAS_ADAPTER *ioc)
 {
         struct _sas_device *sas_device, *sas_device_next;
-        struct _sas_node *sas_expander, *sas_expander_next;
+        struct _sas_node *sas_expander;
         struct _raid_device *raid_device, *raid_device_next;
-        unsigned long flags;
 
-        _scsih_search_responding_sas_devices(ioc);
-        _scsih_search_responding_raid_devices(ioc);
-        _scsih_search_responding_expanders(ioc);
-
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        ioc->shost_recovery = 0;
-        if (ioc->shost->shost_state == SHOST_RECOVERY) {
-                printk(MPT2SAS_INFO_FMT "putting controller into "
-                    "SHOST_RUNNING\n", ioc->name);
-                scsi_host_set_state(ioc->shost, SHOST_RUNNING);
-        }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         list_for_each_entry_safe(sas_device, sas_device_next,
             &ioc->sas_device_list, list) {
@@ -5207,16 +5135,63 @@ _scsih_remove_unresponding_devices(struct MPT2SAS_ADAPTER *ioc)
                 _scsih_raid_device_remove(ioc, raid_device);
         }
 
-        list_for_each_entry_safe(sas_expander, sas_expander_next,
-            &ioc->sas_expander_list, list) {
+ retry_expander_search:
+        sas_expander = NULL;
+        list_for_each_entry(sas_expander, &ioc->sas_expander_list, list) {
                 if (sas_expander->responding) {
                         sas_expander->responding = 0;
                         continue;
                 }
-                printk("\tremoving expander: handle(0x%04x), "
-                    " sas_addr(0x%016llx)\n", sas_expander->handle,
-                    (unsigned long long)sas_expander->sas_address);
                 _scsih_expander_remove(ioc, sas_expander->handle);
+                goto retry_expander_search;
+        }
+}
+
+/**
+ * mpt2sas_scsih_reset_handler - reset callback handler (for scsih)
+ * @ioc: per adapter object
+ * @reset_phase: phase
+ *
+ * The handler for doing any required cleanup or initialization.
+ *
+ * The reset phase can be MPT2_IOC_PRE_RESET, MPT2_IOC_AFTER_RESET,
+ * MPT2_IOC_DONE_RESET
+ *
+ * Return nothing.
+ */
+void
+mpt2sas_scsih_reset_handler(struct MPT2SAS_ADAPTER *ioc, int reset_phase)
+{
+        switch (reset_phase) {
+        case MPT2_IOC_PRE_RESET:
+                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+                    "MPT2_IOC_PRE_RESET\n", ioc->name, __func__));
+                _scsih_fw_event_off(ioc);
+                break;
+        case MPT2_IOC_AFTER_RESET:
+                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+                    "MPT2_IOC_AFTER_RESET\n", ioc->name, __func__));
+                if (ioc->tm_cmds.status & MPT2_CMD_PENDING) {
+                        ioc->tm_cmds.status |= MPT2_CMD_RESET;
+                        mpt2sas_base_free_smid(ioc, ioc->tm_cmds.smid);
+                        complete(&ioc->tm_cmds.done);
+                }
+                _scsih_fw_event_on(ioc);
+                _scsih_flush_running_cmds(ioc);
+                break;
+        case MPT2_IOC_DONE_RESET:
+                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+                    "MPT2_IOC_DONE_RESET\n", ioc->name, __func__));
+                _scsih_sas_host_refresh(ioc, 0);
+                _scsih_search_responding_sas_devices(ioc);
+                _scsih_search_responding_raid_devices(ioc);
+                _scsih_search_responding_expanders(ioc);
+                break;
+        case MPT2_IOC_RUNNING:
+                dtmprintk(ioc, printk(MPT2SAS_DEBUG_FMT "%s: "
+                    "MPT2_IOC_RUNNING\n", ioc->name, __func__));
+                _scsih_remove_unresponding_devices(ioc);
+                break;
         }
 }
 
@@ -5236,14 +5211,6 @@ _firmware_event_work(struct work_struct *work)
         unsigned long flags;
         struct MPT2SAS_ADAPTER *ioc = fw_event->ioc;
 
-        /* This is invoked by calling _scsih_queue_rescan(). */
-        if (fw_event->event == MPT2SAS_RESCAN_AFTER_HOST_RESET) {
-                _scsih_fw_event_free(ioc, fw_event);
-                _scsih_sas_host_refresh(ioc, 1);
-                _scsih_remove_unresponding_devices(ioc);
-                return;
-        }
-
         /* the queue is being flushed so ignore this event */
         spin_lock_irqsave(&ioc->fw_event_lock, flags);
         if (ioc->fw_events_off || ioc->remove_host) {
@@ -5253,13 +5220,10 @@ _firmware_event_work(struct work_struct *work)
         }
         spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
 
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
         if (ioc->shost_recovery) {
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
                 _scsih_fw_event_requeue(ioc, fw_event, 1000);
                 return;
         }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         switch (fw_event->event) {
         case MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST:
@@ -5461,6 +5425,8 @@ _scsih_expander_node_remove(struct MPT2SAS_ADAPTER *ioc,
                         if (!sas_device)
                                 continue;
                         _scsih_remove_device(ioc, sas_device->handle);
+                        if (ioc->shost_recovery)
+                                return;
                         goto retry_device_search;
                 }
         }
@@ -5482,6 +5448,8 @@ _scsih_expander_node_remove(struct MPT2SAS_ADAPTER *ioc,
                         if (!expander_sibling)
                                 continue;
                         _scsih_expander_remove(ioc, expander_sibling->handle);
+                        if (ioc->shost_recovery)
+                                return;
                         goto retry_expander_search;
                 }
         }
diff --git a/drivers/scsi/mpt2sas/mpt2sas_transport.c b/drivers/scsi/mpt2sas/mpt2sas_transport.c
index 686695b155c7..742324a0a11e 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_transport.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_transport.c
@@ -140,11 +140,18 @@ _transport_set_identify(struct MPT2SAS_ADAPTER *ioc, u16 handle,
         u32 device_info;
         u32 ioc_status;
 
+        if (ioc->shost_recovery) {
+                printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
+                    __func__, ioc->name);
+                return -EFAULT;
+        }
+
         if ((mpt2sas_config_get_sas_device_pg0(ioc, &mpi_reply, &sas_device_pg0,
             MPI2_SAS_DEVICE_PGAD_FORM_HANDLE, handle))) {
                 printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
+
                     ioc->name, __FILE__, __LINE__, __func__);
-                return -1;
+                return -ENXIO;
         }
 
         ioc_status = le16_to_cpu(mpi_reply.IOCStatus) &
@@ -153,7 +160,7 @@ _transport_set_identify(struct MPT2SAS_ADAPTER *ioc, u16 handle,
                 printk(MPT2SAS_ERR_FMT "handle(0x%04x), ioc_status(0x%04x)"
                     "\nfailure at %s:%d/%s()!\n", ioc->name, handle, ioc_status,
                      __FILE__, __LINE__, __func__);
-                return -1;
+                return -EIO;
         }
 
         memset(identify, 0, sizeof(identify));
@@ -288,21 +295,17 @@ _transport_expander_report_manufacture(struct MPT2SAS_ADAPTER *ioc,
         void *psge;
         u32 sgl_flags;
         u8 issue_reset = 0;
-        unsigned long flags;
         void *data_out = NULL;
         dma_addr_t data_out_dma;
         u32 sz;
         u64 *sas_address_le;
         u16 wait_state_count;
 
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (ioc->ioc_reset_in_progress) {
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+        if (ioc->shost_recovery) {
                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
                     __func__, ioc->name);
                 return -EFAULT;
         }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         mutex_lock(&ioc->transport_cmds.mutex);
 
@@ -789,7 +792,7 @@ mpt2sas_transport_add_expander_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
 }
 
 /**
- * mpt2sas_transport_update_phy_link_change - refreshing phy link changes and attached devices
+ * mpt2sas_transport_update_links - refreshing phy link changes
  * @ioc: per adapter object
  * @handle: handle to sas_host or expander
  * @attached_handle: attached device handle
@@ -799,13 +802,19 @@ mpt2sas_transport_add_expander_phy(struct MPT2SAS_ADAPTER *ioc, struct _sas_phy
  * Returns nothing.
  */
 void
-mpt2sas_transport_update_phy_link_change(struct MPT2SAS_ADAPTER *ioc,
+mpt2sas_transport_update_links(struct MPT2SAS_ADAPTER *ioc,
     u16 handle, u16 attached_handle, u8 phy_number, u8 link_rate)
 {
         unsigned long flags;
         struct _sas_node *sas_node;
         struct _sas_phy *mpt2sas_phy;
 
+        if (ioc->shost_recovery) {
+                printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
+                        __func__, ioc->name);
+                return;
+        }
+
         spin_lock_irqsave(&ioc->sas_node_lock, flags);
         sas_node = _transport_sas_node_find_by_handle(ioc, handle);
         spin_unlock_irqrestore(&ioc->sas_node_lock, flags);
@@ -1025,7 +1034,6 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
         void *psge;
         u32 sgl_flags;
         u8 issue_reset = 0;
-        unsigned long flags;
         dma_addr_t dma_addr_in = 0;
         dma_addr_t dma_addr_out = 0;
         u16 wait_state_count;
@@ -1045,14 +1053,11 @@ _transport_smp_handler(struct Scsi_Host *shost, struct sas_rphy *rphy,
                 return -EINVAL;
         }
 
-        spin_lock_irqsave(&ioc->ioc_reset_in_progress_lock, flags);
-        if (ioc->ioc_reset_in_progress) {
-                spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
+        if (ioc->shost_recovery) {
                 printk(MPT2SAS_INFO_FMT "%s: host reset in progress!\n",
                     __func__, ioc->name);
                 return -EFAULT;
         }
-        spin_unlock_irqrestore(&ioc->ioc_reset_in_progress_lock, flags);
 
         rc = mutex_lock_interruptible(&ioc->transport_cmds.mutex);
         if (rc)
diff --git a/drivers/scsi/pcmcia/nsp_cs.c b/drivers/scsi/pcmcia/nsp_cs.c
index 70b60ade049e..e32c344d7ad8 100644
--- a/drivers/scsi/pcmcia/nsp_cs.c
+++ b/drivers/scsi/pcmcia/nsp_cs.c
@@ -1713,7 +1713,7 @@ static int nsp_cs_config(struct pcmcia_device *link)
 
         nsp_dbg(NSP_DEBUG_INIT, "in");
 
-        cfg_mem = kzalloc(sizeof(cfg_mem), GFP_KERNEL);
+        cfg_mem = kzalloc(sizeof(*cfg_mem), GFP_KERNEL);
         if (!cfg_mem)
                 return -ENOMEM;
         cfg_mem->data = data;
diff --git a/drivers/scsi/pmcraid.c b/drivers/scsi/pmcraid.c
new file mode 100644
index 000000000000..4302f06e4ec9
--- /dev/null
+++ b/drivers/scsi/pmcraid.c
@@ -0,0 +1,5604 @@
+/*
+ * pmcraid.c -- driver for PMC Sierra MaxRAID controller adapters
+ *
+ * Written By: PMC Sierra Corporation
+ *
+ * Copyright (C) 2008, 2009 PMC Sierra Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
+ * USA
+ *
+ */
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/delay.h>
+#include <linux/pci.h>
+#include <linux/wait.h>
+#include <linux/spinlock.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/blkdev.h>
+#include <linux/firmware.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/hdreg.h>
+#include <linux/version.h>
+#include <linux/io.h>
+#include <asm/irq.h>
+#include <asm/processor.h>
+#include <linux/libata.h>
+#include <linux/mutex.h>
+#include <scsi/scsi.h>
+#include <scsi/scsi_host.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsi_eh.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsicam.h>
+
+#include "pmcraid.h"
+
+/*
+ *   Module configuration parameters
+ */
+static unsigned int pmcraid_debug_log;
+static unsigned int pmcraid_disable_aen;
+static unsigned int pmcraid_log_level = IOASC_LOG_LEVEL_MUST;
+
+/*
+ * Data structures to support multiple adapters by the LLD.
+ * pmcraid_adapter_count - count of configured adapters
+ */
+static atomic_t pmcraid_adapter_count = ATOMIC_INIT(0);
+
+/*
+ * Supporting user-level control interface through IOCTL commands.
+ * pmcraid_major - major number to use
+ * pmcraid_minor - minor number(s) to use
+ */
+static unsigned int pmcraid_major;
+static struct class *pmcraid_class;
+DECLARE_BITMAP(pmcraid_minor, PMCRAID_MAX_ADAPTERS);
+
+/*
+ * Module parameters
+ */
+MODULE_AUTHOR("PMC Sierra Corporation, anil_ravindranath@pmc-sierra.com");
+MODULE_DESCRIPTION("PMC Sierra MaxRAID Controller Driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(PMCRAID_DRIVER_VERSION);
+
+module_param_named(log_level, pmcraid_log_level, uint, (S_IRUGO | S_IWUSR));
+MODULE_PARM_DESC(log_level,
+                 "Enables firmware error code logging, default :1 high-severity"
+                 " errors, 2: all errors including high-severity errors,"
+                 " 0: disables logging");
+
+module_param_named(debug, pmcraid_debug_log, uint, (S_IRUGO | S_IWUSR));
+MODULE_PARM_DESC(debug,
+                 "Enable driver verbose message logging. Set 1 to enable."
+                 "(default: 0)");
+
+module_param_named(disable_aen, pmcraid_disable_aen, uint, (S_IRUGO | S_IWUSR));
+MODULE_PARM_DESC(disable_aen,
+                 "Disable driver aen notifications to apps. Set 1 to disable."
+                 "(default: 0)");
+
+/* chip specific constants for PMC MaxRAID controllers (same for
+ * 0x5220 and 0x8010
+ */
+static struct pmcraid_chip_details pmcraid_chip_cfg[] = {
+        {
+         .ioastatus = 0x0,
+         .ioarrin = 0x00040,
+         .mailbox = 0x7FC30,
+         .global_intr_mask = 0x00034,
+         .ioa_host_intr = 0x0009C,
+         .ioa_host_intr_clr = 0x000A0,
+         .ioa_host_mask = 0x7FC28,
+         .ioa_host_mask_clr = 0x7FC28,
+         .host_ioa_intr = 0x00020,
+         .host_ioa_intr_clr = 0x00020,
+         .transop_timeout = 300
+         }
+};
+
+/*
+ * PCI device ids supported by pmcraid driver
+ */
+static struct pci_device_id pmcraid_pci_table[] __devinitdata = {
+        { PCI_DEVICE(PCI_VENDOR_ID_PMC, PCI_DEVICE_ID_PMC_MAXRAID),
+          0, 0, (kernel_ulong_t)&pmcraid_chip_cfg[0]
+        },
+        {}
+};
+
+MODULE_DEVICE_TABLE(pci, pmcraid_pci_table);
+
+
+
+/**
+ * pmcraid_slave_alloc - Prepare for commands to a device
+ * @scsi_dev: scsi device struct
+ *
+ * This function is called by mid-layer prior to sending any command to the new
+ * device. Stores resource entry details of the device in scsi_device struct.
+ * Queuecommand uses the resource handle and other details to fill up IOARCB
+ * while sending commands to the device.
+ *
+ * Return value:
+ *        0 on success / -ENXIO if device does not exist
+ */
+static int pmcraid_slave_alloc(struct scsi_device *scsi_dev)
+{
+        struct pmcraid_resource_entry *temp, *res = NULL;
+        struct pmcraid_instance *pinstance;
+        u8 target, bus, lun;
+        unsigned long lock_flags;
+        int rc = -ENXIO;
+        pinstance = shost_priv(scsi_dev->host);
+
+        /* Driver exposes VSET and GSCSI resources only; all other device types
+         * are not exposed. Resource list is synchronized using resource lock
+         * so any traversal or modifications to the list should be done inside
+         * this lock
+         */
+        spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
+        list_for_each_entry(temp, &pinstance->used_res_q, queue) {
+
+                /* do not expose VSETs with order-ids >= 240 */
+                if (RES_IS_VSET(temp->cfg_entry)) {
+                        target = temp->cfg_entry.unique_flags1;
+                        if (target >= PMCRAID_MAX_VSET_TARGETS)
+                                continue;
+                        bus = PMCRAID_VSET_BUS_ID;
+                        lun = 0;
+                } else if (RES_IS_GSCSI(temp->cfg_entry)) {
+                        target = RES_TARGET(temp->cfg_entry.resource_address);
+                        bus = PMCRAID_PHYS_BUS_ID;
+                        lun = RES_LUN(temp->cfg_entry.resource_address);
+                } else {
+                        continue;
+                }
+
+                if (bus == scsi_dev->channel &&
+                    target == scsi_dev->id &&
+                    lun == scsi_dev->lun) {
+                        res = temp;
+                        break;
+                }
+        }
+
+        if (res) {
+                res->scsi_dev = scsi_dev;
+                scsi_dev->hostdata = res;
+                res->change_detected = 0;
+                atomic_set(&res->read_failures, 0);
+                atomic_set(&res->write_failures, 0);
+                rc = 0;
+        }
+        spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
+        return rc;
+}
+
+/**
+ * pmcraid_slave_configure - Configures a SCSI device
+ * @scsi_dev: scsi device struct
+ *
+ * This fucntion is executed by SCSI mid layer just after a device is first
+ * scanned (i.e. it has responded to an INQUIRY). For VSET resources, the
+ * timeout value (default 30s) will be over-written to a higher value (60s)
+ * and max_sectors value will be over-written to 512. It also sets queue depth
+ * to host->cmd_per_lun value
+ *
+ * Return value:
+ *        0 on success
+ */
+static int pmcraid_slave_configure(struct scsi_device *scsi_dev)
+{
+        struct pmcraid_resource_entry *res = scsi_dev->hostdata;
+
+        if (!res)
+                return 0;
+
+        /* LLD exposes VSETs and Enclosure devices only */
+        if (RES_IS_GSCSI(res->cfg_entry) &&
+            scsi_dev->type != TYPE_ENCLOSURE)
+                return -ENXIO;
+
+        pmcraid_info("configuring %x:%x:%x:%x\n",
+                     scsi_dev->host->unique_id,
+                     scsi_dev->channel,
+                     scsi_dev->id,
+                     scsi_dev->lun);
+
+        if (RES_IS_GSCSI(res->cfg_entry)) {
+                scsi_dev->allow_restart = 1;
+        } else if (RES_IS_VSET(res->cfg_entry)) {
+                scsi_dev->allow_restart = 1;
+                blk_queue_rq_timeout(scsi_dev->request_queue,
+                                     PMCRAID_VSET_IO_TIMEOUT);
+                blk_queue_max_sectors(scsi_dev->request_queue,
+                                      PMCRAID_VSET_MAX_SECTORS);
+        }
+
+        if (scsi_dev->tagged_supported &&
+            (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
+                scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
+                scsi_adjust_queue_depth(scsi_dev, MSG_SIMPLE_TAG,
+                                        scsi_dev->host->cmd_per_lun);
+        } else {
+                scsi_adjust_queue_depth(scsi_dev, 0,
+                                        scsi_dev->host->cmd_per_lun);
+        }
+
+        return 0;
+}
+
+/**
+ * pmcraid_slave_destroy - Unconfigure a SCSI device before removing it
+ *
+ * @scsi_dev: scsi device struct
+ *
+ * This is called by mid-layer before removing a device. Pointer assignments
+ * done in pmcraid_slave_alloc will be reset to NULL here.
+ *
+ * Return value
+ *   none
+ */
+static void pmcraid_slave_destroy(struct scsi_device *scsi_dev)
+{
+        struct pmcraid_resource_entry *res;
+
+        res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
+
+        if (res)
+                res->scsi_dev = NULL;
+
+        scsi_dev->hostdata = NULL;
+}
+
+/**
+ * pmcraid_change_queue_depth - Change the device's queue depth
+ * @scsi_dev: scsi device struct
+ * @depth: depth to set
+ *
+ * Return value
+ *      actual depth set
+ */
+static int pmcraid_change_queue_depth(struct scsi_device *scsi_dev, int depth)
+{
+        if (depth > PMCRAID_MAX_CMD_PER_LUN)
+                depth = PMCRAID_MAX_CMD_PER_LUN;
+
+        scsi_adjust_queue_depth(scsi_dev, scsi_get_tag_type(scsi_dev), depth);
+
+        return scsi_dev->queue_depth;
+}
+
+/**
+ * pmcraid_change_queue_type - Change the device's queue type
+ * @scsi_dev: scsi device struct
+ * @tag: type of tags to use
+ *
+ * Return value:
+ *      actual queue type set
+ */
+static int pmcraid_change_queue_type(struct scsi_device *scsi_dev, int tag)
+{
+        struct pmcraid_resource_entry *res;
+
+        res = (struct pmcraid_resource_entry *)scsi_dev->hostdata;
+
+        if ((res) && scsi_dev->tagged_supported &&
+            (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry))) {
+                scsi_set_tag_type(scsi_dev, tag);
+
+                if (tag)
+                        scsi_activate_tcq(scsi_dev, scsi_dev->queue_depth);
+                else
+                        scsi_deactivate_tcq(scsi_dev, scsi_dev->queue_depth);
+        } else
+                tag = 0;
+
+        return tag;
+}
+
+
+/**
+ * pmcraid_init_cmdblk - initializes a command block
+ *
+ * @cmd: pointer to struct pmcraid_cmd to be initialized
+ * @index: if >=0 first time initialization; otherwise reinitialization
+ *
+ * Return Value
+ *       None
+ */
+void pmcraid_init_cmdblk(struct pmcraid_cmd *cmd, int index)
+{
+        struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
+        dma_addr_t dma_addr = cmd->ioa_cb_bus_addr;
+
+        if (index >= 0) {
+                /* first time initialization (called from  probe) */
+                u32 ioasa_offset =
+                        offsetof(struct pmcraid_control_block, ioasa);
+
+                cmd->index = index;
+                ioarcb->response_handle = cpu_to_le32(index << 2);
+                ioarcb->ioarcb_bus_addr = cpu_to_le64(dma_addr);
+                ioarcb->ioasa_bus_addr = cpu_to_le64(dma_addr + ioasa_offset);
+                ioarcb->ioasa_len = cpu_to_le16(sizeof(struct pmcraid_ioasa));
+        } else {
+                /* re-initialization of various lengths, called once command is
+                 * processed by IOA
+                 */
+                memset(&cmd->ioa_cb->ioarcb.cdb, 0, PMCRAID_MAX_CDB_LEN);
+                ioarcb->request_flags0 = 0;
+                ioarcb->request_flags1 = 0;
+                ioarcb->cmd_timeout = 0;
+                ioarcb->ioarcb_bus_addr &= (~0x1FULL);
+                ioarcb->ioadl_bus_addr = 0;
+                ioarcb->ioadl_length = 0;
+                ioarcb->data_transfer_length = 0;
+                ioarcb->add_cmd_param_length = 0;
+                ioarcb->add_cmd_param_offset = 0;
+                cmd->ioa_cb->ioasa.ioasc = 0;
+                cmd->ioa_cb->ioasa.residual_data_length = 0;
+                cmd->u.time_left = 0;
+        }
+
+        cmd->cmd_done = NULL;
+        cmd->scsi_cmd = NULL;
+        cmd->release = 0;
+        cmd->completion_req = 0;
+        cmd->dma_handle = 0;
+        init_timer(&cmd->timer);
+}
+
+/**
+ * pmcraid_reinit_cmdblk - reinitialize a command block
+ *
+ * @cmd: pointer to struct pmcraid_cmd to be reinitialized
+ *
+ * Return Value
+ *       None
+ */
+static void pmcraid_reinit_cmdblk(struct pmcraid_cmd *cmd)
+{
+        pmcraid_init_cmdblk(cmd, -1);
+}
+
+/**
+ * pmcraid_get_free_cmd - get a free cmd block from command block pool
+ * @pinstance: adapter instance structure
+ *
+ * Return Value:
+ *      returns pointer to cmd block or NULL if no blocks are available
+ */
+static struct pmcraid_cmd *pmcraid_get_free_cmd(
+        struct pmcraid_instance *pinstance
+)
+{
+        struct pmcraid_cmd *cmd = NULL;
+        unsigned long lock_flags;
+
+        /* free cmd block list is protected by free_pool_lock */
+        spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
+
+        if (!list_empty(&pinstance->free_cmd_pool)) {
+                cmd = list_entry(pinstance->free_cmd_pool.next,
+                                 struct pmcraid_cmd, free_list);
+                list_del(&cmd->free_list);
+        }
+        spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
+
+        /* Initialize the command block before giving it the caller */
+        if (cmd != NULL)
+                pmcraid_reinit_cmdblk(cmd);
+        return cmd;
+}
+
+/**
+ * pmcraid_return_cmd - return a completed command block back into free pool
+ * @cmd: pointer to the command block
+ *
+ * Return Value:
+ *      nothing
+ */
+void pmcraid_return_cmd(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        unsigned long lock_flags;
+
+        spin_lock_irqsave(&pinstance->free_pool_lock, lock_flags);
+        list_add_tail(&cmd->free_list, &pinstance->free_cmd_pool);
+        spin_unlock_irqrestore(&pinstance->free_pool_lock, lock_flags);
+}
+
+/**
+ * pmcraid_read_interrupts -  reads IOA interrupts
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return value
+ *       interrupts read from IOA
+ */
+static u32 pmcraid_read_interrupts(struct pmcraid_instance *pinstance)
+{
+        return ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
+}
+
+/**
+ * pmcraid_disable_interrupts - Masks and clears all specified interrupts
+ *
+ * @pinstance: pointer to per adapter instance structure
+ * @intrs: interrupts to disable
+ *
+ * Return Value
+ *       None
+ */
+static void pmcraid_disable_interrupts(
+        struct pmcraid_instance *pinstance,
+        u32 intrs
+)
+{
+        u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
+        u32 nmask = gmask | GLOBAL_INTERRUPT_MASK;
+
+        iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
+        iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_clr_reg);
+        iowrite32(intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg);
+        ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
+}
+
+/**
+ * pmcraid_enable_interrupts - Enables specified interrupts
+ *
+ * @pinstance: pointer to per adapter instance structure
+ * @intr: interrupts to enable
+ *
+ * Return Value
+ *       None
+ */
+static void pmcraid_enable_interrupts(
+        struct pmcraid_instance *pinstance,
+        u32 intrs
+)
+{
+        u32 gmask = ioread32(pinstance->int_regs.global_interrupt_mask_reg);
+        u32 nmask = gmask & (~GLOBAL_INTERRUPT_MASK);
+
+        iowrite32(nmask, pinstance->int_regs.global_interrupt_mask_reg);
+        iowrite32(~intrs, pinstance->int_regs.ioa_host_interrupt_mask_reg);
+        ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
+
+        pmcraid_info("enabled interrupts global mask = %x intr_mask = %x\n",
+                ioread32(pinstance->int_regs.global_interrupt_mask_reg),
+                ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg));
+}
+
+/**
+ * pmcraid_reset_type - Determine the required reset type
+ * @pinstance: pointer to adapter instance structure
+ *
+ * IOA requires hard reset if any of the following conditions is true.
+ * 1. If HRRQ valid interrupt is not masked
+ * 2. IOA reset alert doorbell is set
+ * 3. If there are any error interrupts
+ */
+static void pmcraid_reset_type(struct pmcraid_instance *pinstance)
+{
+        u32 mask;
+        u32 intrs;
+        u32 alerts;
+
+        mask = ioread32(pinstance->int_regs.ioa_host_interrupt_mask_reg);
+        intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
+        alerts = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
+
+        if ((mask & INTRS_HRRQ_VALID) == 0 ||
+            (alerts & DOORBELL_IOA_RESET_ALERT) ||
+            (intrs & PMCRAID_ERROR_INTERRUPTS)) {
+                pmcraid_info("IOA requires hard reset\n");
+                pinstance->ioa_hard_reset = 1;
+        }
+
+        /* If unit check is active, trigger the dump */
+        if (intrs & INTRS_IOA_UNIT_CHECK)
+                pinstance->ioa_unit_check = 1;
+}
+
+/**
+ * pmcraid_bist_done - completion function for PCI BIST
+ * @cmd: pointer to reset command
+ * Return Value
+ *      none
+ */
+
+static void pmcraid_ioa_reset(struct pmcraid_cmd *);
+
+static void pmcraid_bist_done(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        unsigned long lock_flags;
+        int rc;
+        u16 pci_reg;
+
+        rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
+
+        /* If PCI config space can't be accessed wait for another two secs */
+        if ((rc != PCIBIOS_SUCCESSFUL || (!(pci_reg & PCI_COMMAND_MEMORY))) &&
+            cmd->u.time_left > 0) {
+                pmcraid_info("BIST not complete, waiting another 2 secs\n");
+                cmd->timer.expires = jiffies + cmd->u.time_left;
+                cmd->u.time_left = 0;
+                cmd->timer.data = (unsigned long)cmd;
+                cmd->timer.function =
+                        (void (*)(unsigned long))pmcraid_bist_done;
+                add_timer(&cmd->timer);
+        } else {
+                cmd->u.time_left = 0;
+                pmcraid_info("BIST is complete, proceeding with reset\n");
+                spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+                pmcraid_ioa_reset(cmd);
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+        }
+}
+
+/**
+ * pmcraid_start_bist - starts BIST
+ * @cmd: pointer to reset cmd
+ * Return Value
+ *   none
+ */
+static void pmcraid_start_bist(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u32 doorbells, intrs;
+
+        /* proceed with bist and wait for 2 seconds */
+        iowrite32(DOORBELL_IOA_START_BIST,
+                pinstance->int_regs.host_ioa_interrupt_reg);
+        doorbells = ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
+        intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
+        pmcraid_info("doorbells after start bist: %x intrs: %x \n",
+                      doorbells, intrs);
+
+        cmd->u.time_left = msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
+        cmd->timer.data = (unsigned long)cmd;
+        cmd->timer.expires = jiffies + msecs_to_jiffies(PMCRAID_BIST_TIMEOUT);
+        cmd->timer.function = (void (*)(unsigned long))pmcraid_bist_done;
+        add_timer(&cmd->timer);
+}
+
+/**
+ * pmcraid_reset_alert_done - completion routine for reset_alert
+ * @cmd: pointer to command block used in reset sequence
+ * Return value
+ *  None
+ */
+static void pmcraid_reset_alert_done(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u32 status = ioread32(pinstance->ioa_status);
+        unsigned long lock_flags;
+
+        /* if the critical operation in progress bit is set or the wait times
+         * out, invoke reset engine to proceed with hard reset. If there is
+         * some more time to wait, restart the timer
+         */
+        if (((status & INTRS_CRITICAL_OP_IN_PROGRESS) == 0) ||
+            cmd->u.time_left <= 0) {
+                pmcraid_info("critical op is reset proceeding with reset\n");
+                spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+                pmcraid_ioa_reset(cmd);
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+        } else {
+                pmcraid_info("critical op is not yet reset waiting again\n");
+                /* restart timer if some more time is available to wait */
+                cmd->u.time_left -= PMCRAID_CHECK_FOR_RESET_TIMEOUT;
+                cmd->timer.data = (unsigned long)cmd;
+                cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
+                cmd->timer.function =
+                        (void (*)(unsigned long))pmcraid_reset_alert_done;
+                add_timer(&cmd->timer);
+        }
+}
+
+/**
+ * pmcraid_reset_alert - alerts IOA for a possible reset
+ * @cmd : command block to be used for reset sequence.
+ *
+ * Return Value
+ *      returns 0 if pci config-space is accessible and RESET_DOORBELL is
+ *      successfully written to IOA. Returns non-zero in case pci_config_space
+ *      is not accessible
+ */
+static void pmcraid_reset_alert(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u32 doorbells;
+        int rc;
+        u16 pci_reg;
+
+        /* If we are able to access IOA PCI config space, alert IOA that we are
+         * going to reset it soon. This enables IOA to preserv persistent error
+         * data if any. In case memory space is not accessible, proceed with
+         * BIST or slot_reset
+         */
+        rc = pci_read_config_word(pinstance->pdev, PCI_COMMAND, &pci_reg);
+        if ((rc == PCIBIOS_SUCCESSFUL) && (pci_reg & PCI_COMMAND_MEMORY)) {
+
+                /* wait for IOA permission i.e until CRITICAL_OPERATION bit is
+                 * reset IOA doesn't generate any interrupts when CRITICAL
+                 * OPERATION bit is reset. A timer is started to wait for this
+                 * bit to be reset.
+                 */
+                cmd->u.time_left = PMCRAID_RESET_TIMEOUT;
+                cmd->timer.data = (unsigned long)cmd;
+                cmd->timer.expires = jiffies + PMCRAID_CHECK_FOR_RESET_TIMEOUT;
+                cmd->timer.function =
+                        (void (*)(unsigned long))pmcraid_reset_alert_done;
+                add_timer(&cmd->timer);
+
+                iowrite32(DOORBELL_IOA_RESET_ALERT,
+                        pinstance->int_regs.host_ioa_interrupt_reg);
+                doorbells =
+                        ioread32(pinstance->int_regs.host_ioa_interrupt_reg);
+                pmcraid_info("doorbells after reset alert: %x\n", doorbells);
+        } else {
+                pmcraid_info("PCI config is not accessible starting BIST\n");
+                pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
+                pmcraid_start_bist(cmd);
+        }
+}
+
+/**
+ * pmcraid_timeout_handler -  Timeout handler for internally generated ops
+ *
+ * @cmd : pointer to command structure, that got timedout
+ *
+ * This function blocks host requests and initiates an adapter reset.
+ *
+ * Return value:
+ *   None
+ */
+static void pmcraid_timeout_handler(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        unsigned long lock_flags;
+
+        dev_err(&pinstance->pdev->dev,
+                "Adapter being reset due to command timeout.\n");
+
+        /* Command timeouts result in hard reset sequence. The command that got
+         * timed out may be the one used as part of reset sequence. In this
+         * case restart reset sequence using the same command block even if
+         * reset is in progress. Otherwise fail this command and get a free
+         * command block to restart the reset sequence.
+         */
+        spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+        if (!pinstance->ioa_reset_in_progress) {
+                pinstance->ioa_reset_attempts = 0;
+                cmd = pmcraid_get_free_cmd(pinstance);
+
+                /* If we are out of command blocks, just return here itself.
+                 * Some other command's timeout handler can do the reset job
+                 */
+                if (cmd == NULL) {
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               lock_flags);
+                        pmcraid_err("no free cmnd block for timeout handler\n");
+                        return;
+                }
+
+                pinstance->reset_cmd = cmd;
+                pinstance->ioa_reset_in_progress = 1;
+        } else {
+                pmcraid_info("reset is already in progress\n");
+
+                if (pinstance->reset_cmd != cmd) {
+                        /* This command should have been given to IOA, this
+                         * command will be completed by fail_outstanding_cmds
+                         * anyway
+                         */
+                        pmcraid_err("cmd is pending but reset in progress\n");
+                }
+
+                /* If this command was being used as part of the reset
+                 * sequence, set cmd_done pointer to pmcraid_ioa_reset. This
+                 * causes fail_outstanding_commands not to return the command
+                 * block back to free pool
+                 */
+                if (cmd == pinstance->reset_cmd)
+                        cmd->cmd_done = pmcraid_ioa_reset;
+
+        }
+
+        pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
+        scsi_block_requests(pinstance->host);
+        pmcraid_reset_alert(cmd);
+        spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+}
+
+/**
+ * pmcraid_internal_done - completion routine for internally generated cmds
+ *
+ * @cmd: command that got response from IOA
+ *
+ * Return Value:
+ *       none
+ */
+static void pmcraid_internal_done(struct pmcraid_cmd *cmd)
+{
+        pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
+                     cmd->ioa_cb->ioarcb.cdb[0],
+                     le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
+
+        /* Some of the internal commands are sent with callers blocking for the
+         * response. Same will be indicated as part of cmd->completion_req
+         * field. Response path needs to wake up any waiters waiting for cmd
+         * completion if this flag is set.
+         */
+        if (cmd->completion_req) {
+                cmd->completion_req = 0;
+                complete(&cmd->wait_for_completion);
+        }
+
+        /* most of the internal commands are completed by caller itself, so
+         * no need to return the command block back to free pool until we are
+         * required to do so (e.g once done with initialization).
+         */
+        if (cmd->release) {
+                cmd->release = 0;
+                pmcraid_return_cmd(cmd);
+        }
+}
+
+/**
+ * pmcraid_reinit_cfgtable_done - done function for cfg table reinitialization
+ *
+ * @cmd: command that got response from IOA
+ *
+ * This routine is called after driver re-reads configuration table due to a
+ * lost CCN. It returns the command block back to free pool and schedules
+ * worker thread to add/delete devices into the system.
+ *
+ * Return Value:
+ *       none
+ */
+static void pmcraid_reinit_cfgtable_done(struct pmcraid_cmd *cmd)
+{
+        pmcraid_info("response internal cmd CDB[0] = %x ioasc = %x\n",
+                     cmd->ioa_cb->ioarcb.cdb[0],
+                     le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
+
+        if (cmd->release) {
+                cmd->release = 0;
+                pmcraid_return_cmd(cmd);
+        }
+        pmcraid_info("scheduling worker for config table reinitialization\n");
+        schedule_work(&cmd->drv_inst->worker_q);
+}
+
+/**
+ * pmcraid_erp_done - Process completion of SCSI error response from device
+ * @cmd: pmcraid_command
+ *
+ * This function copies the sense buffer into the scsi_cmd struct and completes
+ * scsi_cmd by calling scsi_done function.
+ *
+ * Return value:
+ *  none
+ */
+static void pmcraid_erp_done(struct pmcraid_cmd *cmd)
+{
+        struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
+
+        if (PMCRAID_IOASC_SENSE_KEY(ioasc) > 0) {
+                scsi_cmd->result |= (DID_ERROR << 16);
+                pmcraid_err("command CDB[0] = %x failed with IOASC: 0x%08X\n",
+                             cmd->ioa_cb->ioarcb.cdb[0], ioasc);
+        }
+
+        /* if we had allocated sense buffers for request sense, copy the sense
+         * release the buffers
+         */
+        if (cmd->sense_buffer != NULL) {
+                memcpy(scsi_cmd->sense_buffer,
+                       cmd->sense_buffer,
+                       SCSI_SENSE_BUFFERSIZE);
+                pci_free_consistent(pinstance->pdev,
+                                    SCSI_SENSE_BUFFERSIZE,
+                                    cmd->sense_buffer, cmd->sense_buffer_dma);
+                cmd->sense_buffer = NULL;
+                cmd->sense_buffer_dma = 0;
+        }
+
+        scsi_dma_unmap(scsi_cmd);
+        pmcraid_return_cmd(cmd);
+        scsi_cmd->scsi_done(scsi_cmd);
+}
+
+/**
+ * pmcraid_fire_command - sends an IOA command to adapter
+ *
+ * This function adds the given block into pending command list
+ * and returns without waiting
+ *
+ * @cmd : command to be sent to the device
+ *
+ * Return Value
+ *      None
+ */
+static void _pmcraid_fire_command(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        unsigned long lock_flags;
+
+        /* Add this command block to pending cmd pool. We do this prior to
+         * writting IOARCB to ioarrin because IOA might complete the command
+         * by the time we are about to add it to the list. Response handler
+         * (isr/tasklet) looks for cmb block in the pending pending list.
+         */
+        spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
+        list_add_tail(&cmd->free_list, &pinstance->pending_cmd_pool);
+        spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
+        atomic_inc(&pinstance->outstanding_cmds);
+
+        /* driver writes lower 32-bit value of IOARCB address only */
+        mb();
+        iowrite32(le32_to_cpu(cmd->ioa_cb->ioarcb.ioarcb_bus_addr),
+                  pinstance->ioarrin);
+}
+
+/**
+ * pmcraid_send_cmd - fires a command to IOA
+ *
+ * This function also sets up timeout function, and command completion
+ * function
+ *
+ * @cmd: pointer to the command block to be fired to IOA
+ * @cmd_done: command completion function, called once IOA responds
+ * @timeout: timeout to wait for this command completion
+ * @timeout_func: timeout handler
+ *
+ * Return value
+ *   none
+ */
+static void pmcraid_send_cmd(
+        struct pmcraid_cmd *cmd,
+        void (*cmd_done) (struct pmcraid_cmd *),
+        unsigned long timeout,
+        void (*timeout_func) (struct pmcraid_cmd *)
+)
+{
+        /* initialize done function */
+        cmd->cmd_done = cmd_done;
+
+        if (timeout_func) {
+                /* setup timeout handler */
+                cmd->timer.data = (unsigned long)cmd;
+                cmd->timer.expires = jiffies + timeout;
+                cmd->timer.function = (void (*)(unsigned long))timeout_func;
+                add_timer(&cmd->timer);
+        }
+
+        /* fire the command to IOA */
+        _pmcraid_fire_command(cmd);
+}
+
+/**
+ * pmcraid_ioa_shutdown - sends SHUTDOWN command to ioa
+ *
+ * @cmd: pointer to the command block used as part of reset sequence
+ *
+ * Return Value
+ *  None
+ */
+static void pmcraid_ioa_shutdown(struct pmcraid_cmd *cmd)
+{
+        pmcraid_info("response for Cancel CCN CDB[0] = %x ioasc = %x\n",
+                     cmd->ioa_cb->ioarcb.cdb[0],
+                     le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
+
+        /* Note that commands sent during reset require next command to be sent
+         * to IOA. Hence reinit the done function as well as timeout function
+         */
+        pmcraid_reinit_cmdblk(cmd);
+        cmd->ioa_cb->ioarcb.request_type = REQ_TYPE_IOACMD;
+        cmd->ioa_cb->ioarcb.resource_handle =
+                cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
+        cmd->ioa_cb->ioarcb.cdb[0] = PMCRAID_IOA_SHUTDOWN;
+        cmd->ioa_cb->ioarcb.cdb[1] = PMCRAID_SHUTDOWN_NORMAL;
+
+        /* fire shutdown command to hardware. */
+        pmcraid_info("firing normal shutdown command (%d) to IOA\n",
+                     le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle));
+
+        pmcraid_send_cmd(cmd, pmcraid_ioa_reset,
+                         PMCRAID_SHUTDOWN_TIMEOUT,
+                         pmcraid_timeout_handler);
+}
+
+/**
+ * pmcraid_identify_hrrq - registers host rrq buffers with IOA
+ * @cmd: pointer to command block to be used for identify hrrq
+ *
+ * Return Value
+ *       0 in case of success, otherwise non-zero failure code
+ */
+
+static void pmcraid_querycfg(struct pmcraid_cmd *);
+
+static void pmcraid_identify_hrrq(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        int index = 0;
+        __be64 hrrq_addr = cpu_to_be64(pinstance->hrrq_start_bus_addr[index]);
+        u32 hrrq_size = cpu_to_be32(sizeof(u32) * PMCRAID_MAX_CMD);
+
+        pmcraid_reinit_cmdblk(cmd);
+
+        /* Initialize ioarcb */
+        ioarcb->request_type = REQ_TYPE_IOACMD;
+        ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
+
+        /* initialize the hrrq number where IOA will respond to this command */
+        ioarcb->hrrq_id = index;
+        ioarcb->cdb[0] = PMCRAID_IDENTIFY_HRRQ;
+        ioarcb->cdb[1] = index;
+
+        /* IOA expects 64-bit pci address to be written in B.E format
+         * (i.e cdb[2]=MSByte..cdb[9]=LSB.
+         */
+        pmcraid_info("HRRQ_IDENTIFY with hrrq:ioarcb => %llx:%llx\n",
+                     hrrq_addr, ioarcb->ioarcb_bus_addr);
+
+        memcpy(&(ioarcb->cdb[2]), &hrrq_addr, sizeof(hrrq_addr));
+        memcpy(&(ioarcb->cdb[10]), &hrrq_size, sizeof(hrrq_size));
+
+        /* Subsequent commands require HRRQ identification to be successful.
+         * Note that this gets called even during reset from SCSI mid-layer
+         * or tasklet
+         */
+        pmcraid_send_cmd(cmd, pmcraid_querycfg,
+                         PMCRAID_INTERNAL_TIMEOUT,
+                         pmcraid_timeout_handler);
+}
+
+static void pmcraid_process_ccn(struct pmcraid_cmd *cmd);
+static void pmcraid_process_ldn(struct pmcraid_cmd *cmd);
+
+/**
+ * pmcraid_send_hcam_cmd - send an initialized command block(HCAM) to IOA
+ *
+ * @cmd: initialized command block pointer
+ *
+ * Return Value
+ *   none
+ */
+static void pmcraid_send_hcam_cmd(struct pmcraid_cmd *cmd)
+{
+        if (cmd->ioa_cb->ioarcb.cdb[1] == PMCRAID_HCAM_CODE_CONFIG_CHANGE)
+                atomic_set(&(cmd->drv_inst->ccn.ignore), 0);
+        else
+                atomic_set(&(cmd->drv_inst->ldn.ignore), 0);
+
+        pmcraid_send_cmd(cmd, cmd->cmd_done, 0, NULL);
+}
+
+/**
+ * pmcraid_init_hcam - send an initialized command block(HCAM) to IOA
+ *
+ * @pinstance: pointer to adapter instance structure
+ * @type: HCAM type
+ *
+ * Return Value
+ *   pointer to initialized pmcraid_cmd structure or NULL
+ */
+static struct pmcraid_cmd *pmcraid_init_hcam
+(
+        struct pmcraid_instance *pinstance,
+        u8 type
+)
+{
+        struct pmcraid_cmd *cmd;
+        struct pmcraid_ioarcb *ioarcb;
+        struct pmcraid_ioadl_desc *ioadl;
+        struct pmcraid_hostrcb *hcam;
+        void (*cmd_done) (struct pmcraid_cmd *);
+        dma_addr_t dma;
+        int rcb_size;
+
+        cmd = pmcraid_get_free_cmd(pinstance);
+
+        if (!cmd) {
+                pmcraid_err("no free command blocks for hcam\n");
+                return cmd;
+        }
+
+        if (type == PMCRAID_HCAM_CODE_CONFIG_CHANGE) {
+                rcb_size = sizeof(struct pmcraid_hcam_ccn);
+                cmd_done = pmcraid_process_ccn;
+                dma = pinstance->ccn.baddr + PMCRAID_AEN_HDR_SIZE;
+                hcam = &pinstance->ccn;
+        } else {
+                rcb_size = sizeof(struct pmcraid_hcam_ldn);
+                cmd_done = pmcraid_process_ldn;
+                dma = pinstance->ldn.baddr + PMCRAID_AEN_HDR_SIZE;
+                hcam = &pinstance->ldn;
+        }
+
+        /* initialize command pointer used for HCAM registration */
+        hcam->cmd = cmd;
+
+        ioarcb = &cmd->ioa_cb->ioarcb;
+        ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
+                                        offsetof(struct pmcraid_ioarcb,
+                                                add_data.u.ioadl[0]));
+        ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
+        ioadl = ioarcb->add_data.u.ioadl;
+
+        /* Initialize ioarcb */
+        ioarcb->request_type = REQ_TYPE_HCAM;
+        ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
+        ioarcb->cdb[0] = PMCRAID_HOST_CONTROLLED_ASYNC;
+        ioarcb->cdb[1] = type;
+        ioarcb->cdb[7] = (rcb_size >> 8) & 0xFF;
+        ioarcb->cdb[8] = (rcb_size) & 0xFF;
+
+        ioarcb->data_transfer_length = cpu_to_le32(rcb_size);
+
+        ioadl[0].flags |= cpu_to_le32(IOADL_FLAGS_READ_LAST);
+        ioadl[0].data_len = cpu_to_le32(rcb_size);
+        ioadl[0].address = cpu_to_le32(dma);
+
+        cmd->cmd_done = cmd_done;
+        return cmd;
+}
+
+/**
+ * pmcraid_send_hcam - Send an HCAM to IOA
+ * @pinstance: ioa config struct
+ * @type: HCAM type
+ *
+ * This function will send a Host Controlled Async command to IOA.
+ *
+ * Return value:
+ *      none
+ */
+static void pmcraid_send_hcam(struct pmcraid_instance *pinstance, u8 type)
+{
+        struct pmcraid_cmd *cmd = pmcraid_init_hcam(pinstance, type);
+        pmcraid_send_hcam_cmd(cmd);
+}
+
+
+/**
+ * pmcraid_prepare_cancel_cmd - prepares a command block to abort another
+ *
+ * @cmd: pointer to cmd that is used as cancelling command
+ * @cmd_to_cancel: pointer to the command that needs to be cancelled
+ */
+static void pmcraid_prepare_cancel_cmd(
+        struct pmcraid_cmd *cmd,
+        struct pmcraid_cmd *cmd_to_cancel
+)
+{
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        __be64 ioarcb_addr = cmd_to_cancel->ioa_cb->ioarcb.ioarcb_bus_addr;
+
+        /* Get the resource handle to where the command to be aborted has been
+         * sent.
+         */
+        ioarcb->resource_handle = cmd_to_cancel->ioa_cb->ioarcb.resource_handle;
+        ioarcb->request_type = REQ_TYPE_IOACMD;
+        memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
+        ioarcb->cdb[0] = PMCRAID_ABORT_CMD;
+
+        /* IOARCB address of the command to be cancelled is given in
+         * cdb[2]..cdb[9] is Big-Endian format. Note that length bits in
+         * IOARCB address are not masked.
+         */
+        ioarcb_addr = cpu_to_be64(ioarcb_addr);
+        memcpy(&(ioarcb->cdb[2]), &ioarcb_addr, sizeof(ioarcb_addr));
+}
+
+/**
+ * pmcraid_cancel_hcam - sends ABORT task to abort a given HCAM
+ *
+ * @cmd: command to be used as cancelling command
+ * @type: HCAM type
+ * @cmd_done: op done function for the cancelling command
+ */
+static void pmcraid_cancel_hcam(
+        struct pmcraid_cmd *cmd,
+        u8 type,
+        void (*cmd_done) (struct pmcraid_cmd *)
+)
+{
+        struct pmcraid_instance *pinstance;
+        struct pmcraid_hostrcb  *hcam;
+
+        pinstance = cmd->drv_inst;
+        hcam =  (type == PMCRAID_HCAM_CODE_LOG_DATA) ?
+                &pinstance->ldn : &pinstance->ccn;
+
+        /* prepare for cancelling previous hcam command. If the HCAM is
+         * currently not pending with IOA, we would have hcam->cmd as non-null
+         */
+        if (hcam->cmd == NULL)
+                return;
+
+        pmcraid_prepare_cancel_cmd(cmd, hcam->cmd);
+
+        /* writing to IOARRIN must be protected by host_lock, as mid-layer
+         * schedule queuecommand while we are doing this
+         */
+        pmcraid_send_cmd(cmd, cmd_done,
+                         PMCRAID_INTERNAL_TIMEOUT,
+                         pmcraid_timeout_handler);
+}
+
+/**
+ * pmcraid_cancel_ccn - cancel CCN HCAM already registered with IOA
+ *
+ * @cmd: command block to be used for cancelling the HCAM
+ */
+static void pmcraid_cancel_ccn(struct pmcraid_cmd *cmd)
+{
+        pmcraid_info("response for Cancel LDN CDB[0] = %x ioasc = %x\n",
+                     cmd->ioa_cb->ioarcb.cdb[0],
+                     le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
+
+        pmcraid_reinit_cmdblk(cmd);
+
+        pmcraid_cancel_hcam(cmd,
+                            PMCRAID_HCAM_CODE_CONFIG_CHANGE,
+                            pmcraid_ioa_shutdown);
+}
+
+/**
+ * pmcraid_cancel_ldn - cancel LDN HCAM already registered with IOA
+ *
+ * @cmd: command block to be used for cancelling the HCAM
+ */
+static void pmcraid_cancel_ldn(struct pmcraid_cmd *cmd)
+{
+        pmcraid_cancel_hcam(cmd,
+                            PMCRAID_HCAM_CODE_LOG_DATA,
+                            pmcraid_cancel_ccn);
+}
+
+/**
+ * pmcraid_expose_resource - check if the resource can be exposed to OS
+ *
+ * @cfgte: pointer to configuration table entry of the resource
+ *
+ * Return value:
+ *      true if resource can be added to midlayer, false(0) otherwise
+ */
+static int pmcraid_expose_resource(struct pmcraid_config_table_entry *cfgte)
+{
+        int retval = 0;
+
+        if (cfgte->resource_type == RES_TYPE_VSET)
+                retval = ((cfgte->unique_flags1 & 0xFF) < 0xFE);
+        else if (cfgte->resource_type == RES_TYPE_GSCSI)
+                retval = (RES_BUS(cfgte->resource_address) !=
+                                PMCRAID_VIRTUAL_ENCL_BUS_ID);
+        return retval;
+}
+
+/* attributes supported by pmcraid_event_family */
+enum {
+        PMCRAID_AEN_ATTR_UNSPEC,
+        PMCRAID_AEN_ATTR_EVENT,
+        __PMCRAID_AEN_ATTR_MAX,
+};
+#define PMCRAID_AEN_ATTR_MAX (__PMCRAID_AEN_ATTR_MAX - 1)
+
+/* commands supported by pmcraid_event_family */
+enum {
+        PMCRAID_AEN_CMD_UNSPEC,
+        PMCRAID_AEN_CMD_EVENT,
+        __PMCRAID_AEN_CMD_MAX,
+};
+#define PMCRAID_AEN_CMD_MAX (__PMCRAID_AEN_CMD_MAX - 1)
+
+static struct genl_family pmcraid_event_family = {
+        .id = GENL_ID_GENERATE,
+        .name = "pmcraid",
+        .version = 1,
+        .maxattr = PMCRAID_AEN_ATTR_MAX
+};
+
+/**
+ * pmcraid_netlink_init - registers pmcraid_event_family
+ *
+ * Return value:
+ *      0 if the pmcraid_event_family is successfully registered
+ *      with netlink generic, non-zero otherwise
+ */
+static int pmcraid_netlink_init(void)
+{
+        int result;
+
+        result = genl_register_family(&pmcraid_event_family);
+
+        if (result)
+                return result;
+
+        pmcraid_info("registered NETLINK GENERIC group: %d\n",
+                     pmcraid_event_family.id);
+
+        return result;
+}
+
+/**
+ * pmcraid_netlink_release - unregisters pmcraid_event_family
+ *
+ * Return value:
+ *      none
+ */
+static void pmcraid_netlink_release(void)
+{
+        genl_unregister_family(&pmcraid_event_family);
+}
+
+/**
+ * pmcraid_notify_aen - sends event msg to user space application
+ * @pinstance: pointer to adapter instance structure
+ * @type: HCAM type
+ *
+ * Return value:
+ *      0 if success, error value in case of any failure.
+ */
+static int pmcraid_notify_aen(struct pmcraid_instance *pinstance, u8 type)
+{
+        struct sk_buff *skb;
+        struct pmcraid_aen_msg *aen_msg;
+        void *msg_header;
+        int data_size, total_size;
+        int result;
+
+
+        if (type == PMCRAID_HCAM_CODE_LOG_DATA) {
+                aen_msg = pinstance->ldn.msg;
+                data_size = pinstance->ldn.hcam->data_len;
+        } else {
+                aen_msg = pinstance->ccn.msg;
+                data_size = pinstance->ccn.hcam->data_len;
+        }
+
+        data_size += sizeof(struct pmcraid_hcam_hdr);
+        aen_msg->hostno = (pinstance->host->unique_id << 16 |
+                           MINOR(pinstance->cdev.dev));
+        aen_msg->length = data_size;
+        data_size += sizeof(*aen_msg);
+
+        total_size = nla_total_size(data_size);
+        skb = genlmsg_new(total_size, GFP_ATOMIC);
+
+
+        if (!skb) {
+                pmcraid_err("Failed to allocate aen data SKB of size: %x\n",
+                             total_size);
+                return -ENOMEM;
+        }
+
+        /* add the genetlink message header */
+        msg_header = genlmsg_put(skb, 0, 0,
+                                 &pmcraid_event_family, 0,
+                                 PMCRAID_AEN_CMD_EVENT);
+        if (!msg_header) {
+                pmcraid_err("failed to copy command details\n");
+                nlmsg_free(skb);
+                return -ENOMEM;
+        }
+
+        result = nla_put(skb, PMCRAID_AEN_ATTR_EVENT, data_size, aen_msg);
+
+        if (result) {
+                pmcraid_err("failed to copy AEN attribute data \n");
+                nlmsg_free(skb);
+                return -EINVAL;
+        }
+
+        /* send genetlink multicast message to notify appplications */
+        result = genlmsg_end(skb, msg_header);
+
+        if (result < 0) {
+                pmcraid_err("genlmsg_end failed\n");
+                nlmsg_free(skb);
+                return result;
+        }
+
+        result =
+                genlmsg_multicast(skb, 0, pmcraid_event_family.id, GFP_ATOMIC);
+
+        /* If there are no listeners, genlmsg_multicast may return non-zero
+         * value.
+         */
+        if (result)
+                pmcraid_info("failed to send %s event message %x!\n",
+                        type == PMCRAID_HCAM_CODE_LOG_DATA ? "LDN" : "CCN",
+                        result);
+        return result;
+}
+
+/**
+ * pmcraid_handle_config_change - Handle a config change from the adapter
+ * @pinstance: pointer to per adapter instance structure
+ *
+ * Return value:
+ *  none
+ */
+static void pmcraid_handle_config_change(struct pmcraid_instance *pinstance)
+{
+        struct pmcraid_config_table_entry *cfg_entry;
+        struct pmcraid_hcam_ccn *ccn_hcam;
+        struct pmcraid_cmd *cmd;
+        struct pmcraid_cmd *cfgcmd;
+        struct pmcraid_resource_entry *res = NULL;
+        u32 new_entry = 1;
+        unsigned long lock_flags;
+        unsigned long host_lock_flags;
+        int rc;
+
+        ccn_hcam = (struct pmcraid_hcam_ccn *)pinstance->ccn.hcam;
+        cfg_entry = &ccn_hcam->cfg_entry;
+
+        pmcraid_info
+                ("CCN(%x): %x type: %x lost: %x flags: %x res: %x:%x:%x:%x\n",
+                 pinstance->ccn.hcam->ilid,
+                 pinstance->ccn.hcam->op_code,
+                 pinstance->ccn.hcam->notification_type,
+                 pinstance->ccn.hcam->notification_lost,
+                 pinstance->ccn.hcam->flags,
+                 pinstance->host->unique_id,
+                 RES_IS_VSET(*cfg_entry) ? PMCRAID_VSET_BUS_ID :
+                 (RES_IS_GSCSI(*cfg_entry) ? PMCRAID_PHYS_BUS_ID :
+                        RES_BUS(cfg_entry->resource_address)),
+                 RES_IS_VSET(*cfg_entry) ? cfg_entry->unique_flags1 :
+                        RES_TARGET(cfg_entry->resource_address),
+                 RES_LUN(cfg_entry->resource_address));
+
+
+        /* If this HCAM indicates a lost notification, read the config table */
+        if (pinstance->ccn.hcam->notification_lost) {
+                cfgcmd = pmcraid_get_free_cmd(pinstance);
+                if (cfgcmd) {
+                        pmcraid_info("lost CCN, reading config table\b");
+                        pinstance->reinit_cfg_table = 1;
+                        pmcraid_querycfg(cfgcmd);
+                } else {
+                        pmcraid_err("lost CCN, no free cmd for querycfg\n");
+                }
+                goto out_notify_apps;
+        }
+
+        /* If this resource is not going to be added to mid-layer, just notify
+         * applications and return
+         */
+        if (!pmcraid_expose_resource(cfg_entry))
+                goto out_notify_apps;
+
+        spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
+        list_for_each_entry(res, &pinstance->used_res_q, queue) {
+                rc = memcmp(&res->cfg_entry.resource_address,
+                            &cfg_entry->resource_address,
+                            sizeof(cfg_entry->resource_address));
+                if (!rc) {
+                        new_entry = 0;
+                        break;
+                }
+        }
+
+        if (new_entry) {
+
+                /* If there are more number of resources than what driver can
+                 * manage, do not notify the applications about the CCN. Just
+                 * ignore this notifications and re-register the same HCAM
+                 */
+                if (list_empty(&pinstance->free_res_q)) {
+                        spin_unlock_irqrestore(&pinstance->resource_lock,
+                                                lock_flags);
+                        pmcraid_err("too many resources attached\n");
+                        spin_lock_irqsave(pinstance->host->host_lock,
+                                          host_lock_flags);
+                        pmcraid_send_hcam(pinstance,
+                                          PMCRAID_HCAM_CODE_CONFIG_CHANGE);
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               host_lock_flags);
+                        return;
+                }
+
+                res = list_entry(pinstance->free_res_q.next,
+                                 struct pmcraid_resource_entry, queue);
+
+                list_del(&res->queue);
+                res->scsi_dev = NULL;
+                res->reset_progress = 0;
+                list_add_tail(&res->queue, &pinstance->used_res_q);
+        }
+
+        memcpy(&res->cfg_entry, cfg_entry,
+                sizeof(struct pmcraid_config_table_entry));
+
+        if (pinstance->ccn.hcam->notification_type ==
+            NOTIFICATION_TYPE_ENTRY_DELETED) {
+                if (res->scsi_dev) {
+                        res->change_detected = RES_CHANGE_DEL;
+                        res->cfg_entry.resource_handle =
+                                PMCRAID_INVALID_RES_HANDLE;
+                        schedule_work(&pinstance->worker_q);
+                } else {
+                        /* This may be one of the non-exposed resources */
+                        list_move_tail(&res->queue, &pinstance->free_res_q);
+                }
+        } else if (!res->scsi_dev) {
+                res->change_detected = RES_CHANGE_ADD;
+                schedule_work(&pinstance->worker_q);
+        }
+        spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
+
+out_notify_apps:
+
+        /* Notify configuration changes to registered applications.*/
+        if (!pmcraid_disable_aen)
+                pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
+
+        cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
+        if (cmd)
+                pmcraid_send_hcam_cmd(cmd);
+}
+
+/**
+ * pmcraid_get_error_info - return error string for an ioasc
+ * @ioasc: ioasc code
+ * Return Value
+ *       none
+ */
+static struct pmcraid_ioasc_error *pmcraid_get_error_info(u32 ioasc)
+{
+        int i;
+        for (i = 0; i < ARRAY_SIZE(pmcraid_ioasc_error_table); i++) {
+                if (pmcraid_ioasc_error_table[i].ioasc_code == ioasc)
+                        return &pmcraid_ioasc_error_table[i];
+        }
+        return NULL;
+}
+
+/**
+ * pmcraid_ioasc_logger - log IOASC information based user-settings
+ * @ioasc: ioasc code
+ * @cmd: pointer to command that resulted in 'ioasc'
+ */
+void pmcraid_ioasc_logger(u32 ioasc, struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_ioasc_error *error_info = pmcraid_get_error_info(ioasc);
+
+        if (error_info == NULL ||
+                cmd->drv_inst->current_log_level < error_info->log_level)
+                return;
+
+        /* log the error string */
+        pmcraid_err("cmd [%d] for resource %x failed with %x(%s)\n",
+                cmd->ioa_cb->ioarcb.cdb[0],
+                cmd->ioa_cb->ioarcb.resource_handle,
+                le32_to_cpu(ioasc), error_info->error_string);
+}
+
+/**
+ * pmcraid_handle_error_log - Handle a config change (error log) from the IOA
+ *
+ * @pinstance: pointer to per adapter instance structure
+ *
+ * Return value:
+ *  none
+ */
+static void pmcraid_handle_error_log(struct pmcraid_instance *pinstance)
+{
+        struct pmcraid_hcam_ldn *hcam_ldn;
+        u32 ioasc;
+
+        hcam_ldn = (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
+
+        pmcraid_info
+                ("LDN(%x): %x type: %x lost: %x flags: %x overlay id: %x\n",
+                 pinstance->ldn.hcam->ilid,
+                 pinstance->ldn.hcam->op_code,
+                 pinstance->ldn.hcam->notification_type,
+                 pinstance->ldn.hcam->notification_lost,
+                 pinstance->ldn.hcam->flags,
+                 pinstance->ldn.hcam->overlay_id);
+
+        /* log only the errors, no need to log informational log entries */
+        if (pinstance->ldn.hcam->notification_type !=
+            NOTIFICATION_TYPE_ERROR_LOG)
+                return;
+
+        if (pinstance->ldn.hcam->notification_lost ==
+            HOSTRCB_NOTIFICATIONS_LOST)
+                dev_err(&pinstance->pdev->dev, "Error notifications lost\n");
+
+        ioasc = le32_to_cpu(hcam_ldn->error_log.fd_ioasc);
+
+        if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
+                ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER) {
+                dev_err(&pinstance->pdev->dev,
+                        "UnitAttention due to IOA Bus Reset\n");
+                scsi_report_bus_reset(
+                        pinstance->host,
+                        RES_BUS(hcam_ldn->error_log.fd_ra));
+        }
+
+        return;
+}
+
+/**
+ * pmcraid_process_ccn - Op done function for a CCN.
+ * @cmd: pointer to command struct
+ *
+ * This function is the op done function for a configuration
+ * change notification
+ *
+ * Return value:
+ * none
+ */
+static void pmcraid_process_ccn(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
+        unsigned long lock_flags;
+
+        pinstance->ccn.cmd = NULL;
+        pmcraid_return_cmd(cmd);
+
+        /* If driver initiated IOA reset happened while this hcam was pending
+         * with IOA, or IOA bringdown sequence is in progress, no need to
+         * re-register the hcam
+         */
+        if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
+            atomic_read(&pinstance->ccn.ignore) == 1) {
+                return;
+        } else if (ioasc) {
+                dev_err(&pinstance->pdev->dev,
+                        "Host RCB (CCN) failed with IOASC: 0x%08X\n", ioasc);
+                spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+                pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+        } else {
+                pmcraid_handle_config_change(pinstance);
+        }
+}
+
+/**
+ * pmcraid_process_ldn - op done function for an LDN
+ * @cmd: pointer to command block
+ *
+ * Return value
+ *   none
+ */
+static void pmcraid_initiate_reset(struct pmcraid_instance *);
+
+static void pmcraid_process_ldn(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        struct pmcraid_hcam_ldn *ldn_hcam =
+                        (struct pmcraid_hcam_ldn *)pinstance->ldn.hcam;
+        u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
+        u32 fd_ioasc = le32_to_cpu(ldn_hcam->error_log.fd_ioasc);
+        unsigned long lock_flags;
+
+        /* return the command block back to freepool */
+        pinstance->ldn.cmd = NULL;
+        pmcraid_return_cmd(cmd);
+
+        /* If driver initiated IOA reset happened while this hcam was pending
+         * with IOA, no need to re-register the hcam as reset engine will do it
+         * once reset sequence is complete
+         */
+        if (ioasc == PMCRAID_IOASC_IOA_WAS_RESET ||
+            atomic_read(&pinstance->ccn.ignore) == 1) {
+                return;
+        } else if (!ioasc) {
+                pmcraid_handle_error_log(pinstance);
+                if (fd_ioasc == PMCRAID_IOASC_NR_IOA_RESET_REQUIRED) {
+                        spin_lock_irqsave(pinstance->host->host_lock,
+                                          lock_flags);
+                        pmcraid_initiate_reset(pinstance);
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               lock_flags);
+                        return;
+                }
+        } else {
+                dev_err(&pinstance->pdev->dev,
+                        "Host RCB(LDN) failed with IOASC: 0x%08X\n", ioasc);
+        }
+        /* send netlink message for HCAM notification if enabled */
+        if (!pmcraid_disable_aen)
+                pmcraid_notify_aen(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
+
+        cmd = pmcraid_init_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
+        if (cmd)
+                pmcraid_send_hcam_cmd(cmd);
+}
+
+/**
+ * pmcraid_register_hcams - register HCAMs for CCN and LDN
+ *
+ * @pinstance: pointer per adapter instance structure
+ *
+ * Return Value
+ *   none
+ */
+static void pmcraid_register_hcams(struct pmcraid_instance *pinstance)
+{
+        pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_CONFIG_CHANGE);
+        pmcraid_send_hcam(pinstance, PMCRAID_HCAM_CODE_LOG_DATA);
+}
+
+/**
+ * pmcraid_unregister_hcams - cancel HCAMs registered already
+ * @cmd: pointer to command used as part of reset sequence
+ */
+static void pmcraid_unregister_hcams(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+
+        /* During IOA bringdown, HCAM gets fired and tasklet proceeds with
+         * handling hcam response though it is not necessary. In order to
+         * prevent this, set 'ignore', so that bring-down sequence doesn't
+         * re-send any more hcams
+         */
+        atomic_set(&pinstance->ccn.ignore, 1);
+        atomic_set(&pinstance->ldn.ignore, 1);
+
+        /* If adapter reset was forced as part of runtime reset sequence,
+         * start the reset sequence.
+         */
+        if (pinstance->force_ioa_reset && !pinstance->ioa_bringdown) {
+                pinstance->force_ioa_reset = 0;
+                pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
+                pmcraid_reset_alert(cmd);
+                return;
+        }
+
+        /* Driver tries to cancel HCAMs by sending ABORT TASK for each HCAM
+         * one after the other. So CCN cancellation will be triggered by
+         * pmcraid_cancel_ldn itself.
+         */
+        pmcraid_cancel_ldn(cmd);
+}
+
+/**
+ * pmcraid_reset_enable_ioa - re-enable IOA after a hard reset
+ * @pinstance: pointer to adapter instance structure
+ * Return Value
+ *  1 if TRANSITION_TO_OPERATIONAL is active, otherwise 0
+ */
+static void pmcraid_reinit_buffers(struct pmcraid_instance *);
+
+static int pmcraid_reset_enable_ioa(struct pmcraid_instance *pinstance)
+{
+        u32 intrs;
+
+        pmcraid_reinit_buffers(pinstance);
+        intrs = pmcraid_read_interrupts(pinstance);
+
+        pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
+
+        if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
+                iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
+                        pinstance->int_regs.ioa_host_interrupt_mask_reg);
+                iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
+                        pinstance->int_regs.ioa_host_interrupt_clr_reg);
+                return 1;
+        } else {
+                return 0;
+        }
+}
+
+/**
+ * pmcraid_soft_reset - performs a soft reset and makes IOA become ready
+ * @cmd : pointer to reset command block
+ *
+ * Return Value
+ *      none
+ */
+static void pmcraid_soft_reset(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u32 int_reg;
+        u32 doorbell;
+
+        /* There will be an interrupt when Transition to Operational bit is
+         * set so tasklet would execute next reset task. The timeout handler
+         * would re-initiate a reset
+         */
+        cmd->cmd_done = pmcraid_ioa_reset;
+        cmd->timer.data = (unsigned long)cmd;
+        cmd->timer.expires = jiffies +
+                             msecs_to_jiffies(PMCRAID_TRANSOP_TIMEOUT);
+        cmd->timer.function = (void (*)(unsigned long))pmcraid_timeout_handler;
+
+        if (!timer_pending(&cmd->timer))
+                add_timer(&cmd->timer);
+
+        /* Enable destructive diagnostics on IOA if it is not yet in
+         * operational state
+         */
+        doorbell = DOORBELL_RUNTIME_RESET |
+                   DOORBELL_ENABLE_DESTRUCTIVE_DIAGS;
+
+        iowrite32(doorbell, pinstance->int_regs.host_ioa_interrupt_reg);
+        int_reg = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
+        pmcraid_info("Waiting for IOA to become operational %x:%x\n",
+                     ioread32(pinstance->int_regs.host_ioa_interrupt_reg),
+                     int_reg);
+}
+
+/**
+ * pmcraid_get_dump - retrieves IOA dump in case of Unit Check interrupt
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return Value
+ *      none
+ */
+static void pmcraid_get_dump(struct pmcraid_instance *pinstance)
+{
+        pmcraid_info("%s is not yet implemented\n", __func__);
+}
+
+/**
+ * pmcraid_fail_outstanding_cmds - Fails all outstanding ops.
+ * @pinstance: pointer to adapter instance structure
+ *
+ * This function fails all outstanding ops. If they are submitted to IOA
+ * already, it sends cancel all messages if IOA is still accepting IOARCBs,
+ * otherwise just completes the commands and returns the cmd blocks to free
+ * pool.
+ *
+ * Return value:
+ *       none
+ */
+static void pmcraid_fail_outstanding_cmds(struct pmcraid_instance *pinstance)
+{
+        struct pmcraid_cmd *cmd, *temp;
+        unsigned long lock_flags;
+
+        /* pending command list is protected by pending_pool_lock. Its
+         * traversal must be done as within this lock
+         */
+        spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
+        list_for_each_entry_safe(cmd, temp, &pinstance->pending_cmd_pool,
+                                 free_list) {
+                list_del(&cmd->free_list);
+                spin_unlock_irqrestore(&pinstance->pending_pool_lock,
+                                        lock_flags);
+                cmd->ioa_cb->ioasa.ioasc =
+                        cpu_to_le32(PMCRAID_IOASC_IOA_WAS_RESET);
+                cmd->ioa_cb->ioasa.ilid =
+                        cpu_to_be32(PMCRAID_DRIVER_ILID);
+
+                /* In case the command timer is still running */
+                del_timer(&cmd->timer);
+
+                /* If this is an IO command, complete it by invoking scsi_done
+                 * function. If this is one of the internal commands other
+                 * than pmcraid_ioa_reset and HCAM commands invoke cmd_done to
+                 * complete it
+                 */
+                if (cmd->scsi_cmd) {
+
+                        struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
+                        __le32 resp = cmd->ioa_cb->ioarcb.response_handle;
+
+                        scsi_cmd->result |= DID_ERROR << 16;
+
+                        scsi_dma_unmap(scsi_cmd);
+                        pmcraid_return_cmd(cmd);
+
+
+                        pmcraid_info("failing(%d) CDB[0] = %x result: %x\n",
+                                     le32_to_cpu(resp) >> 2,
+                                     cmd->ioa_cb->ioarcb.cdb[0],
+                                     scsi_cmd->result);
+                        scsi_cmd->scsi_done(scsi_cmd);
+                } else if (cmd->cmd_done == pmcraid_internal_done ||
+                           cmd->cmd_done == pmcraid_erp_done) {
+                        cmd->cmd_done(cmd);
+                } else if (cmd->cmd_done != pmcraid_ioa_reset) {
+                        pmcraid_return_cmd(cmd);
+                }
+
+                atomic_dec(&pinstance->outstanding_cmds);
+                spin_lock_irqsave(&pinstance->pending_pool_lock, lock_flags);
+        }
+
+        spin_unlock_irqrestore(&pinstance->pending_pool_lock, lock_flags);
+}
+
+/**
+ * pmcraid_ioa_reset - Implementation of IOA reset logic
+ *
+ * @cmd: pointer to the cmd block to be used for entire reset process
+ *
+ * This function executes most of the steps required for IOA reset. This gets
+ * called by user threads (modprobe/insmod/rmmod) timer, tasklet and midlayer's
+ * 'eh_' thread. Access to variables used for controling the reset sequence is
+ * synchronized using host lock. Various functions called during reset process
+ * would make use of a single command block, pointer to which is also stored in
+ * adapter instance structure.
+ *
+ * Return Value
+ *       None
+ */
+static void pmcraid_ioa_reset(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        u8 reset_complete = 0;
+
+        pinstance->ioa_reset_in_progress = 1;
+
+        if (pinstance->reset_cmd != cmd) {
+                pmcraid_err("reset is called with different command block\n");
+                pinstance->reset_cmd = cmd;
+        }
+
+        pmcraid_info("reset_engine: state = %d, command = %p\n",
+                      pinstance->ioa_state, cmd);
+
+        switch (pinstance->ioa_state) {
+
+        case IOA_STATE_DEAD:
+                /* If IOA is offline, whatever may be the reset reason, just
+                 * return. callers might be waiting on the reset wait_q, wake
+                 * up them
+                 */
+                pmcraid_err("IOA is offline no reset is possible\n");
+                reset_complete = 1;
+                break;
+
+        case IOA_STATE_IN_BRINGDOWN:
+                /* we enter here, once ioa shutdown command is processed by IOA
+                 * Alert IOA for a possible reset. If reset alert fails, IOA
+                 * goes through hard-reset
+                 */
+                pmcraid_disable_interrupts(pinstance, ~0);
+                pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
+                pmcraid_reset_alert(cmd);
+                break;
+
+        case IOA_STATE_UNKNOWN:
+                /* We may be called during probe or resume. Some pre-processing
+                 * is required for prior to reset
+                 */
+                scsi_block_requests(pinstance->host);
+
+                /* If asked to reset while IOA was processing responses or
+                 * there are any error responses then IOA may require
+                 * hard-reset.
+                 */
+                if (pinstance->ioa_hard_reset == 0) {
+                        if (ioread32(pinstance->ioa_status) &
+                            INTRS_TRANSITION_TO_OPERATIONAL) {
+                                pmcraid_info("sticky bit set, bring-up\n");
+                                pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
+                                pmcraid_reinit_cmdblk(cmd);
+                                pmcraid_identify_hrrq(cmd);
+                        } else {
+                                pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
+                                pmcraid_soft_reset(cmd);
+                        }
+                } else {
+                        /* Alert IOA of a possible reset and wait for critical
+                         * operation in progress bit to reset
+                         */
+                        pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
+                        pmcraid_reset_alert(cmd);
+                }
+                break;
+
+        case IOA_STATE_IN_RESET_ALERT:
+                /* If critical operation in progress bit is reset or wait gets
+                 * timed out, reset proceeds with starting BIST on the IOA.
+                 * pmcraid_ioa_hard_reset keeps a count of reset attempts. If
+                 * they are 3 or more, reset engine marks IOA dead and returns
+                 */
+                pinstance->ioa_state = IOA_STATE_IN_HARD_RESET;
+                pmcraid_start_bist(cmd);
+                break;
+
+        case IOA_STATE_IN_HARD_RESET:
+                pinstance->ioa_reset_attempts++;
+
+                /* retry reset if we haven't reached maximum allowed limit */
+                if (pinstance->ioa_reset_attempts > PMCRAID_RESET_ATTEMPTS) {
+                        pinstance->ioa_reset_attempts = 0;
+                        pmcraid_err("IOA didn't respond marking it as dead\n");
+                        pinstance->ioa_state = IOA_STATE_DEAD;
+                        reset_complete = 1;
+                        break;
+                }
+
+                /* Once either bist or pci reset is done, restore PCI config
+                 * space. If this fails, proceed with hard reset again
+                 */
+
+                if (pci_restore_state(pinstance->pdev)) {
+                        pmcraid_info("config-space error resetting again\n");
+                        pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
+                        pmcraid_reset_alert(cmd);
+                        break;
+                }
+
+                /* fail all pending commands */
+                pmcraid_fail_outstanding_cmds(pinstance);
+
+                /* check if unit check is active, if so extract dump */
+                if (pinstance->ioa_unit_check) {
+                        pmcraid_info("unit check is active\n");
+                        pinstance->ioa_unit_check = 0;
+                        pmcraid_get_dump(pinstance);
+                        pinstance->ioa_reset_attempts--;
+                        pinstance->ioa_state = IOA_STATE_IN_RESET_ALERT;
+                        pmcraid_reset_alert(cmd);
+                        break;
+                }
+
+                /* if the reset reason is to bring-down the ioa, we might be
+                 * done with the reset restore pci_config_space and complete
+                 * the reset
+                 */
+                if (pinstance->ioa_bringdown) {
+                        pmcraid_info("bringing down the adapter\n");
+                        pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
+                        pinstance->ioa_bringdown = 0;
+                        pinstance->ioa_state = IOA_STATE_UNKNOWN;
+                        reset_complete = 1;
+                } else {
+                        /* bring-up IOA, so proceed with soft reset
+                         * Reinitialize hrrq_buffers and their indices also
+                         * enable interrupts after a pci_restore_state
+                         */
+                        if (pmcraid_reset_enable_ioa(pinstance)) {
+                                pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
+                                pmcraid_info("bringing up the adapter\n");
+                                pmcraid_reinit_cmdblk(cmd);
+                                pmcraid_identify_hrrq(cmd);
+                        } else {
+                                pinstance->ioa_state = IOA_STATE_IN_SOFT_RESET;
+                                pmcraid_soft_reset(cmd);
+                        }
+                }
+                break;
+
+        case IOA_STATE_IN_SOFT_RESET:
+                /* TRANSITION TO OPERATIONAL is on so start initialization
+                 * sequence
+                 */
+                pmcraid_info("In softreset proceeding with bring-up\n");
+                pinstance->ioa_state = IOA_STATE_IN_BRINGUP;
+
+                /* Initialization commands start with HRRQ identification. From
+                 * now on tasklet completes most of the commands as IOA is up
+                 * and intrs are enabled
+                 */
+                pmcraid_identify_hrrq(cmd);
+                break;
+
+        case IOA_STATE_IN_BRINGUP:
+                /* we are done with bringing up of IOA, change the ioa_state to
+                 * operational and wake up any waiters
+                 */
+                pinstance->ioa_state = IOA_STATE_OPERATIONAL;
+                reset_complete = 1;
+                break;
+
+        case IOA_STATE_OPERATIONAL:
+        default:
+                /* When IOA is operational and a reset is requested, check for
+                 * the reset reason. If reset is to bring down IOA, unregister
+                 * HCAMs and initiate shutdown; if adapter reset is forced then
+                 * restart reset sequence again
+                 */
+                if (pinstance->ioa_shutdown_type == SHUTDOWN_NONE &&
+                    pinstance->force_ioa_reset == 0) {
+                        reset_complete = 1;
+                } else {
+                        if (pinstance->ioa_shutdown_type != SHUTDOWN_NONE)
+                                pinstance->ioa_state = IOA_STATE_IN_BRINGDOWN;
+                        pmcraid_reinit_cmdblk(cmd);
+                        pmcraid_unregister_hcams(cmd);
+                }
+                break;
+        }
+
+        /* reset will be completed if ioa_state is either DEAD or UNKNOWN or
+         * OPERATIONAL. Reset all control variables used during reset, wake up
+         * any waiting threads and let the SCSI mid-layer send commands. Note
+         * that host_lock must be held before invoking scsi_report_bus_reset.
+         */
+        if (reset_complete) {
+                pinstance->ioa_reset_in_progress = 0;
+                pinstance->ioa_reset_attempts = 0;
+                pinstance->reset_cmd = NULL;
+                pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
+                pinstance->ioa_bringdown = 0;
+                pmcraid_return_cmd(cmd);
+
+                /* If target state is to bring up the adapter, proceed with
+                 * hcam registration and resource exposure to mid-layer.
+                 */
+                if (pinstance->ioa_state == IOA_STATE_OPERATIONAL)
+                        pmcraid_register_hcams(pinstance);
+
+                wake_up_all(&pinstance->reset_wait_q);
+        }
+
+        return;
+}
+
+/**
+ * pmcraid_initiate_reset - initiates reset sequence. This is called from
+ * ISR/tasklet during error interrupts including IOA unit check. If reset
+ * is already in progress, it just returns, otherwise initiates IOA reset
+ * to bring IOA up to operational state.
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return value
+ *       none
+ */
+static void pmcraid_initiate_reset(struct pmcraid_instance *pinstance)
+{
+        struct pmcraid_cmd *cmd;
+
+        /* If the reset is already in progress, just return, otherwise start
+         * reset sequence and return
+         */
+        if (!pinstance->ioa_reset_in_progress) {
+                scsi_block_requests(pinstance->host);
+                cmd = pmcraid_get_free_cmd(pinstance);
+
+                if (cmd == NULL) {
+                        pmcraid_err("no cmnd blocks for initiate_reset\n");
+                        return;
+                }
+
+                pinstance->ioa_shutdown_type = SHUTDOWN_NONE;
+                pinstance->reset_cmd = cmd;
+                pinstance->force_ioa_reset = 1;
+                pmcraid_ioa_reset(cmd);
+        }
+}
+
+/**
+ * pmcraid_reset_reload - utility routine for doing IOA reset either to bringup
+ *                        or bringdown IOA
+ * @pinstance: pointer adapter instance structure
+ * @shutdown_type: shutdown type to be used NONE, NORMAL or ABRREV
+ * @target_state: expected target state after reset
+ *
+ * Note: This command initiates reset and waits for its completion. Hence this
+ * should not be called from isr/timer/tasklet functions (timeout handlers,
+ * error response handlers and interrupt handlers).
+ *
+ * Return Value
+ *       1 in case ioa_state is not target_state, 0 otherwise.
+ */
+static int pmcraid_reset_reload(
+        struct pmcraid_instance *pinstance,
+        u8 shutdown_type,
+        u8 target_state
+)
+{
+        struct pmcraid_cmd *reset_cmd = NULL;
+        unsigned long lock_flags;
+        int reset = 1;
+
+        spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+
+        if (pinstance->ioa_reset_in_progress) {
+                pmcraid_info("reset_reload: reset is already in progress\n");
+
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+
+                wait_event(pinstance->reset_wait_q,
+                           !pinstance->ioa_reset_in_progress);
+
+                spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+
+                if (pinstance->ioa_state == IOA_STATE_DEAD) {
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               lock_flags);
+                        pmcraid_info("reset_reload: IOA is dead\n");
+                        return reset;
+                } else if (pinstance->ioa_state == target_state) {
+                        reset = 0;
+                }
+        }
+
+        if (reset) {
+                pmcraid_info("reset_reload: proceeding with reset\n");
+                scsi_block_requests(pinstance->host);
+                reset_cmd = pmcraid_get_free_cmd(pinstance);
+
+                if (reset_cmd == NULL) {
+                        pmcraid_err("no free cmnd for reset_reload\n");
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               lock_flags);
+                        return reset;
+                }
+
+                if (shutdown_type == SHUTDOWN_NORMAL)
+                        pinstance->ioa_bringdown = 1;
+
+                pinstance->ioa_shutdown_type = shutdown_type;
+                pinstance->reset_cmd = reset_cmd;
+                pinstance->force_ioa_reset = reset;
+                pmcraid_info("reset_reload: initiating reset\n");
+                pmcraid_ioa_reset(reset_cmd);
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+                pmcraid_info("reset_reload: waiting for reset to complete\n");
+                wait_event(pinstance->reset_wait_q,
+                           !pinstance->ioa_reset_in_progress);
+
+                pmcraid_info("reset_reload: reset is complete !! \n");
+                scsi_unblock_requests(pinstance->host);
+                if (pinstance->ioa_state == target_state)
+                        reset = 0;
+        }
+
+        return reset;
+}
+
+/**
+ * pmcraid_reset_bringdown - wrapper over pmcraid_reset_reload to bringdown IOA
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return Value
+ *       whatever is returned from pmcraid_reset_reload
+ */
+static int pmcraid_reset_bringdown(struct pmcraid_instance *pinstance)
+{
+        return pmcraid_reset_reload(pinstance,
+                                    SHUTDOWN_NORMAL,
+                                    IOA_STATE_UNKNOWN);
+}
+
+/**
+ * pmcraid_reset_bringup - wrapper over pmcraid_reset_reload to bring up IOA
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return Value
+ *       whatever is returned from pmcraid_reset_reload
+ */
+static int pmcraid_reset_bringup(struct pmcraid_instance *pinstance)
+{
+        return pmcraid_reset_reload(pinstance,
+                                    SHUTDOWN_NONE,
+                                    IOA_STATE_OPERATIONAL);
+}
+
+/**
+ * pmcraid_request_sense - Send request sense to a device
+ * @cmd: pmcraid command struct
+ *
+ * This function sends a request sense to a device as a result of a check
+ * condition. This method re-uses the same command block that failed earlier.
+ */
+static void pmcraid_request_sense(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
+
+        /* allocate DMAable memory for sense buffers */
+        cmd->sense_buffer = pci_alloc_consistent(cmd->drv_inst->pdev,
+                                                 SCSI_SENSE_BUFFERSIZE,
+                                                 &cmd->sense_buffer_dma);
+
+        if (cmd->sense_buffer == NULL) {
+                pmcraid_err
+                        ("couldn't allocate sense buffer for request sense\n");
+                pmcraid_erp_done(cmd);
+                return;
+        }
+
+        /* re-use the command block */
+        memset(&cmd->ioa_cb->ioasa, 0, sizeof(struct pmcraid_ioasa));
+        memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
+        ioarcb->request_flags0 = (SYNC_COMPLETE |
+                                  NO_LINK_DESCS |
+                                  INHIBIT_UL_CHECK);
+        ioarcb->request_type = REQ_TYPE_SCSI;
+        ioarcb->cdb[0] = REQUEST_SENSE;
+        ioarcb->cdb[4] = SCSI_SENSE_BUFFERSIZE;
+
+        ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
+                                        offsetof(struct pmcraid_ioarcb,
+                                                add_data.u.ioadl[0]));
+        ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
+
+        ioarcb->data_transfer_length = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
+
+        ioadl->address = cpu_to_le64(cmd->sense_buffer_dma);
+        ioadl->data_len = cpu_to_le32(SCSI_SENSE_BUFFERSIZE);
+        ioadl->flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
+
+        /* request sense might be called as part of error response processing
+         * which runs in tasklets context. It is possible that mid-layer might
+         * schedule queuecommand during this time, hence, writting to IOARRIN
+         * must be protect by host_lock
+         */
+        pmcraid_send_cmd(cmd, pmcraid_erp_done,
+                         PMCRAID_REQUEST_SENSE_TIMEOUT,
+                         pmcraid_timeout_handler);
+}
+
+/**
+ * pmcraid_cancel_all - cancel all outstanding IOARCBs as part of error recovery
+ * @cmd: command that failed
+ * @sense: true if request_sense is required after cancel all
+ *
+ * This function sends a cancel all to a device to clear the queue.
+ */
+static void pmcraid_cancel_all(struct pmcraid_cmd *cmd, u32 sense)
+{
+        struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
+        void (*cmd_done) (struct pmcraid_cmd *) = sense ? pmcraid_erp_done
+                                                        : pmcraid_request_sense;
+
+        memset(ioarcb->cdb, 0, PMCRAID_MAX_CDB_LEN);
+        ioarcb->request_flags0 = SYNC_OVERRIDE;
+        ioarcb->request_type = REQ_TYPE_IOACMD;
+        ioarcb->cdb[0] = PMCRAID_CANCEL_ALL_REQUESTS;
+
+        if (RES_IS_GSCSI(res->cfg_entry))
+                ioarcb->cdb[1] = PMCRAID_SYNC_COMPLETE_AFTER_CANCEL;
+
+        ioarcb->ioadl_bus_addr = 0;
+        ioarcb->ioadl_length = 0;
+        ioarcb->data_transfer_length = 0;
+        ioarcb->ioarcb_bus_addr &= (~0x1FULL);
+
+        /* writing to IOARRIN must be protected by host_lock, as mid-layer
+         * schedule queuecommand while we are doing this
+         */
+        pmcraid_send_cmd(cmd, cmd_done,
+                         PMCRAID_REQUEST_SENSE_TIMEOUT,
+                         pmcraid_timeout_handler);
+}
+
+/**
+ * pmcraid_frame_auto_sense: frame fixed format sense information
+ *
+ * @cmd: pointer to failing command block
+ *
+ * Return value
+ *  none
+ */
+static void pmcraid_frame_auto_sense(struct pmcraid_cmd *cmd)
+{
+        u8 *sense_buf = cmd->scsi_cmd->sense_buffer;
+        struct pmcraid_resource_entry *res = cmd->scsi_cmd->device->hostdata;
+        struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
+        u32 ioasc = le32_to_cpu(ioasa->ioasc);
+        u32 failing_lba = 0;
+
+        memset(sense_buf, 0, SCSI_SENSE_BUFFERSIZE);
+        cmd->scsi_cmd->result = SAM_STAT_CHECK_CONDITION;
+
+        if (RES_IS_VSET(res->cfg_entry) &&
+            ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC &&
+            ioasa->u.vset.failing_lba_hi != 0) {
+
+                sense_buf[0] = 0x72;
+                sense_buf[1] = PMCRAID_IOASC_SENSE_KEY(ioasc);
+                sense_buf[2] = PMCRAID_IOASC_SENSE_CODE(ioasc);
+                sense_buf[3] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
+
+                sense_buf[7] = 12;
+                sense_buf[8] = 0;
+                sense_buf[9] = 0x0A;
+                sense_buf[10] = 0x80;
+
+                failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_hi);
+
+                sense_buf[12] = (failing_lba & 0xff000000) >> 24;
+                sense_buf[13] = (failing_lba & 0x00ff0000) >> 16;
+                sense_buf[14] = (failing_lba & 0x0000ff00) >> 8;
+                sense_buf[15] = failing_lba & 0x000000ff;
+
+                failing_lba = le32_to_cpu(ioasa->u.vset.failing_lba_lo);
+
+                sense_buf[16] = (failing_lba & 0xff000000) >> 24;
+                sense_buf[17] = (failing_lba & 0x00ff0000) >> 16;
+                sense_buf[18] = (failing_lba & 0x0000ff00) >> 8;
+                sense_buf[19] = failing_lba & 0x000000ff;
+        } else {
+                sense_buf[0] = 0x70;
+                sense_buf[2] = PMCRAID_IOASC_SENSE_KEY(ioasc);
+                sense_buf[12] = PMCRAID_IOASC_SENSE_CODE(ioasc);
+                sense_buf[13] = PMCRAID_IOASC_SENSE_QUAL(ioasc);
+
+                if (ioasc == PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC) {
+                        if (RES_IS_VSET(res->cfg_entry))
+                                failing_lba =
+                                        le32_to_cpu(ioasa->u.
+                                                 vset.failing_lba_lo);
+                        sense_buf[0] |= 0x80;
+                        sense_buf[3] = (failing_lba >> 24) & 0xff;
+                        sense_buf[4] = (failing_lba >> 16) & 0xff;
+                        sense_buf[5] = (failing_lba >> 8) & 0xff;
+                        sense_buf[6] = failing_lba & 0xff;
+                }
+
+                sense_buf[7] = 6; /* additional length */
+        }
+}
+
+/**
+ * pmcraid_error_handler - Error response handlers for a SCSI op
+ * @cmd: pointer to pmcraid_cmd that has failed
+ *
+ * This function determines whether or not to initiate ERP on the affected
+ * device. This is called from a tasklet, which doesn't hold any locks.
+ *
+ * Return value:
+ *       0 it caller can complete the request, otherwise 1 where in error
+ *       handler itself completes the request and returns the command block
+ *       back to free-pool
+ */
+static int pmcraid_error_handler(struct pmcraid_cmd *cmd)
+{
+        struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
+        struct pmcraid_resource_entry *res = scsi_cmd->device->hostdata;
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        struct pmcraid_ioasa *ioasa = &cmd->ioa_cb->ioasa;
+        u32 ioasc = le32_to_cpu(ioasa->ioasc);
+        u32 masked_ioasc = ioasc & PMCRAID_IOASC_SENSE_MASK;
+        u32 sense_copied = 0;
+
+        if (!res) {
+                pmcraid_info("resource pointer is NULL\n");
+                return 0;
+        }
+
+        /* If this was a SCSI read/write command keep count of errors */
+        if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_READ_CMD)
+                atomic_inc(&res->read_failures);
+        else if (SCSI_CMD_TYPE(scsi_cmd->cmnd[0]) == SCSI_WRITE_CMD)
+                atomic_inc(&res->write_failures);
+
+        if (!RES_IS_GSCSI(res->cfg_entry) &&
+                masked_ioasc != PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR) {
+                pmcraid_frame_auto_sense(cmd);
+        }
+
+        /* Log IOASC/IOASA information based on user settings */
+        pmcraid_ioasc_logger(ioasc, cmd);
+
+        switch (masked_ioasc) {
+
+        case PMCRAID_IOASC_AC_TERMINATED_BY_HOST:
+                scsi_cmd->result |= (DID_ABORT << 16);
+                break;
+
+        case PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE:
+        case PMCRAID_IOASC_HW_CANNOT_COMMUNICATE:
+                scsi_cmd->result |= (DID_NO_CONNECT << 16);
+                break;
+
+        case PMCRAID_IOASC_NR_SYNC_REQUIRED:
+                res->sync_reqd = 1;
+                scsi_cmd->result |= (DID_IMM_RETRY << 16);
+                break;
+
+        case PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC:
+                scsi_cmd->result |= (DID_PASSTHROUGH << 16);
+                break;
+
+        case PMCRAID_IOASC_UA_BUS_WAS_RESET:
+        case PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER:
+                if (!res->reset_progress)
+                        scsi_report_bus_reset(pinstance->host,
+                                              scsi_cmd->device->channel);
+                scsi_cmd->result |= (DID_ERROR << 16);
+                break;
+
+        case PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR:
+                scsi_cmd->result |= PMCRAID_IOASC_SENSE_STATUS(ioasc);
+                res->sync_reqd = 1;
+
+                /* if check_condition is not active return with error otherwise
+                 * get/frame the sense buffer
+                 */
+                if (PMCRAID_IOASC_SENSE_STATUS(ioasc) !=
+                    SAM_STAT_CHECK_CONDITION &&
+                    PMCRAID_IOASC_SENSE_STATUS(ioasc) != SAM_STAT_ACA_ACTIVE)
+                        return 0;
+
+                /* If we have auto sense data as part of IOASA pass it to
+                 * mid-layer
+                 */
+                if (ioasa->auto_sense_length != 0) {
+                        short sense_len = ioasa->auto_sense_length;
+                        int data_size = min_t(u16, le16_to_cpu(sense_len),
+                                              SCSI_SENSE_BUFFERSIZE);
+
+                        memcpy(scsi_cmd->sense_buffer,
+                               ioasa->sense_data,
+                               data_size);
+                        sense_copied = 1;
+                }
+
+                if (RES_IS_GSCSI(res->cfg_entry)) {
+                        pmcraid_cancel_all(cmd, sense_copied);
+                } else if (sense_copied) {
+                        pmcraid_erp_done(cmd);
+                        return 0;
+                } else  {
+                        pmcraid_request_sense(cmd);
+                }
+
+                return 1;
+
+        case PMCRAID_IOASC_NR_INIT_CMD_REQUIRED:
+                break;
+
+        default:
+                if (PMCRAID_IOASC_SENSE_KEY(ioasc) > RECOVERED_ERROR)
+                        scsi_cmd->result |= (DID_ERROR << 16);
+                break;
+        }
+        return 0;
+}
+
+/**
+ * pmcraid_reset_device - device reset handler functions
+ *
+ * @scsi_cmd: scsi command struct
+ * @modifier: reset modifier indicating the reset sequence to be performed
+ *
+ * This function issues a device reset to the affected device.
+ * A LUN reset will be sent to the device first. If that does
+ * not work, a target reset will be sent.
+ *
+ * Return value:
+ *      SUCCESS / FAILED
+ */
+static int pmcraid_reset_device(
+        struct scsi_cmnd *scsi_cmd,
+        unsigned long timeout,
+        u8 modifier
+)
+{
+        struct pmcraid_cmd *cmd;
+        struct pmcraid_instance *pinstance;
+        struct pmcraid_resource_entry *res;
+        struct pmcraid_ioarcb *ioarcb;
+        unsigned long lock_flags;
+        u32 ioasc;
+
+        pinstance =
+                (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
+        res = scsi_cmd->device->hostdata;
+
+        if (!res) {
+                pmcraid_err("reset_device: NULL resource pointer\n");
+                return FAILED;
+        }
+
+        /* If adapter is currently going through reset/reload, return failed.
+         * This will force the mid-layer to call _eh_bus/host reset, which
+         * will then go to sleep and wait for the reset to complete
+         */
+        spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+        if (pinstance->ioa_reset_in_progress ||
+            pinstance->ioa_state == IOA_STATE_DEAD) {
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+                return FAILED;
+        }
+
+        res->reset_progress = 1;
+        pmcraid_info("Resetting %s resource with addr %x\n",
+                     ((modifier & RESET_DEVICE_LUN) ? "LUN" :
+                     ((modifier & RESET_DEVICE_TARGET) ? "TARGET" : "BUS")),
+                     le32_to_cpu(res->cfg_entry.resource_address));
+
+        /* get a free cmd block */
+        cmd = pmcraid_get_free_cmd(pinstance);
+
+        if (cmd == NULL) {
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+                pmcraid_err("%s: no cmd blocks are available\n", __func__);
+                return FAILED;
+        }
+
+        ioarcb = &cmd->ioa_cb->ioarcb;
+        ioarcb->resource_handle = res->cfg_entry.resource_handle;
+        ioarcb->request_type = REQ_TYPE_IOACMD;
+        ioarcb->cdb[0] = PMCRAID_RESET_DEVICE;
+
+        /* Initialize reset modifier bits */
+        if (modifier)
+                modifier = ENABLE_RESET_MODIFIER | modifier;
+
+        ioarcb->cdb[1] = modifier;
+
+        init_completion(&cmd->wait_for_completion);
+        cmd->completion_req = 1;
+
+        pmcraid_info("cmd(CDB[0] = %x) for %x with index = %d\n",
+                     cmd->ioa_cb->ioarcb.cdb[0],
+                     le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle),
+                     le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2);
+
+        pmcraid_send_cmd(cmd,
+                         pmcraid_internal_done,
+                         timeout,
+                         pmcraid_timeout_handler);
+
+        spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+
+        /* RESET_DEVICE command completes after all pending IOARCBs are
+         * completed. Once this command is completed, pmcraind_internal_done
+         * will wake up the 'completion' queue.
+         */
+        wait_for_completion(&cmd->wait_for_completion);
+
+        /* complete the command here itself and return the command block
+         * to free list
+         */
+        pmcraid_return_cmd(cmd);
+        res->reset_progress = 0;
+        ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
+
+        /* set the return value based on the returned ioasc */
+        return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
+}
+
+/**
+ * _pmcraid_io_done - helper for pmcraid_io_done function
+ *
+ * @cmd: pointer to pmcraid command struct
+ * @reslen: residual data length to be set in the ioasa
+ * @ioasc: ioasc either returned by IOA or set by driver itself.
+ *
+ * This function is invoked by pmcraid_io_done to complete mid-layer
+ * scsi ops.
+ *
+ * Return value:
+ *        0 if caller is required to return it to free_pool. Returns 1 if
+ *        caller need not worry about freeing command block as error handler
+ *        will take care of that.
+ */
+
+static int _pmcraid_io_done(struct pmcraid_cmd *cmd, int reslen, int ioasc)
+{
+        struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
+        int rc = 0;
+
+        scsi_set_resid(scsi_cmd, reslen);
+
+        pmcraid_info("response(%d) CDB[0] = %x ioasc:result: %x:%x\n",
+                le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
+                cmd->ioa_cb->ioarcb.cdb[0],
+                ioasc, scsi_cmd->result);
+
+        if (PMCRAID_IOASC_SENSE_KEY(ioasc) != 0)
+                rc = pmcraid_error_handler(cmd);
+
+        if (rc == 0) {
+                scsi_dma_unmap(scsi_cmd);
+                scsi_cmd->scsi_done(scsi_cmd);
+        }
+
+        return rc;
+}
+
+/**
+ * pmcraid_io_done - SCSI completion function
+ *
+ * @cmd: pointer to pmcraid command struct
+ *
+ * This function is invoked by tasklet/mid-layer error handler to completing
+ * the SCSI ops sent from mid-layer.
+ *
+ * Return value
+ *        none
+ */
+
+static void pmcraid_io_done(struct pmcraid_cmd *cmd)
+{
+        u32 ioasc = le32_to_cpu(cmd->ioa_cb->ioasa.ioasc);
+        u32 reslen = le32_to_cpu(cmd->ioa_cb->ioasa.residual_data_length);
+
+        if (_pmcraid_io_done(cmd, reslen, ioasc) == 0)
+                pmcraid_return_cmd(cmd);
+}
+
+/**
+ * pmcraid_abort_cmd - Aborts a single IOARCB already submitted to IOA
+ *
+ * @cmd: command block of the command to be aborted
+ *
+ * Return Value:
+ *       returns pointer to command structure used as cancelling cmd
+ */
+static struct pmcraid_cmd *pmcraid_abort_cmd(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_cmd *cancel_cmd;
+        struct pmcraid_instance *pinstance;
+        struct pmcraid_resource_entry *res;
+
+        pinstance = (struct pmcraid_instance *)cmd->drv_inst;
+        res = cmd->scsi_cmd->device->hostdata;
+
+        cancel_cmd = pmcraid_get_free_cmd(pinstance);
+
+        if (cancel_cmd == NULL) {
+                pmcraid_err("%s: no cmd blocks are available\n", __func__);
+                return NULL;
+        }
+
+        pmcraid_prepare_cancel_cmd(cancel_cmd, cmd);
+
+        pmcraid_info("aborting command CDB[0]= %x with index = %d\n",
+                cmd->ioa_cb->ioarcb.cdb[0],
+                cmd->ioa_cb->ioarcb.response_handle >> 2);
+
+        init_completion(&cancel_cmd->wait_for_completion);
+        cancel_cmd->completion_req = 1;
+
+        pmcraid_info("command (%d) CDB[0] = %x for %x\n",
+                le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.response_handle) >> 2,
+                cmd->ioa_cb->ioarcb.cdb[0],
+                le32_to_cpu(cancel_cmd->ioa_cb->ioarcb.resource_handle));
+
+        pmcraid_send_cmd(cancel_cmd,
+                         pmcraid_internal_done,
+                         PMCRAID_INTERNAL_TIMEOUT,
+                         pmcraid_timeout_handler);
+        return cancel_cmd;
+}
+
+/**
+ * pmcraid_abort_complete - Waits for ABORT TASK completion
+ *
+ * @cancel_cmd: command block use as cancelling command
+ *
+ * Return Value:
+ *       returns SUCCESS if ABORT TASK has good completion
+ *       otherwise FAILED
+ */
+static int pmcraid_abort_complete(struct pmcraid_cmd *cancel_cmd)
+{
+        struct pmcraid_resource_entry *res;
+        u32 ioasc;
+
+        wait_for_completion(&cancel_cmd->wait_for_completion);
+        res = cancel_cmd->u.res;
+        cancel_cmd->u.res = NULL;
+        ioasc = le32_to_cpu(cancel_cmd->ioa_cb->ioasa.ioasc);
+
+        /* If the abort task is not timed out we will get a Good completion
+         * as sense_key, otherwise we may get one the following responses
+         * due to subsquent bus reset or device reset. In case IOASC is
+         * NR_SYNC_REQUIRED, set sync_reqd flag for the corresponding resource
+         */
+        if (ioasc == PMCRAID_IOASC_UA_BUS_WAS_RESET ||
+            ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED) {
+                if (ioasc == PMCRAID_IOASC_NR_SYNC_REQUIRED)
+                        res->sync_reqd = 1;
+                ioasc = 0;
+        }
+
+        /* complete the command here itself */
+        pmcraid_return_cmd(cancel_cmd);
+        return PMCRAID_IOASC_SENSE_KEY(ioasc) ? FAILED : SUCCESS;
+}
+
+/**
+ * pmcraid_eh_abort_handler - entry point for aborting a single task on errors
+ *
+ * @scsi_cmd:   scsi command struct given by mid-layer. When this is called
+ *              mid-layer ensures that no other commands are queued. This
+ *              never gets called under interrupt, but a separate eh thread.
+ *
+ * Return value:
+ *       SUCCESS / FAILED
+ */
+static int pmcraid_eh_abort_handler(struct scsi_cmnd *scsi_cmd)
+{
+        struct pmcraid_instance *pinstance;
+        struct pmcraid_cmd *cmd;
+        struct pmcraid_resource_entry *res;
+        unsigned long host_lock_flags;
+        unsigned long pending_lock_flags;
+        struct pmcraid_cmd *cancel_cmd = NULL;
+        int cmd_found = 0;
+        int rc = FAILED;
+
+        pinstance =
+                (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
+
+        dev_err(&pinstance->pdev->dev,
+                "I/O command timed out, aborting it.\n");
+
+        res = scsi_cmd->device->hostdata;
+
+        if (res == NULL)
+                return rc;
+
+        /* If we are currently going through reset/reload, return failed.
+         * This will force the mid-layer to eventually call
+         * pmcraid_eh_host_reset which will then go to sleep and wait for the
+         * reset to complete
+         */
+        spin_lock_irqsave(pinstance->host->host_lock, host_lock_flags);
+
+        if (pinstance->ioa_reset_in_progress ||
+            pinstance->ioa_state == IOA_STATE_DEAD) {
+                spin_unlock_irqrestore(pinstance->host->host_lock,
+                                       host_lock_flags);
+                return rc;
+        }
+
+        /* loop over pending cmd list to find cmd corresponding to this
+         * scsi_cmd. Note that this command might not have been completed
+         * already. locking: all pending commands are protected with
+         * pending_pool_lock.
+         */
+        spin_lock_irqsave(&pinstance->pending_pool_lock, pending_lock_flags);
+        list_for_each_entry(cmd, &pinstance->pending_cmd_pool, free_list) {
+
+                if (cmd->scsi_cmd == scsi_cmd) {
+                        cmd_found = 1;
+                        break;
+                }
+        }
+
+        spin_unlock_irqrestore(&pinstance->pending_pool_lock,
+                                pending_lock_flags);
+
+        /* If the command to be aborted was given to IOA and still pending with
+         * it, send ABORT_TASK to abort this and wait for its completion
+         */
+        if (cmd_found)
+                cancel_cmd = pmcraid_abort_cmd(cmd);
+
+        spin_unlock_irqrestore(pinstance->host->host_lock,
+                               host_lock_flags);
+
+        if (cancel_cmd) {
+                cancel_cmd->u.res = cmd->scsi_cmd->device->hostdata;
+                rc = pmcraid_abort_complete(cancel_cmd);
+        }
+
+        return cmd_found ? rc : SUCCESS;
+}
+
+/**
+ * pmcraid_eh_xxxx_reset_handler - bus/target/device reset handler callbacks
+ *
+ * @scmd: pointer to scsi_cmd that was sent to the resource to be reset.
+ *
+ * All these routines invokve pmcraid_reset_device with appropriate parameters.
+ * Since these are called from mid-layer EH thread, no other IO will be queued
+ * to the resource being reset. However, control path (IOCTL) may be active so
+ * it is necessary to synchronize IOARRIN writes which pmcraid_reset_device
+ * takes care by locking/unlocking host_lock.
+ *
+ * Return value
+ *      SUCCESS or FAILED
+ */
+static int pmcraid_eh_device_reset_handler(struct scsi_cmnd *scmd)
+{
+        pmcraid_err("Doing device reset due to an I/O command timeout.\n");
+        return pmcraid_reset_device(scmd,
+                                    PMCRAID_INTERNAL_TIMEOUT,
+                                    RESET_DEVICE_LUN);
+}
+
+static int pmcraid_eh_bus_reset_handler(struct scsi_cmnd *scmd)
+{
+        pmcraid_err("Doing bus reset due to an I/O command timeout.\n");
+        return pmcraid_reset_device(scmd,
+                                    PMCRAID_RESET_BUS_TIMEOUT,
+                                    RESET_DEVICE_BUS);
+}
+
+static int pmcraid_eh_target_reset_handler(struct scsi_cmnd *scmd)
+{
+        pmcraid_err("Doing target reset due to an I/O command timeout.\n");
+        return pmcraid_reset_device(scmd,
+                                    PMCRAID_INTERNAL_TIMEOUT,
+                                    RESET_DEVICE_TARGET);
+}
+
+/**
+ * pmcraid_eh_host_reset_handler - adapter reset handler callback
+ *
+ * @scmd: pointer to scsi_cmd that was sent to a resource of adapter
+ *
+ * Initiates adapter reset to bring it up to operational state
+ *
+ * Return value
+ *      SUCCESS or FAILED
+ */
+static int pmcraid_eh_host_reset_handler(struct scsi_cmnd *scmd)
+{
+        unsigned long interval = 10000; /* 10 seconds interval */
+        int waits = jiffies_to_msecs(PMCRAID_RESET_HOST_TIMEOUT) / interval;
+        struct pmcraid_instance *pinstance =
+                (struct pmcraid_instance *)(scmd->device->host->hostdata);
+
+
+        /* wait for an additional 150 seconds just in case firmware could come
+         * up and if it could complete all the pending commands excluding the
+         * two HCAM (CCN and LDN).
+         */
+        while (waits--) {
+                if (atomic_read(&pinstance->outstanding_cmds) <=
+                    PMCRAID_MAX_HCAM_CMD)
+                        return SUCCESS;
+                msleep(interval);
+        }
+
+        dev_err(&pinstance->pdev->dev,
+                "Adapter being reset due to an I/O command timeout.\n");
+        return pmcraid_reset_bringup(pinstance) == 0 ? SUCCESS : FAILED;
+}
+
+/**
+ * pmcraid_task_attributes - Translate SPI Q-Tags to task attributes
+ * @scsi_cmd:   scsi command struct
+ *
+ * Return value
+ *        number of tags or 0 if the task is not tagged
+ */
+static u8 pmcraid_task_attributes(struct scsi_cmnd *scsi_cmd)
+{
+        char tag[2];
+        u8 rc = 0;
+
+        if (scsi_populate_tag_msg(scsi_cmd, tag)) {
+                switch (tag[0]) {
+                case MSG_SIMPLE_TAG:
+                        rc = TASK_TAG_SIMPLE;
+                        break;
+                case MSG_HEAD_TAG:
+                        rc = TASK_TAG_QUEUE_HEAD;
+                        break;
+                case MSG_ORDERED_TAG:
+                        rc = TASK_TAG_ORDERED;
+                        break;
+                };
+        }
+
+        return rc;
+}
+
+
+/**
+ * pmcraid_init_ioadls - initializes IOADL related fields in IOARCB
+ * @cmd: pmcraid command struct
+ * @sgcount: count of scatter-gather elements
+ *
+ * Return value
+ *   returns pointer pmcraid_ioadl_desc, initialized to point to internal
+ *   or external IOADLs
+ */
+struct pmcraid_ioadl_desc *
+pmcraid_init_ioadls(struct pmcraid_cmd *cmd, int sgcount)
+{
+        struct pmcraid_ioadl_desc *ioadl;
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        int ioadl_count = 0;
+
+        if (ioarcb->add_cmd_param_length)
+                ioadl_count = DIV_ROUND_UP(ioarcb->add_cmd_param_length, 16);
+        ioarcb->ioadl_length =
+                sizeof(struct pmcraid_ioadl_desc) * sgcount;
+
+        if ((sgcount + ioadl_count) > (ARRAY_SIZE(ioarcb->add_data.u.ioadl))) {
+                /* external ioadls start at offset 0x80 from control_block
+                 * structure, re-using 24 out of 27 ioadls part of IOARCB.
+                 * It is necessary to indicate to firmware that driver is
+                 * using ioadls to be treated as external to IOARCB.
+                 */
+                ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
+                ioarcb->ioadl_bus_addr =
+                        cpu_to_le64((cmd->ioa_cb_bus_addr) +
+                                offsetof(struct pmcraid_ioarcb,
+                                        add_data.u.ioadl[3]));
+                ioadl = &ioarcb->add_data.u.ioadl[3];
+        } else {
+                ioarcb->ioadl_bus_addr =
+                        cpu_to_le64((cmd->ioa_cb_bus_addr) +
+                                offsetof(struct pmcraid_ioarcb,
+                                        add_data.u.ioadl[ioadl_count]));
+
+                ioadl = &ioarcb->add_data.u.ioadl[ioadl_count];
+                ioarcb->ioarcb_bus_addr |=
+                                DIV_ROUND_CLOSEST(sgcount + ioadl_count, 8);
+        }
+
+        return ioadl;
+}
+
+/**
+ * pmcraid_build_ioadl - Build a scatter/gather list and map the buffer
+ * @pinstance: pointer to adapter instance structure
+ * @cmd: pmcraid command struct
+ *
+ * This function is invoked by queuecommand entry point while sending a command
+ * to firmware. This builds ioadl descriptors and sets up ioarcb fields.
+ *
+ * Return value:
+ *      0 on success or -1 on failure
+ */
+static int pmcraid_build_ioadl(
+        struct pmcraid_instance *pinstance,
+        struct pmcraid_cmd *cmd
+)
+{
+        int i, nseg;
+        struct scatterlist *sglist;
+
+        struct scsi_cmnd *scsi_cmd = cmd->scsi_cmd;
+        struct pmcraid_ioarcb *ioarcb = &(cmd->ioa_cb->ioarcb);
+        struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
+
+        u32 length = scsi_bufflen(scsi_cmd);
+
+        if (!length)
+                return 0;
+
+        nseg = scsi_dma_map(scsi_cmd);
+
+        if (nseg < 0) {
+                dev_err(&pinstance->pdev->dev, "scsi_map_dma failed!\n");
+                return -1;
+        } else if (nseg > PMCRAID_MAX_IOADLS) {
+                scsi_dma_unmap(scsi_cmd);
+                dev_err(&pinstance->pdev->dev,
+                        "sg count is (%d) more than allowed!\n", nseg);
+                return -1;
+        }
+
+        /* Initialize IOARCB data transfer length fields */
+        if (scsi_cmd->sc_data_direction == DMA_TO_DEVICE)
+                ioarcb->request_flags0 |= TRANSFER_DIR_WRITE;
+
+        ioarcb->request_flags0 |= NO_LINK_DESCS;
+        ioarcb->data_transfer_length = cpu_to_le32(length);
+        ioadl = pmcraid_init_ioadls(cmd, nseg);
+
+        /* Initialize IOADL descriptor addresses */
+        scsi_for_each_sg(scsi_cmd, sglist, nseg, i) {
+                ioadl[i].data_len = cpu_to_le32(sg_dma_len(sglist));
+                ioadl[i].address = cpu_to_le64(sg_dma_address(sglist));
+                ioadl[i].flags = 0;
+        }
+        /* setup last descriptor */
+        ioadl[i - 1].flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
+
+        return 0;
+}
+
+/**
+ * pmcraid_free_sglist - Frees an allocated SG buffer list
+ * @sglist: scatter/gather list pointer
+ *
+ * Free a DMA'able memory previously allocated with pmcraid_alloc_sglist
+ *
+ * Return value:
+ *      none
+ */
+static void pmcraid_free_sglist(struct pmcraid_sglist *sglist)
+{
+        int i;
+
+        for (i = 0; i < sglist->num_sg; i++)
+                __free_pages(sg_page(&(sglist->scatterlist[i])),
+                             sglist->order);
+
+        kfree(sglist);
+}
+
+/**
+ * pmcraid_alloc_sglist - Allocates memory for a SG list
+ * @buflen: buffer length
+ *
+ * Allocates a DMA'able buffer in chunks and assembles a scatter/gather
+ * list.
+ *
+ * Return value
+ *      pointer to sglist / NULL on failure
+ */
+static struct pmcraid_sglist *pmcraid_alloc_sglist(int buflen)
+{
+        struct pmcraid_sglist *sglist;
+        struct scatterlist *scatterlist;
+        struct page *page;
+        int num_elem, i, j;
+        int sg_size;
+        int order;
+        int bsize_elem;
+
+        sg_size = buflen / (PMCRAID_MAX_IOADLS - 1);
+        order = (sg_size > 0) ? get_order(sg_size) : 0;
+        bsize_elem = PAGE_SIZE * (1 << order);
+
+        /* Determine the actual number of sg entries needed */
+        if (buflen % bsize_elem)
+                num_elem = (buflen / bsize_elem) + 1;
+        else
+                num_elem = buflen / bsize_elem;
+
+        /* Allocate a scatter/gather list for the DMA */
+        sglist = kzalloc(sizeof(struct pmcraid_sglist) +
+                         (sizeof(struct scatterlist) * (num_elem - 1)),
+                         GFP_KERNEL);
+
+        if (sglist == NULL)
+                return NULL;
+
+        scatterlist = sglist->scatterlist;
+        sg_init_table(scatterlist, num_elem);
+        sglist->order = order;
+        sglist->num_sg = num_elem;
+        sg_size = buflen;
+
+        for (i = 0; i < num_elem; i++) {
+                page = alloc_pages(GFP_KERNEL|GFP_DMA, order);
+                if (!page) {
+                        for (j = i - 1; j >= 0; j--)
+                                __free_pages(sg_page(&scatterlist[j]), order);
+                        kfree(sglist);
+                        return NULL;
+                }
+
+                sg_set_page(&scatterlist[i], page,
+                        sg_size < bsize_elem ? sg_size : bsize_elem, 0);
+                sg_size -= bsize_elem;
+        }
+
+        return sglist;
+}
+
+/**
+ * pmcraid_copy_sglist - Copy user buffer to kernel buffer's SG list
+ * @sglist: scatter/gather list pointer
+ * @buffer: buffer pointer
+ * @len: buffer length
+ * @direction: data transfer direction
+ *
+ * Copy a user buffer into a buffer allocated by pmcraid_alloc_sglist
+ *
+ * Return value:
+ * 0 on success / other on failure
+ */
+static int pmcraid_copy_sglist(
+        struct pmcraid_sglist *sglist,
+        unsigned long buffer,
+        u32 len,
+        int direction
+)
+{
+        struct scatterlist *scatterlist;
+        void *kaddr;
+        int bsize_elem;
+        int i;
+        int rc = 0;
+
+        /* Determine the actual number of bytes per element */
+        bsize_elem = PAGE_SIZE * (1 << sglist->order);
+
+        scatterlist = sglist->scatterlist;
+
+        for (i = 0; i < (len / bsize_elem); i++, buffer += bsize_elem) {
+                struct page *page = sg_page(&scatterlist[i]);
+
+                kaddr = kmap(page);
+                if (direction == DMA_TO_DEVICE)
+                        rc = __copy_from_user(kaddr,
+                                              (void *)buffer,
+                                              bsize_elem);
+                else
+                        rc = __copy_to_user((void *)buffer, kaddr, bsize_elem);
+
+                kunmap(page);
+
+                if (rc) {
+                        pmcraid_err("failed to copy user data into sg list\n");
+                        return -EFAULT;
+                }
+
+                scatterlist[i].length = bsize_elem;
+        }
+
+        if (len % bsize_elem) {
+                struct page *page = sg_page(&scatterlist[i]);
+
+                kaddr = kmap(page);
+
+                if (direction == DMA_TO_DEVICE)
+                        rc = __copy_from_user(kaddr,
+                                              (void *)buffer,
+                                              len % bsize_elem);
+                else
+                        rc = __copy_to_user((void *)buffer,
+                                            kaddr,
+                                            len % bsize_elem);
+
+                kunmap(page);
+
+                scatterlist[i].length = len % bsize_elem;
+        }
+
+        if (rc) {
+                pmcraid_err("failed to copy user data into sg list\n");
+                rc = -EFAULT;
+        }
+
+        return rc;
+}
+
+/**
+ * pmcraid_queuecommand - Queue a mid-layer request
+ * @scsi_cmd: scsi command struct
+ * @done: done function
+ *
+ * This function queues a request generated by the mid-layer. Midlayer calls
+ * this routine within host->lock. Some of the functions called by queuecommand
+ * would use cmd block queue locks (free_pool_lock and pending_pool_lock)
+ *
+ * Return value:
+ *        0 on success
+ *        SCSI_MLQUEUE_DEVICE_BUSY if device is busy
+ *        SCSI_MLQUEUE_HOST_BUSY if host is busy
+ */
+static int pmcraid_queuecommand(
+        struct scsi_cmnd *scsi_cmd,
+        void (*done) (struct scsi_cmnd *)
+)
+{
+        struct pmcraid_instance *pinstance;
+        struct pmcraid_resource_entry *res;
+        struct pmcraid_ioarcb *ioarcb;
+        struct pmcraid_cmd *cmd;
+        int rc = 0;
+
+        pinstance =
+                (struct pmcraid_instance *)scsi_cmd->device->host->hostdata;
+
+        scsi_cmd->scsi_done = done;
+        res = scsi_cmd->device->hostdata;
+        scsi_cmd->result = (DID_OK << 16);
+
+        /* if adapter is marked as dead, set result to DID_NO_CONNECT complete
+         * the command
+         */
+        if (pinstance->ioa_state == IOA_STATE_DEAD) {
+                pmcraid_info("IOA is dead, but queuecommand is scheduled\n");
+                scsi_cmd->result = (DID_NO_CONNECT << 16);
+                scsi_cmd->scsi_done(scsi_cmd);
+                return 0;
+        }
+
+        /* If IOA reset is in progress, can't queue the commands */
+        if (pinstance->ioa_reset_in_progress)
+                return SCSI_MLQUEUE_HOST_BUSY;
+
+        /* initialize the command and IOARCB to be sent to IOA */
+        cmd = pmcraid_get_free_cmd(pinstance);
+
+        if (cmd == NULL) {
+                pmcraid_err("free command block is not available\n");
+                return SCSI_MLQUEUE_HOST_BUSY;
+        }
+
+        cmd->scsi_cmd = scsi_cmd;
+        ioarcb = &(cmd->ioa_cb->ioarcb);
+        memcpy(ioarcb->cdb, scsi_cmd->cmnd, scsi_cmd->cmd_len);
+        ioarcb->resource_handle = res->cfg_entry.resource_handle;
+        ioarcb->request_type = REQ_TYPE_SCSI;
+
+        cmd->cmd_done = pmcraid_io_done;
+
+        if (RES_IS_GSCSI(res->cfg_entry) || RES_IS_VSET(res->cfg_entry)) {
+                if (scsi_cmd->underflow == 0)
+                        ioarcb->request_flags0 |= INHIBIT_UL_CHECK;
+
+                if (res->sync_reqd) {
+                        ioarcb->request_flags0 |= SYNC_COMPLETE;
+                        res->sync_reqd = 0;
+                }
+
+                ioarcb->request_flags0 |= NO_LINK_DESCS;
+                ioarcb->request_flags1 |= pmcraid_task_attributes(scsi_cmd);
+
+                if (RES_IS_GSCSI(res->cfg_entry))
+                        ioarcb->request_flags1 |= DELAY_AFTER_RESET;
+        }
+
+        rc = pmcraid_build_ioadl(pinstance, cmd);
+
+        pmcraid_info("command (%d) CDB[0] = %x for %x:%x:%x:%x\n",
+                     le32_to_cpu(ioarcb->response_handle) >> 2,
+                     scsi_cmd->cmnd[0], pinstance->host->unique_id,
+                     RES_IS_VSET(res->cfg_entry) ? PMCRAID_VSET_BUS_ID :
+                        PMCRAID_PHYS_BUS_ID,
+                     RES_IS_VSET(res->cfg_entry) ?
+                        res->cfg_entry.unique_flags1 :
+                        RES_TARGET(res->cfg_entry.resource_address),
+                     RES_LUN(res->cfg_entry.resource_address));
+
+        if (likely(rc == 0)) {
+                _pmcraid_fire_command(cmd);
+        } else {
+                pmcraid_err("queuecommand could not build ioadl\n");
+                pmcraid_return_cmd(cmd);
+                rc = SCSI_MLQUEUE_HOST_BUSY;
+        }
+
+        return rc;
+}
+
+/**
+ * pmcraid_open -char node "open" entry, allowed only users with admin access
+ */
+static int pmcraid_chr_open(struct inode *inode, struct file *filep)
+{
+        struct pmcraid_instance *pinstance;
+
+        if (!capable(CAP_SYS_ADMIN))
+                return -EACCES;
+
+        /* Populate adapter instance * pointer for use by ioctl */
+        pinstance = container_of(inode->i_cdev, struct pmcraid_instance, cdev);
+        filep->private_data = pinstance;
+
+        return 0;
+}
+
+/**
+ * pmcraid_release - char node "release" entry point
+ */
+static int pmcraid_chr_release(struct inode *inode, struct file *filep)
+{
+        struct pmcraid_instance *pinstance =
+                ((struct pmcraid_instance *)filep->private_data);
+
+        filep->private_data = NULL;
+        fasync_helper(-1, filep, 0, &pinstance->aen_queue);
+
+        return 0;
+}
+
+/**
+ * pmcraid_fasync - Async notifier registration from applications
+ *
+ * This function adds the calling process to a driver global queue. When an
+ * event occurs, SIGIO will be sent to all processes in this queue.
+ */
+static int pmcraid_chr_fasync(int fd, struct file *filep, int mode)
+{
+        struct pmcraid_instance *pinstance;
+        int rc;
+
+        pinstance = (struct pmcraid_instance *)filep->private_data;
+        mutex_lock(&pinstance->aen_queue_lock);
+        rc = fasync_helper(fd, filep, mode, &pinstance->aen_queue);
+        mutex_unlock(&pinstance->aen_queue_lock);
+
+        return rc;
+}
+
+
+/**
+ * pmcraid_build_passthrough_ioadls - builds SG elements for passthrough
+ * commands sent over IOCTL interface
+ *
+ * @cmd       : pointer to struct pmcraid_cmd
+ * @buflen    : length of the request buffer
+ * @direction : data transfer direction
+ *
+ * Return value
+ *  0 on sucess, non-zero error code on failure
+ */
+static int pmcraid_build_passthrough_ioadls(
+        struct pmcraid_cmd *cmd,
+        int buflen,
+        int direction
+)
+{
+        struct pmcraid_sglist *sglist = NULL;
+        struct scatterlist *sg = NULL;
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        struct pmcraid_ioadl_desc *ioadl;
+        int i;
+
+        sglist = pmcraid_alloc_sglist(buflen);
+
+        if (!sglist) {
+                pmcraid_err("can't allocate memory for passthrough SGls\n");
+                return -ENOMEM;
+        }
+
+        sglist->num_dma_sg = pci_map_sg(cmd->drv_inst->pdev,
+                                        sglist->scatterlist,
+                                        sglist->num_sg, direction);
+
+        if (!sglist->num_dma_sg || sglist->num_dma_sg > PMCRAID_MAX_IOADLS) {
+                dev_err(&cmd->drv_inst->pdev->dev,
+                        "Failed to map passthrough buffer!\n");
+                pmcraid_free_sglist(sglist);
+                return -EIO;
+        }
+
+        cmd->sglist = sglist;
+        ioarcb->request_flags0 |= NO_LINK_DESCS;
+
+        ioadl = pmcraid_init_ioadls(cmd, sglist->num_dma_sg);
+
+        /* Initialize IOADL descriptor addresses */
+        for_each_sg(sglist->scatterlist, sg, sglist->num_dma_sg, i) {
+                ioadl[i].data_len = cpu_to_le32(sg_dma_len(sg));
+                ioadl[i].address = cpu_to_le64(sg_dma_address(sg));
+                ioadl[i].flags = 0;
+        }
+
+        /* setup the last descriptor */
+        ioadl[i - 1].flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
+
+        return 0;
+}
+
+
+/**
+ * pmcraid_release_passthrough_ioadls - release passthrough ioadls
+ *
+ * @cmd: pointer to struct pmcraid_cmd for which ioadls were allocated
+ * @buflen: size of the request buffer
+ * @direction: data transfer direction
+ *
+ * Return value
+ *  0 on sucess, non-zero error code on failure
+ */
+static void pmcraid_release_passthrough_ioadls(
+        struct pmcraid_cmd *cmd,
+        int buflen,
+        int direction
+)
+{
+        struct pmcraid_sglist *sglist = cmd->sglist;
+
+        if (buflen > 0) {
+                pci_unmap_sg(cmd->drv_inst->pdev,
+                             sglist->scatterlist,
+                             sglist->num_sg,
+                             direction);
+                pmcraid_free_sglist(sglist);
+                cmd->sglist = NULL;
+        }
+}
+
+/**
+ * pmcraid_ioctl_passthrough - handling passthrough IOCTL commands
+ *
+ * @pinstance: pointer to adapter instance structure
+ * @cmd: ioctl code
+ * @arg: pointer to pmcraid_passthrough_buffer user buffer
+ *
+ * Return value
+ *  0 on sucess, non-zero error code on failure
+ */
+static long pmcraid_ioctl_passthrough(
+        struct pmcraid_instance *pinstance,
+        unsigned int ioctl_cmd,
+        unsigned int buflen,
+        unsigned long arg
+)
+{
+        struct pmcraid_passthrough_ioctl_buffer *buffer;
+        struct pmcraid_ioarcb *ioarcb;
+        struct pmcraid_cmd *cmd;
+        struct pmcraid_cmd *cancel_cmd;
+        unsigned long request_buffer;
+        unsigned long request_offset;
+        unsigned long lock_flags;
+        int request_size;
+        int buffer_size;
+        u8 access, direction;
+        int rc = 0;
+
+        /* If IOA reset is in progress, wait 10 secs for reset to complete */
+        if (pinstance->ioa_reset_in_progress) {
+                rc = wait_event_interruptible_timeout(
+                                pinstance->reset_wait_q,
+                                !pinstance->ioa_reset_in_progress,
+                                msecs_to_jiffies(10000));
+
+                if (!rc)
+                        return -ETIMEDOUT;
+                else if (rc < 0)
+                        return -ERESTARTSYS;
+        }
+
+        /* If adapter is not in operational state, return error */
+        if (pinstance->ioa_state != IOA_STATE_OPERATIONAL) {
+                pmcraid_err("IOA is not operational\n");
+                return -ENOTTY;
+        }
+
+        buffer_size = sizeof(struct pmcraid_passthrough_ioctl_buffer);
+        buffer = kmalloc(buffer_size, GFP_KERNEL);
+
+        if (!buffer) {
+                pmcraid_err("no memory for passthrough buffer\n");
+                return -ENOMEM;
+        }
+
+        request_offset =
+            offsetof(struct pmcraid_passthrough_ioctl_buffer, request_buffer);
+
+        request_buffer = arg + request_offset;
+
+        rc = __copy_from_user(buffer,
+                             (struct pmcraid_passthrough_ioctl_buffer *) arg,
+                             sizeof(struct pmcraid_passthrough_ioctl_buffer));
+        if (rc) {
+                pmcraid_err("ioctl: can't copy passthrough buffer\n");
+                rc = -EFAULT;
+                goto out_free_buffer;
+        }
+
+        request_size = buffer->ioarcb.data_transfer_length;
+
+        if (buffer->ioarcb.request_flags0 & TRANSFER_DIR_WRITE) {
+                access = VERIFY_READ;
+                direction = DMA_TO_DEVICE;
+        } else {
+                access = VERIFY_WRITE;
+                direction = DMA_FROM_DEVICE;
+        }
+
+        if (request_size > 0) {
+                rc = access_ok(access, arg, request_offset + request_size);
+
+                if (!rc) {
+                        rc = -EFAULT;
+                        goto out_free_buffer;
+                }
+        }
+
+        /* check if we have any additional command parameters */
+        if (buffer->ioarcb.add_cmd_param_length > PMCRAID_ADD_CMD_PARAM_LEN) {
+                rc = -EINVAL;
+                goto out_free_buffer;
+        }
+
+        cmd = pmcraid_get_free_cmd(pinstance);
+
+        if (!cmd) {
+                pmcraid_err("free command block is not available\n");
+                rc = -ENOMEM;
+                goto out_free_buffer;
+        }
+
+        cmd->scsi_cmd = NULL;
+        ioarcb = &(cmd->ioa_cb->ioarcb);
+
+        /* Copy the user-provided IOARCB stuff field by field */
+        ioarcb->resource_handle = buffer->ioarcb.resource_handle;
+        ioarcb->data_transfer_length = buffer->ioarcb.data_transfer_length;
+        ioarcb->cmd_timeout = buffer->ioarcb.cmd_timeout;
+        ioarcb->request_type = buffer->ioarcb.request_type;
+        ioarcb->request_flags0 = buffer->ioarcb.request_flags0;
+        ioarcb->request_flags1 = buffer->ioarcb.request_flags1;
+        memcpy(ioarcb->cdb, buffer->ioarcb.cdb, PMCRAID_MAX_CDB_LEN);
+
+        if (buffer->ioarcb.add_cmd_param_length) {
+                ioarcb->add_cmd_param_length =
+                        buffer->ioarcb.add_cmd_param_length;
+                ioarcb->add_cmd_param_offset =
+                        buffer->ioarcb.add_cmd_param_offset;
+                memcpy(ioarcb->add_data.u.add_cmd_params,
+                        buffer->ioarcb.add_data.u.add_cmd_params,
+                        buffer->ioarcb.add_cmd_param_length);
+        }
+
+        if (request_size) {
+                rc = pmcraid_build_passthrough_ioadls(cmd,
+                                                      request_size,
+                                                      direction);
+                if (rc) {
+                        pmcraid_err("couldn't build passthrough ioadls\n");
+                        goto out_free_buffer;
+                }
+        }
+
+        /* If data is being written into the device, copy the data from user
+         * buffers
+         */
+        if (direction == DMA_TO_DEVICE && request_size > 0) {
+                rc = pmcraid_copy_sglist(cmd->sglist,
+                                         request_buffer,
+                                         request_size,
+                                         direction);
+                if (rc) {
+                        pmcraid_err("failed to copy user buffer\n");
+                        goto out_free_sglist;
+                }
+        }
+
+        /* passthrough ioctl is a blocking command so, put the user to sleep
+         * until timeout. Note that a timeout value of 0 means, do timeout.
+         */
+        cmd->cmd_done = pmcraid_internal_done;
+        init_completion(&cmd->wait_for_completion);
+        cmd->completion_req = 1;
+
+        pmcraid_info("command(%d) (CDB[0] = %x) for %x\n",
+                     le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle) >> 2,
+                     cmd->ioa_cb->ioarcb.cdb[0],
+                     le32_to_cpu(cmd->ioa_cb->ioarcb.resource_handle));
+
+        spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+        _pmcraid_fire_command(cmd);
+        spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+
+        /* If command timeout is specified put caller to wait till that time,
+         * otherwise it would be blocking wait. If command gets timed out, it
+         * will be aborted.
+         */
+        if (buffer->ioarcb.cmd_timeout == 0) {
+                wait_for_completion(&cmd->wait_for_completion);
+        } else if (!wait_for_completion_timeout(
+                        &cmd->wait_for_completion,
+                        msecs_to_jiffies(buffer->ioarcb.cmd_timeout * 1000))) {
+
+                pmcraid_info("aborting cmd %d (CDB[0] = %x) due to timeout\n",
+                        le32_to_cpu(cmd->ioa_cb->ioarcb.response_handle >> 2),
+                        cmd->ioa_cb->ioarcb.cdb[0]);
+
+                rc = -ETIMEDOUT;
+                spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+                cancel_cmd = pmcraid_abort_cmd(cmd);
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+
+                if (cancel_cmd) {
+                        wait_for_completion(&cancel_cmd->wait_for_completion);
+                        pmcraid_return_cmd(cancel_cmd);
+                }
+
+                goto out_free_sglist;
+        }
+
+        /* If the command failed for any reason, copy entire IOASA buffer and
+         * return IOCTL success. If copying IOASA to user-buffer fails, return
+         * EFAULT
+         */
+        if (le32_to_cpu(cmd->ioa_cb->ioasa.ioasc)) {
+
+                void *ioasa =
+                    (void *)(arg +
+                    offsetof(struct pmcraid_passthrough_ioctl_buffer, ioasa));
+
+                pmcraid_info("command failed with %x\n",
+                             le32_to_cpu(cmd->ioa_cb->ioasa.ioasc));
+                if (copy_to_user(ioasa, &cmd->ioa_cb->ioasa,
+                                 sizeof(struct pmcraid_ioasa))) {
+                        pmcraid_err("failed to copy ioasa buffer to user\n");
+                        rc = -EFAULT;
+                }
+        }
+        /* If the data transfer was from device, copy the data onto user
+         * buffers
+         */
+        else if (direction == DMA_FROM_DEVICE && request_size > 0) {
+                rc = pmcraid_copy_sglist(cmd->sglist,
+                                         request_buffer,
+                                         request_size,
+                                         direction);
+                if (rc) {
+                        pmcraid_err("failed to copy user buffer\n");
+                        rc = -EFAULT;
+                }
+        }
+
+out_free_sglist:
+        pmcraid_release_passthrough_ioadls(cmd, request_size, direction);
+        pmcraid_return_cmd(cmd);
+
+out_free_buffer:
+        kfree(buffer);
+
+        return rc;
+}
+
+
+
+
+/**
+ * pmcraid_ioctl_driver - ioctl handler for commands handled by driver itself
+ *
+ * @pinstance: pointer to adapter instance structure
+ * @cmd: ioctl command passed in
+ * @buflen: length of user_buffer
+ * @user_buffer: user buffer pointer
+ *
+ * Return Value
+ *   0 in case of success, otherwise appropriate error code
+ */
+static long pmcraid_ioctl_driver(
+        struct pmcraid_instance *pinstance,
+        unsigned int cmd,
+        unsigned int buflen,
+        void __user *user_buffer
+)
+{
+        int rc = -ENOSYS;
+
+        if (!access_ok(VERIFY_READ, user_buffer, _IOC_SIZE(cmd))) {
+                pmcraid_err("ioctl_driver: access fault in request buffer \n");
+                return -EFAULT;
+        }
+
+        switch (cmd) {
+        case PMCRAID_IOCTL_RESET_ADAPTER:
+                pmcraid_reset_bringup(pinstance);
+                rc = 0;
+                break;
+
+        default:
+                break;
+        }
+
+        return rc;
+}
+
+/**
+ * pmcraid_check_ioctl_buffer - check for proper access to user buffer
+ *
+ * @cmd: ioctl command
+ * @arg: user buffer
+ * @hdr: pointer to kernel memory for pmcraid_ioctl_header
+ *
+ * Return Value
+ *      negetive error code if there are access issues, otherwise zero.
+ *      Upon success, returns ioctl header copied out of user buffer.
+ */
+
+static int pmcraid_check_ioctl_buffer(
+        int cmd,
+        void __user *arg,
+        struct pmcraid_ioctl_header *hdr
+)
+{
+        int rc = 0;
+        int access = VERIFY_READ;
+
+        if (copy_from_user(hdr, arg, sizeof(struct pmcraid_ioctl_header))) {
+                pmcraid_err("couldn't copy ioctl header from user buffer\n");
+                return -EFAULT;
+        }
+
+        /* check for valid driver signature */
+        rc = memcmp(hdr->signature,
+                    PMCRAID_IOCTL_SIGNATURE,
+                    sizeof(hdr->signature));
+        if (rc) {
+                pmcraid_err("signature verification failed\n");
+                return -EINVAL;
+        }
+
+        /* buffer length can't be negetive */
+        if (hdr->buffer_length < 0) {
+                pmcraid_err("ioctl: invalid buffer length specified\n");
+                return -EINVAL;
+        }
+
+        /* check for appropriate buffer access */
+        if ((_IOC_DIR(cmd) & _IOC_READ) == _IOC_READ)
+                access = VERIFY_WRITE;
+
+        rc = access_ok(access,
+                       (arg + sizeof(struct pmcraid_ioctl_header)),
+                       hdr->buffer_length);
+        if (!rc) {
+                pmcraid_err("access failed for user buffer of size %d\n",
+                             hdr->buffer_length);
+                return -EFAULT;
+        }
+
+        return 0;
+}
+
+/**
+ *  pmcraid_ioctl - char node ioctl entry point
+ */
+static long pmcraid_chr_ioctl(
+        struct file *filep,
+        unsigned int cmd,
+        unsigned long arg
+)
+{
+        struct pmcraid_instance *pinstance = NULL;
+        struct pmcraid_ioctl_header *hdr = NULL;
+        int retval = -ENOTTY;
+
+        hdr = kmalloc(GFP_KERNEL, sizeof(struct pmcraid_ioctl_header));
+
+        if (!hdr) {
+                pmcraid_err("faile to allocate memory for ioctl header\n");
+                return -ENOMEM;
+        }
+
+        retval = pmcraid_check_ioctl_buffer(cmd, (void *)arg, hdr);
+
+        if (retval) {
+                pmcraid_info("chr_ioctl: header check failed\n");
+                kfree(hdr);
+                return retval;
+        }
+
+        pinstance = (struct pmcraid_instance *)filep->private_data;
+
+        if (!pinstance) {
+                pmcraid_info("adapter instance is not found\n");
+                kfree(hdr);
+                return -ENOTTY;
+        }
+
+        switch (_IOC_TYPE(cmd)) {
+
+        case PMCRAID_PASSTHROUGH_IOCTL:
+                /* If ioctl code is to download microcode, we need to block
+                 * mid-layer requests.
+                 */
+                if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
+                        scsi_block_requests(pinstance->host);
+
+                retval = pmcraid_ioctl_passthrough(pinstance,
+                                                   cmd,
+                                                   hdr->buffer_length,
+                                                   arg);
+
+                if (cmd == PMCRAID_IOCTL_DOWNLOAD_MICROCODE)
+                        scsi_unblock_requests(pinstance->host);
+                break;
+
+        case PMCRAID_DRIVER_IOCTL:
+                arg += sizeof(struct pmcraid_ioctl_header);
+                retval = pmcraid_ioctl_driver(pinstance,
+                                              cmd,
+                                              hdr->buffer_length,
+                                              (void __user *)arg);
+                break;
+
+        default:
+                retval = -ENOTTY;
+                break;
+        }
+
+        kfree(hdr);
+
+        return retval;
+}
+
+/**
+ * File operations structure for management interface
+ */
+static const struct file_operations pmcraid_fops = {
+        .owner = THIS_MODULE,
+        .open = pmcraid_chr_open,
+        .release = pmcraid_chr_release,
+        .fasync = pmcraid_chr_fasync,
+        .unlocked_ioctl = pmcraid_chr_ioctl,
+#ifdef CONFIG_COMPAT
+        .compat_ioctl = pmcraid_chr_ioctl,
+#endif
+};
+
+
+
+
+/**
+ * pmcraid_show_log_level - Display adapter's error logging level
+ * @dev: class device struct
+ * @buf: buffer
+ *
+ * Return value:
+ *  number of bytes printed to buffer
+ */
+static ssize_t pmcraid_show_log_level(
+        struct device *dev,
+        struct device_attribute *attr,
+        char *buf)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct pmcraid_instance *pinstance =
+                (struct pmcraid_instance *)shost->hostdata;
+        return snprintf(buf, PAGE_SIZE, "%d\n", pinstance->current_log_level);
+}
+
+/**
+ * pmcraid_store_log_level - Change the adapter's error logging level
+ * @dev: class device struct
+ * @buf: buffer
+ * @count: not used
+ *
+ * Return value:
+ *  number of bytes printed to buffer
+ */
+static ssize_t pmcraid_store_log_level(
+        struct device *dev,
+        struct device_attribute *attr,
+        const char *buf,
+        size_t count
+)
+{
+        struct Scsi_Host *shost;
+        struct pmcraid_instance *pinstance;
+        unsigned long val;
+
+        if (strict_strtoul(buf, 10, &val))
+                return -EINVAL;
+        /* log-level should be from 0 to 2 */
+        if (val > 2)
+                return -EINVAL;
+
+        shost = class_to_shost(dev);
+        pinstance = (struct pmcraid_instance *)shost->hostdata;
+        pinstance->current_log_level = val;
+
+        return strlen(buf);
+}
+
+static struct device_attribute pmcraid_log_level_attr = {
+        .attr = {
+                 .name = "log_level",
+                 .mode = S_IRUGO | S_IWUSR,
+                 },
+        .show = pmcraid_show_log_level,
+        .store = pmcraid_store_log_level,
+};
+
+/**
+ * pmcraid_show_drv_version - Display driver version
+ * @dev: class device struct
+ * @buf: buffer
+ *
+ * Return value:
+ *  number of bytes printed to buffer
+ */
+static ssize_t pmcraid_show_drv_version(
+        struct device *dev,
+        struct device_attribute *attr,
+        char *buf
+)
+{
+        return snprintf(buf, PAGE_SIZE, "version: %s, build date: %s\n",
+                        PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
+}
+
+static struct device_attribute pmcraid_driver_version_attr = {
+        .attr = {
+                 .name = "drv_version",
+                 .mode = S_IRUGO,
+                 },
+        .show = pmcraid_show_drv_version,
+};
+
+/**
+ * pmcraid_show_io_adapter_id - Display driver assigned adapter id
+ * @dev: class device struct
+ * @buf: buffer
+ *
+ * Return value:
+ *  number of bytes printed to buffer
+ */
+static ssize_t pmcraid_show_adapter_id(
+        struct device *dev,
+        struct device_attribute *attr,
+        char *buf
+)
+{
+        struct Scsi_Host *shost = class_to_shost(dev);
+        struct pmcraid_instance *pinstance =
+                (struct pmcraid_instance *)shost->hostdata;
+        u32 adapter_id = (pinstance->pdev->bus->number << 8) |
+                pinstance->pdev->devfn;
+        u32 aen_group = pmcraid_event_family.id;
+
+        return snprintf(buf, PAGE_SIZE,
+                        "adapter id: %d\nminor: %d\naen group: %d\n",
+                        adapter_id, MINOR(pinstance->cdev.dev), aen_group);
+}
+
+static struct device_attribute pmcraid_adapter_id_attr = {
+        .attr = {
+                 .name = "adapter_id",
+                 .mode = S_IRUGO | S_IWUSR,
+                 },
+        .show = pmcraid_show_adapter_id,
+};
+
+static struct device_attribute *pmcraid_host_attrs[] = {
+        &pmcraid_log_level_attr,
+        &pmcraid_driver_version_attr,
+        &pmcraid_adapter_id_attr,
+        NULL,
+};
+
+
+/* host template structure for pmcraid driver */
+static struct scsi_host_template pmcraid_host_template = {
+        .module = THIS_MODULE,
+        .name = PMCRAID_DRIVER_NAME,
+        .queuecommand = pmcraid_queuecommand,
+        .eh_abort_handler = pmcraid_eh_abort_handler,
+        .eh_bus_reset_handler = pmcraid_eh_bus_reset_handler,
+        .eh_target_reset_handler = pmcraid_eh_target_reset_handler,
+        .eh_device_reset_handler = pmcraid_eh_device_reset_handler,
+        .eh_host_reset_handler = pmcraid_eh_host_reset_handler,
+
+        .slave_alloc = pmcraid_slave_alloc,
+        .slave_configure = pmcraid_slave_configure,
+        .slave_destroy = pmcraid_slave_destroy,
+        .change_queue_depth = pmcraid_change_queue_depth,
+        .change_queue_type  = pmcraid_change_queue_type,
+        .can_queue = PMCRAID_MAX_IO_CMD,
+        .this_id = -1,
+        .sg_tablesize = PMCRAID_MAX_IOADLS,
+        .max_sectors = PMCRAID_IOA_MAX_SECTORS,
+        .cmd_per_lun = PMCRAID_MAX_CMD_PER_LUN,
+        .use_clustering = ENABLE_CLUSTERING,
+        .shost_attrs = pmcraid_host_attrs,
+        .proc_name = PMCRAID_DRIVER_NAME
+};
+
+/**
+ * pmcraid_isr_common - Common interrupt handler routine
+ *
+ * @pinstance: pointer to adapter instance
+ * @intrs: active interrupts (contents of ioa_host_interrupt register)
+ * @hrrq_id: Host RRQ index
+ *
+ * Return Value
+ *      none
+ */
+static void pmcraid_isr_common(
+        struct pmcraid_instance *pinstance,
+        u32 intrs,
+        int hrrq_id
+)
+{
+        u32 intrs_clear =
+                (intrs & INTRS_CRITICAL_OP_IN_PROGRESS) ? intrs
+                                                        : INTRS_HRRQ_VALID;
+        iowrite32(intrs_clear,
+                  pinstance->int_regs.ioa_host_interrupt_clr_reg);
+        intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
+
+        /* hrrq valid bit was set, schedule tasklet to handle the response */
+        if (intrs_clear == INTRS_HRRQ_VALID)
+                tasklet_schedule(&(pinstance->isr_tasklet[hrrq_id]));
+}
+
+/**
+ * pmcraid_isr  - implements interrupt handling routine
+ *
+ * @irq: interrupt vector number
+ * @dev_id: pointer hrrq_vector
+ *
+ * Return Value
+ *       IRQ_HANDLED if interrupt is handled or IRQ_NONE if ignored
+ */
+static irqreturn_t pmcraid_isr(int irq, void *dev_id)
+{
+        struct pmcraid_isr_param *hrrq_vector;
+        struct pmcraid_instance *pinstance;
+        unsigned long lock_flags;
+        u32 intrs;
+
+        /* In case of legacy interrupt mode where interrupts are shared across
+         * isrs, it may be possible that the current interrupt is not from IOA
+         */
+        if (!dev_id) {
+                printk(KERN_INFO "%s(): NULL host pointer\n", __func__);
+                return IRQ_NONE;
+        }
+
+        hrrq_vector = (struct pmcraid_isr_param *)dev_id;
+        pinstance = hrrq_vector->drv_inst;
+
+        /* Acquire the lock (currently host_lock) while processing interrupts.
+         * This interval is small as most of the response processing is done by
+         * tasklet without the lock.
+         */
+        spin_lock_irqsave(pinstance->host->host_lock, lock_flags);
+        intrs = pmcraid_read_interrupts(pinstance);
+
+        if (unlikely((intrs & PMCRAID_PCI_INTERRUPTS) == 0)) {
+                spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+                return IRQ_NONE;
+        }
+
+        /* Any error interrupts including unit_check, initiate IOA reset.
+         * In case of unit check indicate to reset_sequence that IOA unit
+         * checked and prepare for a dump during reset sequence
+         */
+        if (intrs & PMCRAID_ERROR_INTERRUPTS) {
+
+                if (intrs & INTRS_IOA_UNIT_CHECK)
+                        pinstance->ioa_unit_check = 1;
+
+                iowrite32(intrs,
+                          pinstance->int_regs.ioa_host_interrupt_clr_reg);
+                pmcraid_err("ISR: error interrupts: %x initiating reset\n",
+                            intrs);
+                intrs = ioread32(pinstance->int_regs.ioa_host_interrupt_reg);
+                pmcraid_initiate_reset(pinstance);
+        } else {
+                pmcraid_isr_common(pinstance, intrs, hrrq_vector->hrrq_id);
+        }
+
+        spin_unlock_irqrestore(pinstance->host->host_lock, lock_flags);
+
+        return IRQ_HANDLED;
+}
+
+
+/**
+ * pmcraid_worker_function -  worker thread function
+ *
+ * @workp: pointer to struct work queue
+ *
+ * Return Value
+ *       None
+ */
+
+static void pmcraid_worker_function(struct work_struct *workp)
+{
+        struct pmcraid_instance *pinstance;
+        struct pmcraid_resource_entry *res;
+        struct pmcraid_resource_entry *temp;
+        struct scsi_device *sdev;
+        unsigned long lock_flags;
+        unsigned long host_lock_flags;
+        u8 bus, target, lun;
+
+        pinstance = container_of(workp, struct pmcraid_instance, worker_q);
+        /* add resources only after host is added into system */
+        if (!atomic_read(&pinstance->expose_resources))
+                return;
+
+        spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
+        list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue) {
+
+                if (res->change_detected == RES_CHANGE_DEL && res->scsi_dev) {
+                        sdev = res->scsi_dev;
+
+                        /* host_lock must be held before calling
+                         * scsi_device_get
+                         */
+                        spin_lock_irqsave(pinstance->host->host_lock,
+                                          host_lock_flags);
+                        if (!scsi_device_get(sdev)) {
+                                spin_unlock_irqrestore(
+                                                pinstance->host->host_lock,
+                                                host_lock_flags);
+                                pmcraid_info("deleting %x from midlayer\n",
+                                             res->cfg_entry.resource_address);
+                                list_move_tail(&res->queue,
+                                                &pinstance->free_res_q);
+                                spin_unlock_irqrestore(
+                                        &pinstance->resource_lock,
+                                        lock_flags);
+                                scsi_remove_device(sdev);
+                                scsi_device_put(sdev);
+                                spin_lock_irqsave(&pinstance->resource_lock,
+                                                   lock_flags);
+                                res->change_detected = 0;
+                        } else {
+                                spin_unlock_irqrestore(
+                                                pinstance->host->host_lock,
+                                                host_lock_flags);
+                        }
+                }
+        }
+
+        list_for_each_entry(res, &pinstance->used_res_q, queue) {
+
+                if (res->change_detected == RES_CHANGE_ADD) {
+
+                        if (!pmcraid_expose_resource(&res->cfg_entry))
+                                continue;
+
+                        if (RES_IS_VSET(res->cfg_entry)) {
+                                bus = PMCRAID_VSET_BUS_ID;
+                                target = res->cfg_entry.unique_flags1;
+                                lun = PMCRAID_VSET_LUN_ID;
+                        } else {
+                                bus = PMCRAID_PHYS_BUS_ID;
+                                target =
+                                     RES_TARGET(
+                                        res->cfg_entry.resource_address);
+                                lun = RES_LUN(res->cfg_entry.resource_address);
+                        }
+
+                        res->change_detected = 0;
+                        spin_unlock_irqrestore(&pinstance->resource_lock,
+                                                lock_flags);
+                        scsi_add_device(pinstance->host, bus, target, lun);
+                        spin_lock_irqsave(&pinstance->resource_lock,
+                                           lock_flags);
+                }
+        }
+
+        spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
+}
+
+/**
+ * pmcraid_tasklet_function - Tasklet function
+ *
+ * @instance: pointer to msix param structure
+ *
+ * Return Value
+ *      None
+ */
+void pmcraid_tasklet_function(unsigned long instance)
+{
+        struct pmcraid_isr_param *hrrq_vector;
+        struct pmcraid_instance *pinstance;
+        unsigned long hrrq_lock_flags;
+        unsigned long pending_lock_flags;
+        unsigned long host_lock_flags;
+        spinlock_t *lockp; /* hrrq buffer lock */
+        int id;
+        u32 intrs;
+        __le32 resp;
+
+        hrrq_vector = (struct pmcraid_isr_param *)instance;
+        pinstance = hrrq_vector->drv_inst;
+        id = hrrq_vector->hrrq_id;
+        lockp = &(pinstance->hrrq_lock[id]);
+        intrs = pmcraid_read_interrupts(pinstance);
+
+        /* If interrupts was as part of the ioa initialization, clear and mask
+         * it. Delete the timer and wakeup the reset engine to proceed with
+         * reset sequence
+         */
+        if (intrs & INTRS_TRANSITION_TO_OPERATIONAL) {
+                iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
+                        pinstance->int_regs.ioa_host_interrupt_mask_reg);
+                iowrite32(INTRS_TRANSITION_TO_OPERATIONAL,
+                        pinstance->int_regs.ioa_host_interrupt_clr_reg);
+
+                if (pinstance->reset_cmd != NULL) {
+                        del_timer(&pinstance->reset_cmd->timer);
+                        spin_lock_irqsave(pinstance->host->host_lock,
+                                          host_lock_flags);
+                        pinstance->reset_cmd->cmd_done(pinstance->reset_cmd);
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               host_lock_flags);
+                }
+                return;
+        }
+
+        /* loop through each of the commands responded by IOA. Each HRRQ buf is
+         * protected by its own lock. Traversals must be done within this lock
+         * as there may be multiple tasklets running on multiple CPUs. Note
+         * that the lock is held just for picking up the response handle and
+         * manipulating hrrq_curr/toggle_bit values.
+         */
+        spin_lock_irqsave(lockp, hrrq_lock_flags);
+
+        resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
+
+        while ((resp & HRRQ_TOGGLE_BIT) ==
+                pinstance->host_toggle_bit[id]) {
+
+                int cmd_index = resp >> 2;
+                struct pmcraid_cmd *cmd = NULL;
+
+                if (cmd_index < PMCRAID_MAX_CMD) {
+                        cmd = pinstance->cmd_list[cmd_index];
+                } else {
+                        /* In case of invalid response handle, initiate IOA
+                         * reset sequence.
+                         */
+                        spin_unlock_irqrestore(lockp, hrrq_lock_flags);
+
+                        pmcraid_err("Invalid response %d initiating reset\n",
+                                    cmd_index);
+
+                        spin_lock_irqsave(pinstance->host->host_lock,
+                                          host_lock_flags);
+                        pmcraid_initiate_reset(pinstance);
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               host_lock_flags);
+
+                        spin_lock_irqsave(lockp, hrrq_lock_flags);
+                        break;
+                }
+
+                if (pinstance->hrrq_curr[id] < pinstance->hrrq_end[id]) {
+                        pinstance->hrrq_curr[id]++;
+                } else {
+                        pinstance->hrrq_curr[id] = pinstance->hrrq_start[id];
+                        pinstance->host_toggle_bit[id] ^= 1u;
+                }
+
+                spin_unlock_irqrestore(lockp, hrrq_lock_flags);
+
+                spin_lock_irqsave(&pinstance->pending_pool_lock,
+                                   pending_lock_flags);
+                list_del(&cmd->free_list);
+                spin_unlock_irqrestore(&pinstance->pending_pool_lock,
+                                        pending_lock_flags);
+                del_timer(&cmd->timer);
+                atomic_dec(&pinstance->outstanding_cmds);
+
+                if (cmd->cmd_done == pmcraid_ioa_reset) {
+                        spin_lock_irqsave(pinstance->host->host_lock,
+                                          host_lock_flags);
+                        cmd->cmd_done(cmd);
+                        spin_unlock_irqrestore(pinstance->host->host_lock,
+                                               host_lock_flags);
+                } else if (cmd->cmd_done != NULL) {
+                        cmd->cmd_done(cmd);
+                }
+                /* loop over until we are done with all responses */
+                spin_lock_irqsave(lockp, hrrq_lock_flags);
+                resp = le32_to_cpu(*(pinstance->hrrq_curr[id]));
+        }
+
+        spin_unlock_irqrestore(lockp, hrrq_lock_flags);
+}
+
+/**
+ * pmcraid_unregister_interrupt_handler - de-register interrupts handlers
+ * @pinstance: pointer to adapter instance structure
+ *
+ * This routine un-registers registered interrupt handler and
+ * also frees irqs/vectors.
+ *
+ * Retun Value
+ *      None
+ */
+static
+void pmcraid_unregister_interrupt_handler(struct pmcraid_instance *pinstance)
+{
+        free_irq(pinstance->pdev->irq, &(pinstance->hrrq_vector[0]));
+}
+
+/**
+ * pmcraid_register_interrupt_handler - registers interrupt handler
+ * @pinstance: pointer to per-adapter instance structure
+ *
+ * Return Value
+ *      0 on success, non-zero error code otherwise.
+ */
+static int
+pmcraid_register_interrupt_handler(struct pmcraid_instance *pinstance)
+{
+        struct pci_dev *pdev = pinstance->pdev;
+
+        pinstance->hrrq_vector[0].hrrq_id = 0;
+        pinstance->hrrq_vector[0].drv_inst = pinstance;
+        pinstance->hrrq_vector[0].vector = 0;
+        pinstance->num_hrrq = 1;
+        return request_irq(pdev->irq, pmcraid_isr, IRQF_SHARED,
+                           PMCRAID_DRIVER_NAME, &pinstance->hrrq_vector[0]);
+}
+
+/**
+ * pmcraid_release_cmd_blocks - release buufers allocated for command blocks
+ * @pinstance: per adapter instance structure pointer
+ * @max_index: number of buffer blocks to release
+ *
+ * Return Value
+ *  None
+ */
+static void
+pmcraid_release_cmd_blocks(struct pmcraid_instance *pinstance, int max_index)
+{
+        int i;
+        for (i = 0; i < max_index; i++) {
+                kmem_cache_free(pinstance->cmd_cachep, pinstance->cmd_list[i]);
+                pinstance->cmd_list[i] = NULL;
+        }
+        kmem_cache_destroy(pinstance->cmd_cachep);
+        pinstance->cmd_cachep = NULL;
+}
+
+/**
+ * pmcraid_release_control_blocks - releases buffers alloced for control blocks
+ * @pinstance: pointer to per adapter instance structure
+ * @max_index: number of buffers (from 0 onwards) to release
+ *
+ * This function assumes that the command blocks for which control blocks are
+ * linked are not released.
+ *
+ * Return Value
+ *       None
+ */
+static void
+pmcraid_release_control_blocks(
+        struct pmcraid_instance *pinstance,
+        int max_index
+)
+{
+        int i;
+
+        if (pinstance->control_pool == NULL)
+                return;
+
+        for (i = 0; i < max_index; i++) {
+                pci_pool_free(pinstance->control_pool,
+                              pinstance->cmd_list[i]->ioa_cb,
+                              pinstance->cmd_list[i]->ioa_cb_bus_addr);
+                pinstance->cmd_list[i]->ioa_cb = NULL;
+                pinstance->cmd_list[i]->ioa_cb_bus_addr = 0;
+        }
+        pci_pool_destroy(pinstance->control_pool);
+        pinstance->control_pool = NULL;
+}
+
+/**
+ * pmcraid_allocate_cmd_blocks - allocate memory for cmd block structures
+ * @pinstance - pointer to per adapter instance structure
+ *
+ * Allocates memory for command blocks using kernel slab allocator.
+ *
+ * Return Value
+ *      0 in case of success; -ENOMEM in case of failure
+ */
+static int __devinit
+pmcraid_allocate_cmd_blocks(struct pmcraid_instance *pinstance)
+{
+        int i;
+
+        sprintf(pinstance->cmd_pool_name, "pmcraid_cmd_pool_%d",
+                pinstance->host->unique_id);
+
+
+        pinstance->cmd_cachep = kmem_cache_create(
+                                        pinstance->cmd_pool_name,
+                                        sizeof(struct pmcraid_cmd), 0,
+                                        SLAB_HWCACHE_ALIGN, NULL);
+        if (!pinstance->cmd_cachep)
+                return -ENOMEM;
+
+        for (i = 0; i < PMCRAID_MAX_CMD; i++) {
+                pinstance->cmd_list[i] =
+                        kmem_cache_alloc(pinstance->cmd_cachep, GFP_KERNEL);
+                if (!pinstance->cmd_list[i]) {
+                        pmcraid_release_cmd_blocks(pinstance, i);
+                        return -ENOMEM;
+                }
+        }
+        return 0;
+}
+
+/**
+ * pmcraid_allocate_control_blocks - allocates memory control blocks
+ * @pinstance : pointer to per adapter instance structure
+ *
+ * This function allocates PCI memory for DMAable buffers like IOARCB, IOADLs
+ * and IOASAs. This is called after command blocks are already allocated.
+ *
+ * Return Value
+ *  0 in case it can allocate all control blocks, otherwise -ENOMEM
+ */
+static int __devinit
+pmcraid_allocate_control_blocks(struct pmcraid_instance *pinstance)
+{
+        int i;
+
+        sprintf(pinstance->ctl_pool_name, "pmcraid_control_pool_%d",
+                pinstance->host->unique_id);
+
+        pinstance->control_pool =
+                pci_pool_create(pinstance->ctl_pool_name,
+                                pinstance->pdev,
+                                sizeof(struct pmcraid_control_block),
+                                PMCRAID_IOARCB_ALIGNMENT, 0);
+
+        if (!pinstance->control_pool)
+                return -ENOMEM;
+
+        for (i = 0; i < PMCRAID_MAX_CMD; i++) {
+                pinstance->cmd_list[i]->ioa_cb =
+                        pci_pool_alloc(
+                                pinstance->control_pool,
+                                GFP_KERNEL,
+                                &(pinstance->cmd_list[i]->ioa_cb_bus_addr));
+
+                if (!pinstance->cmd_list[i]->ioa_cb) {
+                        pmcraid_release_control_blocks(pinstance, i);
+                        return -ENOMEM;
+                }
+                memset(pinstance->cmd_list[i]->ioa_cb, 0,
+                        sizeof(struct pmcraid_control_block));
+        }
+        return 0;
+}
+
+/**
+ * pmcraid_release_host_rrqs - release memory allocated for hrrq buffer(s)
+ * @pinstance: pointer to per adapter instance structure
+ * @maxindex: size of hrrq buffer pointer array
+ *
+ * Return Value
+ *      None
+ */
+static void
+pmcraid_release_host_rrqs(struct pmcraid_instance *pinstance, int maxindex)
+{
+        int i;
+        for (i = 0; i < maxindex; i++) {
+
+                pci_free_consistent(pinstance->pdev,
+                                    HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD,
+                                    pinstance->hrrq_start[i],
+                                    pinstance->hrrq_start_bus_addr[i]);
+
+                /* reset pointers and toggle bit to zeros */
+                pinstance->hrrq_start[i] = NULL;
+                pinstance->hrrq_start_bus_addr[i] = 0;
+                pinstance->host_toggle_bit[i] = 0;
+        }
+}
+
+/**
+ * pmcraid_allocate_host_rrqs - Allocate and initialize host RRQ buffers
+ * @pinstance: pointer to per adapter instance structure
+ *
+ * Return value
+ *      0 hrrq buffers are allocated, -ENOMEM otherwise.
+ */
+static int __devinit
+pmcraid_allocate_host_rrqs(struct pmcraid_instance *pinstance)
+{
+        int i;
+        int buf_count = PMCRAID_MAX_CMD / pinstance->num_hrrq;
+
+        for (i = 0; i < pinstance->num_hrrq; i++) {
+                int buffer_size = HRRQ_ENTRY_SIZE * buf_count;
+
+                pinstance->hrrq_start[i] =
+                        pci_alloc_consistent(
+                                        pinstance->pdev,
+                                        buffer_size,
+                                        &(pinstance->hrrq_start_bus_addr[i]));
+
+                if (pinstance->hrrq_start[i] == 0) {
+                        pmcraid_err("could not allocate host rrq: %d\n", i);
+                        pmcraid_release_host_rrqs(pinstance, i);
+                        return -ENOMEM;
+                }
+
+                memset(pinstance->hrrq_start[i], 0, buffer_size);
+                pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
+                pinstance->hrrq_end[i] =
+                        pinstance->hrrq_start[i] + buf_count - 1;
+                pinstance->host_toggle_bit[i] = 1;
+                spin_lock_init(&pinstance->hrrq_lock[i]);
+        }
+        return 0;
+}
+
+/**
+ * pmcraid_release_hcams - release HCAM buffers
+ *
+ * @pinstance: pointer to per adapter instance structure
+ *
+ * Return value
+ *  none
+ */
+static void pmcraid_release_hcams(struct pmcraid_instance *pinstance)
+{
+        if (pinstance->ccn.msg != NULL) {
+                pci_free_consistent(pinstance->pdev,
+                                    PMCRAID_AEN_HDR_SIZE +
+                                    sizeof(struct pmcraid_hcam_ccn),
+                                    pinstance->ccn.msg,
+                                    pinstance->ccn.baddr);
+
+                pinstance->ccn.msg = NULL;
+                pinstance->ccn.hcam = NULL;
+                pinstance->ccn.baddr = 0;
+        }
+
+        if (pinstance->ldn.msg != NULL) {
+                pci_free_consistent(pinstance->pdev,
+                                    PMCRAID_AEN_HDR_SIZE +
+                                    sizeof(struct pmcraid_hcam_ldn),
+                                    pinstance->ldn.msg,
+                                    pinstance->ldn.baddr);
+
+                pinstance->ldn.msg = NULL;
+                pinstance->ldn.hcam = NULL;
+                pinstance->ldn.baddr = 0;
+        }
+}
+
+/**
+ * pmcraid_allocate_hcams - allocates HCAM buffers
+ * @pinstance : pointer to per adapter instance structure
+ *
+ * Return Value:
+ *   0 in case of successful allocation, non-zero otherwise
+ */
+static int pmcraid_allocate_hcams(struct pmcraid_instance *pinstance)
+{
+        pinstance->ccn.msg = pci_alloc_consistent(
+                                        pinstance->pdev,
+                                        PMCRAID_AEN_HDR_SIZE +
+                                        sizeof(struct pmcraid_hcam_ccn),
+                                        &(pinstance->ccn.baddr));
+
+        pinstance->ldn.msg = pci_alloc_consistent(
+                                        pinstance->pdev,
+                                        PMCRAID_AEN_HDR_SIZE +
+                                        sizeof(struct pmcraid_hcam_ldn),
+                                        &(pinstance->ldn.baddr));
+
+        if (pinstance->ldn.msg == NULL || pinstance->ccn.msg == NULL) {
+                pmcraid_release_hcams(pinstance);
+        } else {
+                pinstance->ccn.hcam =
+                        (void *)pinstance->ccn.msg + PMCRAID_AEN_HDR_SIZE;
+                pinstance->ldn.hcam =
+                        (void *)pinstance->ldn.msg + PMCRAID_AEN_HDR_SIZE;
+
+                atomic_set(&pinstance->ccn.ignore, 0);
+                atomic_set(&pinstance->ldn.ignore, 0);
+        }
+
+        return (pinstance->ldn.msg == NULL) ? -ENOMEM : 0;
+}
+
+/**
+ * pmcraid_release_config_buffers - release config.table buffers
+ * @pinstance: pointer to per adapter instance structure
+ *
+ * Return Value
+ *       none
+ */
+static void pmcraid_release_config_buffers(struct pmcraid_instance *pinstance)
+{
+        if (pinstance->cfg_table != NULL &&
+            pinstance->cfg_table_bus_addr != 0) {
+                pci_free_consistent(pinstance->pdev,
+                                    sizeof(struct pmcraid_config_table),
+                                    pinstance->cfg_table,
+                                    pinstance->cfg_table_bus_addr);
+                pinstance->cfg_table = NULL;
+                pinstance->cfg_table_bus_addr = 0;
+        }
+
+        if (pinstance->res_entries != NULL) {
+                int i;
+
+                for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
+                        list_del(&pinstance->res_entries[i].queue);
+                kfree(pinstance->res_entries);
+                pinstance->res_entries = NULL;
+        }
+
+        pmcraid_release_hcams(pinstance);
+}
+
+/**
+ * pmcraid_allocate_config_buffers - allocates DMAable memory for config table
+ * @pinstance : pointer to per adapter instance structure
+ *
+ * Return Value
+ *      0 for successful allocation, -ENOMEM for any failure
+ */
+static int __devinit
+pmcraid_allocate_config_buffers(struct pmcraid_instance *pinstance)
+{
+        int i;
+
+        pinstance->res_entries =
+                        kzalloc(sizeof(struct pmcraid_resource_entry) *
+                                PMCRAID_MAX_RESOURCES, GFP_KERNEL);
+
+        if (NULL == pinstance->res_entries) {
+                pmcraid_err("failed to allocate memory for resource table\n");
+                return -ENOMEM;
+        }
+
+        for (i = 0; i < PMCRAID_MAX_RESOURCES; i++)
+                list_add_tail(&pinstance->res_entries[i].queue,
+                              &pinstance->free_res_q);
+
+        pinstance->cfg_table =
+                pci_alloc_consistent(pinstance->pdev,
+                                     sizeof(struct pmcraid_config_table),
+                                     &pinstance->cfg_table_bus_addr);
+
+        if (NULL == pinstance->cfg_table) {
+                pmcraid_err("couldn't alloc DMA memory for config table\n");
+                pmcraid_release_config_buffers(pinstance);
+                return -ENOMEM;
+        }
+
+        if (pmcraid_allocate_hcams(pinstance)) {
+                pmcraid_err("could not alloc DMA memory for HCAMS\n");
+                pmcraid_release_config_buffers(pinstance);
+                return -ENOMEM;
+        }
+
+        return 0;
+}
+
+/**
+ * pmcraid_init_tasklets - registers tasklets for response handling
+ *
+ * @pinstance: pointer adapter instance structure
+ *
+ * Return value
+ *      none
+ */
+static void pmcraid_init_tasklets(struct pmcraid_instance *pinstance)
+{
+        int i;
+        for (i = 0; i < pinstance->num_hrrq; i++)
+                tasklet_init(&pinstance->isr_tasklet[i],
+                             pmcraid_tasklet_function,
+                             (unsigned long)&pinstance->hrrq_vector[i]);
+}
+
+/**
+ * pmcraid_kill_tasklets - destroys tasklets registered for response handling
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return value
+ *      none
+ */
+static void pmcraid_kill_tasklets(struct pmcraid_instance *pinstance)
+{
+        int i;
+        for (i = 0; i < pinstance->num_hrrq; i++)
+                tasklet_kill(&pinstance->isr_tasklet[i]);
+}
+
+/**
+ * pmcraid_init_buffers - allocates memory and initializes various structures
+ * @pinstance: pointer to per adapter instance structure
+ *
+ * This routine pre-allocates memory based on the type of block as below:
+ * cmdblocks(PMCRAID_MAX_CMD): kernel memory using kernel's slab_allocator,
+ * IOARCBs(PMCRAID_MAX_CMD)  : DMAable memory, using pci pool allocator
+ * config-table entries      : DMAable memory using pci_alloc_consistent
+ * HostRRQs                  : DMAable memory, using pci_alloc_consistent
+ *
+ * Return Value
+ *       0 in case all of the blocks are allocated, -ENOMEM otherwise.
+ */
+static int __devinit pmcraid_init_buffers(struct pmcraid_instance *pinstance)
+{
+        int i;
+
+        if (pmcraid_allocate_host_rrqs(pinstance)) {
+                pmcraid_err("couldn't allocate memory for %d host rrqs\n",
+                             pinstance->num_hrrq);
+                return -ENOMEM;
+        }
+
+        if (pmcraid_allocate_config_buffers(pinstance)) {
+                pmcraid_err("couldn't allocate memory for config buffers\n");
+                pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
+                return -ENOMEM;
+        }
+
+        if (pmcraid_allocate_cmd_blocks(pinstance)) {
+                pmcraid_err("couldn't allocate memory for cmd blocks \n");
+                pmcraid_release_config_buffers(pinstance);
+                pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
+                return -ENOMEM;
+        }
+
+        if (pmcraid_allocate_control_blocks(pinstance)) {
+                pmcraid_err("couldn't allocate memory control blocks \n");
+                pmcraid_release_config_buffers(pinstance);
+                pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
+                pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
+                return -ENOMEM;
+        }
+
+        /* Initialize all the command blocks and add them to free pool. No
+         * need to lock (free_pool_lock) as this is done in initialization
+         * itself
+         */
+        for (i = 0; i < PMCRAID_MAX_CMD; i++) {
+                struct pmcraid_cmd *cmdp = pinstance->cmd_list[i];
+                pmcraid_init_cmdblk(cmdp, i);
+                cmdp->drv_inst = pinstance;
+                list_add_tail(&cmdp->free_list, &pinstance->free_cmd_pool);
+        }
+
+        return 0;
+}
+
+/**
+ * pmcraid_reinit_buffers - resets various buffer pointers
+ * @pinstance: pointer to adapter instance
+ * Return value
+ *      none
+ */
+static void pmcraid_reinit_buffers(struct pmcraid_instance *pinstance)
+{
+        int i;
+        int buffer_size = HRRQ_ENTRY_SIZE * PMCRAID_MAX_CMD;
+
+        for (i = 0; i < pinstance->num_hrrq; i++) {
+                memset(pinstance->hrrq_start[i], 0, buffer_size);
+                pinstance->hrrq_curr[i] = pinstance->hrrq_start[i];
+                pinstance->hrrq_end[i] =
+                        pinstance->hrrq_start[i] + PMCRAID_MAX_CMD - 1;
+                pinstance->host_toggle_bit[i] = 1;
+        }
+}
+
+/**
+ * pmcraid_init_instance - initialize per instance data structure
+ * @pdev: pointer to pci device structure
+ * @host: pointer to Scsi_Host structure
+ * @mapped_pci_addr: memory mapped IOA configuration registers
+ *
+ * Return Value
+ *       0 on success, non-zero in case of any failure
+ */
+static int __devinit pmcraid_init_instance(
+        struct pci_dev *pdev,
+        struct Scsi_Host *host,
+        void __iomem *mapped_pci_addr
+)
+{
+        struct pmcraid_instance *pinstance =
+                (struct pmcraid_instance *)host->hostdata;
+
+        pinstance->host = host;
+        pinstance->pdev = pdev;
+
+        /* Initialize register addresses */
+        pinstance->mapped_dma_addr = mapped_pci_addr;
+
+        /* Initialize chip-specific details */
+        {
+                struct pmcraid_chip_details *chip_cfg = pinstance->chip_cfg;
+                struct pmcraid_interrupts *pint_regs = &pinstance->int_regs;
+
+                pinstance->ioarrin = mapped_pci_addr + chip_cfg->ioarrin;
+
+                pint_regs->ioa_host_interrupt_reg =
+                        mapped_pci_addr + chip_cfg->ioa_host_intr;
+                pint_regs->ioa_host_interrupt_clr_reg =
+                        mapped_pci_addr + chip_cfg->ioa_host_intr_clr;
+                pint_regs->host_ioa_interrupt_reg =
+                        mapped_pci_addr + chip_cfg->host_ioa_intr;
+                pint_regs->host_ioa_interrupt_clr_reg =
+                        mapped_pci_addr + chip_cfg->host_ioa_intr_clr;
+
+                /* Current version of firmware exposes interrupt mask set
+                 * and mask clr registers through memory mapped bar0.
+                 */
+                pinstance->mailbox = mapped_pci_addr + chip_cfg->mailbox;
+                pinstance->ioa_status = mapped_pci_addr + chip_cfg->ioastatus;
+                pint_regs->ioa_host_interrupt_mask_reg =
+                        mapped_pci_addr + chip_cfg->ioa_host_mask;
+                pint_regs->ioa_host_interrupt_mask_clr_reg =
+                        mapped_pci_addr + chip_cfg->ioa_host_mask_clr;
+                pint_regs->global_interrupt_mask_reg =
+                        mapped_pci_addr + chip_cfg->global_intr_mask;
+        };
+
+        pinstance->ioa_reset_attempts = 0;
+        init_waitqueue_head(&pinstance->reset_wait_q);
+
+        atomic_set(&pinstance->outstanding_cmds, 0);
+        atomic_set(&pinstance->expose_resources, 0);
+
+        INIT_LIST_HEAD(&pinstance->free_res_q);
+        INIT_LIST_HEAD(&pinstance->used_res_q);
+        INIT_LIST_HEAD(&pinstance->free_cmd_pool);
+        INIT_LIST_HEAD(&pinstance->pending_cmd_pool);
+
+        spin_lock_init(&pinstance->free_pool_lock);
+        spin_lock_init(&pinstance->pending_pool_lock);
+        spin_lock_init(&pinstance->resource_lock);
+        mutex_init(&pinstance->aen_queue_lock);
+
+        /* Work-queue (Shared) for deferred processing error handling */
+        INIT_WORK(&pinstance->worker_q, pmcraid_worker_function);
+
+        /* Initialize the default log_level */
+        pinstance->current_log_level = pmcraid_log_level;
+
+        /* Setup variables required for reset engine */
+        pinstance->ioa_state = IOA_STATE_UNKNOWN;
+        pinstance->reset_cmd = NULL;
+        return 0;
+}
+
+/**
+ * pmcraid_release_buffers - release per-adapter buffers allocated
+ *
+ * @pinstance: pointer to adapter soft state
+ *
+ * Return Value
+ *      none
+ */
+static void pmcraid_release_buffers(struct pmcraid_instance *pinstance)
+{
+        pmcraid_release_config_buffers(pinstance);
+        pmcraid_release_control_blocks(pinstance, PMCRAID_MAX_CMD);
+        pmcraid_release_cmd_blocks(pinstance, PMCRAID_MAX_CMD);
+        pmcraid_release_host_rrqs(pinstance, pinstance->num_hrrq);
+
+}
+
+/**
+ * pmcraid_shutdown - shutdown adapter controller.
+ * @pdev: pci device struct
+ *
+ * Issues an adapter shutdown to the card waits for its completion
+ *
+ * Return value
+ *        none
+ */
+static void pmcraid_shutdown(struct pci_dev *pdev)
+{
+        struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
+        pmcraid_reset_bringdown(pinstance);
+}
+
+
+/**
+ * pmcraid_get_minor - returns unused minor number from minor number bitmap
+ */
+static unsigned short pmcraid_get_minor(void)
+{
+        int minor;
+
+        minor = find_first_zero_bit(pmcraid_minor, sizeof(pmcraid_minor));
+        __set_bit(minor, pmcraid_minor);
+        return minor;
+}
+
+/**
+ * pmcraid_release_minor - releases given minor back to minor number bitmap
+ */
+static void pmcraid_release_minor(unsigned short minor)
+{
+        __clear_bit(minor, pmcraid_minor);
+}
+
+/**
+ * pmcraid_setup_chrdev - allocates a minor number and registers a char device
+ *
+ * @pinstance: pointer to adapter instance for which to register device
+ *
+ * Return value
+ *      0 in case of success, otherwise non-zero
+ */
+static int pmcraid_setup_chrdev(struct pmcraid_instance *pinstance)
+{
+        int minor;
+        int error;
+
+        minor = pmcraid_get_minor();
+        cdev_init(&pinstance->cdev, &pmcraid_fops);
+        pinstance->cdev.owner = THIS_MODULE;
+
+        error = cdev_add(&pinstance->cdev, MKDEV(pmcraid_major, minor), 1);
+
+        if (error)
+                pmcraid_release_minor(minor);
+        else
+                device_create(pmcraid_class, NULL, MKDEV(pmcraid_major, minor),
+                              NULL, "pmcsas%u", minor);
+        return error;
+}
+
+/**
+ * pmcraid_release_chrdev - unregisters per-adapter management interface
+ *
+ * @pinstance: pointer to adapter instance structure
+ *
+ * Return value
+ *  none
+ */
+static void pmcraid_release_chrdev(struct pmcraid_instance *pinstance)
+{
+        pmcraid_release_minor(MINOR(pinstance->cdev.dev));
+        device_destroy(pmcraid_class,
+                       MKDEV(pmcraid_major, MINOR(pinstance->cdev.dev)));
+        cdev_del(&pinstance->cdev);
+}
+
+/**
+ * pmcraid_remove - IOA hot plug remove entry point
+ * @pdev: pci device struct
+ *
+ * Return value
+ *        none
+ */
+static void __devexit pmcraid_remove(struct pci_dev *pdev)
+{
+        struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
+
+        /* remove the management interface (/dev file) for this device */
+        pmcraid_release_chrdev(pinstance);
+
+        /* remove host template from scsi midlayer */
+        scsi_remove_host(pinstance->host);
+
+        /* block requests from mid-layer */
+        scsi_block_requests(pinstance->host);
+
+        /* initiate shutdown adapter */
+        pmcraid_shutdown(pdev);
+
+        pmcraid_disable_interrupts(pinstance, ~0);
+        flush_scheduled_work();
+
+        pmcraid_kill_tasklets(pinstance);
+        pmcraid_unregister_interrupt_handler(pinstance);
+        pmcraid_release_buffers(pinstance);
+        iounmap(pinstance->mapped_dma_addr);
+        pci_release_regions(pdev);
+        scsi_host_put(pinstance->host);
+        pci_disable_device(pdev);
+
+        return;
+}
+
+#ifdef CONFIG_PM
+/**
+ * pmcraid_suspend - driver suspend entry point for power management
+ * @pdev:   PCI device structure
+ * @state:  PCI power state to suspend routine
+ *
+ * Return Value - 0 always
+ */
+static int pmcraid_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+        struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
+
+        pmcraid_shutdown(pdev);
+        pmcraid_disable_interrupts(pinstance, ~0);
+        pmcraid_kill_tasklets(pinstance);
+        pci_set_drvdata(pinstance->pdev, pinstance);
+        pmcraid_unregister_interrupt_handler(pinstance);
+        pci_save_state(pdev);
+        pci_disable_device(pdev);
+        pci_set_power_state(pdev, pci_choose_state(pdev, state));
+
+        return 0;
+}
+
+/**
+ * pmcraid_resume - driver resume entry point PCI power management
+ * @pdev: PCI device structure
+ *
+ * Return Value - 0 in case of success. Error code in case of any failure
+ */
+static int pmcraid_resume(struct pci_dev *pdev)
+{
+        struct pmcraid_instance *pinstance = pci_get_drvdata(pdev);
+        struct Scsi_Host *host = pinstance->host;
+        int rc;
+        int hrrqs;
+
+        pci_set_power_state(pdev, PCI_D0);
+        pci_enable_wake(pdev, PCI_D0, 0);
+        pci_restore_state(pdev);
+
+        rc = pci_enable_device(pdev);
+
+        if (rc) {
+                pmcraid_err("pmcraid: Enable device failed\n");
+                return rc;
+        }
+
+        pci_set_master(pdev);
+
+        if ((sizeof(dma_addr_t) == 4) ||
+             pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
+                rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+
+        if (rc == 0)
+                rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+
+        if (rc != 0) {
+                dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
+                goto disable_device;
+        }
+
+        atomic_set(&pinstance->outstanding_cmds, 0);
+        hrrqs = pinstance->num_hrrq;
+        rc = pmcraid_register_interrupt_handler(pinstance);
+
+        if (rc) {
+                pmcraid_err("resume: couldn't register interrupt handlers\n");
+                rc = -ENODEV;
+                goto release_host;
+        }
+
+        pmcraid_init_tasklets(pinstance);
+        pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
+
+        /* Start with hard reset sequence which brings up IOA to operational
+         * state as well as completes the reset sequence.
+         */
+        pinstance->ioa_hard_reset = 1;
+
+        /* Start IOA firmware initialization and bring card to Operational
+         * state.
+         */
+        if (pmcraid_reset_bringup(pinstance)) {
+                pmcraid_err("couldn't initialize IOA \n");
+                rc = -ENODEV;
+                goto release_tasklets;
+        }
+
+        return 0;
+
+release_tasklets:
+        pmcraid_kill_tasklets(pinstance);
+        pmcraid_unregister_interrupt_handler(pinstance);
+
+release_host:
+        scsi_host_put(host);
+
+disable_device:
+        pci_disable_device(pdev);
+
+        return rc;
+}
+
+#else
+
+#define pmcraid_suspend NULL
+#define pmcraid_resume  NULL
+
+#endif /* CONFIG_PM */
+
+/**
+ * pmcraid_complete_ioa_reset - Called by either timer or tasklet during
+ *                              completion of the ioa reset
+ * @cmd: pointer to reset command block
+ */
+static void pmcraid_complete_ioa_reset(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        unsigned long flags;
+
+        spin_lock_irqsave(pinstance->host->host_lock, flags);
+        pmcraid_ioa_reset(cmd);
+        spin_unlock_irqrestore(pinstance->host->host_lock, flags);
+        scsi_unblock_requests(pinstance->host);
+        schedule_work(&pinstance->worker_q);
+}
+
+/**
+ * pmcraid_set_supported_devs - sends SET SUPPORTED DEVICES to IOAFP
+ *
+ * @cmd: pointer to pmcraid_cmd structure
+ *
+ * Return Value
+ *  0 for success or non-zero for failure cases
+ */
+static void pmcraid_set_supported_devs(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        void (*cmd_done) (struct pmcraid_cmd *) = pmcraid_complete_ioa_reset;
+
+        pmcraid_reinit_cmdblk(cmd);
+
+        ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
+        ioarcb->request_type = REQ_TYPE_IOACMD;
+        ioarcb->cdb[0] = PMCRAID_SET_SUPPORTED_DEVICES;
+        ioarcb->cdb[1] = ALL_DEVICES_SUPPORTED;
+
+        /* If this was called as part of resource table reinitialization due to
+         * lost CCN, it is enough to return the command block back to free pool
+         * as part of set_supported_devs completion function.
+         */
+        if (cmd->drv_inst->reinit_cfg_table) {
+                cmd->drv_inst->reinit_cfg_table = 0;
+                cmd->release = 1;
+                cmd_done = pmcraid_reinit_cfgtable_done;
+        }
+
+        /* we will be done with the reset sequence after set supported devices,
+         * setup the done function to return the command block back to free
+         * pool
+         */
+        pmcraid_send_cmd(cmd,
+                         cmd_done,
+                         PMCRAID_SET_SUP_DEV_TIMEOUT,
+                         pmcraid_timeout_handler);
+        return;
+}
+
+/**
+ * pmcraid_init_res_table - Initialize the resource table
+ * @cmd:  pointer to pmcraid command struct
+ *
+ * This function looks through the existing resource table, comparing
+ * it with the config table. This function will take care of old/new
+ * devices and schedule adding/removing them from the mid-layer
+ * as appropriate.
+ *
+ * Return value
+ *       None
+ */
+static void pmcraid_init_res_table(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        struct pmcraid_resource_entry *res, *temp;
+        struct pmcraid_config_table_entry *cfgte;
+        unsigned long lock_flags;
+        int found, rc, i;
+        LIST_HEAD(old_res);
+
+        if (pinstance->cfg_table->flags & MICROCODE_UPDATE_REQUIRED)
+                dev_err(&pinstance->pdev->dev, "Require microcode download\n");
+
+        /* resource list is protected by pinstance->resource_lock.
+         * init_res_table can be called from probe (user-thread) or runtime
+         * reset (timer/tasklet)
+         */
+        spin_lock_irqsave(&pinstance->resource_lock, lock_flags);
+
+        list_for_each_entry_safe(res, temp, &pinstance->used_res_q, queue)
+                list_move_tail(&res->queue, &old_res);
+
+        for (i = 0; i < pinstance->cfg_table->num_entries; i++) {
+                cfgte = &pinstance->cfg_table->entries[i];
+
+                if (!pmcraid_expose_resource(cfgte))
+                        continue;
+
+                found = 0;
+
+                /* If this entry was already detected and initialized */
+                list_for_each_entry_safe(res, temp, &old_res, queue) {
+
+                        rc = memcmp(&res->cfg_entry.resource_address,
+                                    &cfgte->resource_address,
+                                    sizeof(cfgte->resource_address));
+                        if (!rc) {
+                                list_move_tail(&res->queue,
+                                                &pinstance->used_res_q);
+                                found = 1;
+                                break;
+                        }
+                }
+
+                /* If this is new entry, initialize it and add it the queue */
+                if (!found) {
+
+                        if (list_empty(&pinstance->free_res_q)) {
+                                dev_err(&pinstance->pdev->dev,
+                                        "Too many devices attached\n");
+                                break;
+                        }
+
+                        found = 1;
+                        res = list_entry(pinstance->free_res_q.next,
+                                         struct pmcraid_resource_entry, queue);
+
+                        res->scsi_dev = NULL;
+                        res->change_detected = RES_CHANGE_ADD;
+                        res->reset_progress = 0;
+                        list_move_tail(&res->queue, &pinstance->used_res_q);
+                }
+
+                /* copy new configuration table entry details into driver
+                 * maintained resource entry
+                 */
+                if (found) {
+                        memcpy(&res->cfg_entry, cfgte,
+                                sizeof(struct pmcraid_config_table_entry));
+                        pmcraid_info("New res type:%x, vset:%x, addr:%x:\n",
+                                 res->cfg_entry.resource_type,
+                                 res->cfg_entry.unique_flags1,
+                                 le32_to_cpu(res->cfg_entry.resource_address));
+                }
+        }
+
+        /* Detect any deleted entries, mark them for deletion from mid-layer */
+        list_for_each_entry_safe(res, temp, &old_res, queue) {
+
+                if (res->scsi_dev) {
+                        res->change_detected = RES_CHANGE_DEL;
+                        res->cfg_entry.resource_handle =
+                                PMCRAID_INVALID_RES_HANDLE;
+                        list_move_tail(&res->queue, &pinstance->used_res_q);
+                } else {
+                        list_move_tail(&res->queue, &pinstance->free_res_q);
+                }
+        }
+
+        /* release the resource list lock */
+        spin_unlock_irqrestore(&pinstance->resource_lock, lock_flags);
+        pmcraid_set_supported_devs(cmd);
+}
+
+/**
+ * pmcraid_querycfg - Send a Query IOA Config to the adapter.
+ * @cmd: pointer pmcraid_cmd struct
+ *
+ * This function sends a Query IOA Configuration command to the adapter to
+ * retrieve the IOA configuration table.
+ *
+ * Return value:
+ *      none
+ */
+static void pmcraid_querycfg(struct pmcraid_cmd *cmd)
+{
+        struct pmcraid_ioarcb *ioarcb = &cmd->ioa_cb->ioarcb;
+        struct pmcraid_ioadl_desc *ioadl = ioarcb->add_data.u.ioadl;
+        struct pmcraid_instance *pinstance = cmd->drv_inst;
+        int cfg_table_size = cpu_to_be32(sizeof(struct pmcraid_config_table));
+
+        ioarcb->request_type = REQ_TYPE_IOACMD;
+        ioarcb->resource_handle = cpu_to_le32(PMCRAID_IOA_RES_HANDLE);
+
+        ioarcb->cdb[0] = PMCRAID_QUERY_IOA_CONFIG;
+
+        /* firmware requires 4-byte length field, specified in B.E format */
+        memcpy(&(ioarcb->cdb[10]), &cfg_table_size, sizeof(cfg_table_size));
+
+        /* Since entire config table can be described by single IOADL, it can
+         * be part of IOARCB itself
+         */
+        ioarcb->ioadl_bus_addr = cpu_to_le64((cmd->ioa_cb_bus_addr) +
+                                        offsetof(struct pmcraid_ioarcb,
+                                                add_data.u.ioadl[0]));
+        ioarcb->ioadl_length = cpu_to_le32(sizeof(struct pmcraid_ioadl_desc));
+        ioarcb->ioarcb_bus_addr &= ~(0x1FULL);
+
+        ioarcb->request_flags0 |= NO_LINK_DESCS;
+        ioarcb->data_transfer_length =
+                cpu_to_le32(sizeof(struct pmcraid_config_table));
+
+        ioadl = &(ioarcb->add_data.u.ioadl[0]);
+        ioadl->flags = cpu_to_le32(IOADL_FLAGS_LAST_DESC);
+        ioadl->address = cpu_to_le64(pinstance->cfg_table_bus_addr);
+        ioadl->data_len = cpu_to_le32(sizeof(struct pmcraid_config_table));
+
+        pmcraid_send_cmd(cmd, pmcraid_init_res_table,
+                         PMCRAID_INTERNAL_TIMEOUT, pmcraid_timeout_handler);
+}
+
+
+/**
+ * pmcraid_probe - PCI probe entry pointer for PMC MaxRaid controller driver
+ * @pdev: pointer to pci device structure
+ * @dev_id: pointer to device ids structure
+ *
+ * Return Value
+ *      returns 0 if the device is claimed and successfully configured.
+ *      returns non-zero error code in case of any failure
+ */
+static int __devinit pmcraid_probe(
+        struct pci_dev *pdev,
+        const struct pci_device_id *dev_id
+)
+{
+        struct pmcraid_instance *pinstance;
+        struct Scsi_Host *host;
+        void __iomem *mapped_pci_addr;
+        int rc = PCIBIOS_SUCCESSFUL;
+
+        if (atomic_read(&pmcraid_adapter_count) >= PMCRAID_MAX_ADAPTERS) {
+                pmcraid_err
+                        ("maximum number(%d) of supported adapters reached\n",
+                         atomic_read(&pmcraid_adapter_count));
+                return -ENOMEM;
+        }
+
+        atomic_inc(&pmcraid_adapter_count);
+        rc = pci_enable_device(pdev);
+
+        if (rc) {
+                dev_err(&pdev->dev, "Cannot enable adapter\n");
+                atomic_dec(&pmcraid_adapter_count);
+                return rc;
+        }
+
+        dev_info(&pdev->dev,
+                "Found new IOA(%x:%x), Total IOA count: %d\n",
+                 pdev->vendor, pdev->device,
+                 atomic_read(&pmcraid_adapter_count));
+
+        rc = pci_request_regions(pdev, PMCRAID_DRIVER_NAME);
+
+        if (rc < 0) {
+                dev_err(&pdev->dev,
+                        "Couldn't register memory range of registers\n");
+                goto out_disable_device;
+        }
+
+        mapped_pci_addr = pci_iomap(pdev, 0, 0);
+
+        if (!mapped_pci_addr) {
+                dev_err(&pdev->dev, "Couldn't map PCI registers memory\n");
+                rc = -ENOMEM;
+                goto out_release_regions;
+        }
+
+        pci_set_master(pdev);
+
+        /* Firmware requires the system bus address of IOARCB to be within
+         * 32-bit addressable range though it has 64-bit IOARRIN register.
+         * However, firmware supports 64-bit streaming DMA buffers, whereas
+         * coherent buffers are to be 32-bit. Since pci_alloc_consistent always
+         * returns memory within 4GB (if not, change this logic), coherent
+         * buffers are within firmware acceptible address ranges.
+         */
+        if ((sizeof(dma_addr_t) == 4) ||
+            pci_set_dma_mask(pdev, DMA_BIT_MASK(64)))
+                rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+
+        /* firmware expects 32-bit DMA addresses for IOARRIN register; set 32
+         * bit mask for pci_alloc_consistent to return addresses within 4GB
+         */
+        if (rc == 0)
+                rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
+
+        if (rc != 0) {
+                dev_err(&pdev->dev, "Failed to set PCI DMA mask\n");
+                goto cleanup_nomem;
+        }
+
+        host = scsi_host_alloc(&pmcraid_host_template,
+                                sizeof(struct pmcraid_instance));
+
+        if (!host) {
+                dev_err(&pdev->dev, "scsi_host_alloc failed!\n");
+                rc = -ENOMEM;
+                goto cleanup_nomem;
+        }
+
+        host->max_id = PMCRAID_MAX_NUM_TARGETS_PER_BUS;
+        host->max_lun = PMCRAID_MAX_NUM_LUNS_PER_TARGET;
+        host->unique_id = host->host_no;
+        host->max_channel = PMCRAID_MAX_BUS_TO_SCAN;
+        host->max_cmd_len = PMCRAID_MAX_CDB_LEN;
+
+        /* zero out entire instance structure */
+        pinstance = (struct pmcraid_instance *)host->hostdata;
+        memset(pinstance, 0, sizeof(*pinstance));
+
+        pinstance->chip_cfg =
+                (struct pmcraid_chip_details *)(dev_id->driver_data);
+
+        rc = pmcraid_init_instance(pdev, host, mapped_pci_addr);
+
+        if (rc < 0) {
+                dev_err(&pdev->dev, "failed to initialize adapter instance\n");
+                goto out_scsi_host_put;
+        }
+
+        pci_set_drvdata(pdev, pinstance);
+
+        /* Save PCI config-space for use following the reset */
+        rc = pci_save_state(pinstance->pdev);
+
+        if (rc != 0) {
+                dev_err(&pdev->dev, "Failed to save PCI config space\n");
+                goto out_scsi_host_put;
+        }
+
+        pmcraid_disable_interrupts(pinstance, ~0);
+
+        rc = pmcraid_register_interrupt_handler(pinstance);
+
+        if (rc) {
+                pmcraid_err("couldn't register interrupt handler\n");
+                goto out_scsi_host_put;
+        }
+
+        pmcraid_init_tasklets(pinstance);
+
+        /* allocate verious buffers used by LLD.*/
+        rc = pmcraid_init_buffers(pinstance);
+
+        if (rc) {
+                pmcraid_err("couldn't allocate memory blocks\n");
+                goto out_unregister_isr;
+        }
+
+        /* check the reset type required */
+        pmcraid_reset_type(pinstance);
+
+        pmcraid_enable_interrupts(pinstance, PMCRAID_PCI_INTERRUPTS);
+
+        /* Start IOA firmware initialization and bring card to Operational
+         * state.
+         */
+        pmcraid_info("starting IOA initialization sequence\n");
+        if (pmcraid_reset_bringup(pinstance)) {
+                pmcraid_err("couldn't initialize IOA \n");
+                rc = 1;
+                goto out_release_bufs;
+        }
+
+        /* Add adapter instance into mid-layer list */
+        rc = scsi_add_host(pinstance->host, &pdev->dev);
+        if (rc != 0) {
+                pmcraid_err("couldn't add host into mid-layer: %d\n", rc);
+                goto out_release_bufs;
+        }
+
+        scsi_scan_host(pinstance->host);
+
+        rc = pmcraid_setup_chrdev(pinstance);
+
+        if (rc != 0) {
+                pmcraid_err("couldn't create mgmt interface, error: %x\n",
+                             rc);
+                goto out_remove_host;
+        }
+
+        /* Schedule worker thread to handle CCN and take care of adding and
+         * removing devices to OS
+         */
+        atomic_set(&pinstance->expose_resources, 1);
+        schedule_work(&pinstance->worker_q);
+        return rc;
+
+out_remove_host:
+        scsi_remove_host(host);
+
+out_release_bufs:
+        pmcraid_release_buffers(pinstance);
+
+out_unregister_isr:
+        pmcraid_kill_tasklets(pinstance);
+        pmcraid_unregister_interrupt_handler(pinstance);
+
+out_scsi_host_put:
+        scsi_host_put(host);
+
+cleanup_nomem:
+        iounmap(mapped_pci_addr);
+
+out_release_regions:
+        pci_release_regions(pdev);
+
+out_disable_device:
+        atomic_dec(&pmcraid_adapter_count);
+        pci_set_drvdata(pdev, NULL);
+        pci_disable_device(pdev);
+        return -ENODEV;
+}
+
+/*
+ * PCI driver structure of pcmraid driver
+ */
+static struct pci_driver pmcraid_driver = {
+        .name = PMCRAID_DRIVER_NAME,
+        .id_table = pmcraid_pci_table,
+        .probe = pmcraid_probe,
+        .remove = pmcraid_remove,
+        .suspend = pmcraid_suspend,
+        .resume = pmcraid_resume,
+        .shutdown = pmcraid_shutdown
+};
+
+
+/**
+ * pmcraid_init - module load entry point
+ */
+static int __init pmcraid_init(void)
+{
+        dev_t dev;
+        int error;
+
+        pmcraid_info("%s Device Driver version: %s %s\n",
+                         PMCRAID_DRIVER_NAME,
+                         PMCRAID_DRIVER_VERSION, PMCRAID_DRIVER_DATE);
+
+        error = alloc_chrdev_region(&dev, 0,
+                                    PMCRAID_MAX_ADAPTERS,
+                                    PMCRAID_DEVFILE);
+
+        if (error) {
+                pmcraid_err("failed to get a major number for adapters\n");
+                goto out_init;
+        }
+
+        pmcraid_major = MAJOR(dev);
+        pmcraid_class = class_create(THIS_MODULE, PMCRAID_DEVFILE);
+
+        if (IS_ERR(pmcraid_class)) {
+                error = PTR_ERR(pmcraid_class);
+                pmcraid_err("failed to register with with sysfs, error = %x\n",
+                            error);
+                goto out_unreg_chrdev;
+        }
+
+
+        error = pmcraid_netlink_init();
+
+        if (error)
+                goto out_unreg_chrdev;
+
+        error = pci_register_driver(&pmcraid_driver);
+
+        if (error == 0)
+                goto out_init;
+
+        pmcraid_err("failed to register pmcraid driver, error = %x\n",
+                     error);
+        class_destroy(pmcraid_class);
+        pmcraid_netlink_release();
+
+out_unreg_chrdev:
+        unregister_chrdev_region(MKDEV(pmcraid_major, 0), PMCRAID_MAX_ADAPTERS);
+out_init:
+        return error;
+}
+
+/**
+ * pmcraid_exit - module unload entry point
+ */
+static void __exit pmcraid_exit(void)
+{
+        pmcraid_netlink_release();
+        class_destroy(pmcraid_class);
+        unregister_chrdev_region(MKDEV(pmcraid_major, 0),
+                                 PMCRAID_MAX_ADAPTERS);
+        pci_unregister_driver(&pmcraid_driver);
+}
+
+module_init(pmcraid_init);
+module_exit(pmcraid_exit);
diff --git a/drivers/scsi/pmcraid.h b/drivers/scsi/pmcraid.h
new file mode 100644
index 000000000000..614b3a764fed
--- /dev/null
+++ b/drivers/scsi/pmcraid.h
@@ -0,0 +1,1029 @@
+/*
+ * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
+ *
+ * Copyright (C) 2008, 2009 PMC Sierra Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _PMCRAID_H
+#define _PMCRAID_H
+
+#include <linux/version.h>
+#include <linux/types.h>
+#include <linux/completion.h>
+#include <linux/list.h>
+#include <scsi/scsi.h>
+#include <linux/kref.h>
+#include <scsi/scsi_cmnd.h>
+#include <linux/cdev.h>
+#include <net/netlink.h>
+#include <net/genetlink.h>
+#include <linux/connector.h>
+/*
+ * Driver name   : string representing the driver name
+ * Device file   : /dev file to be used for management interfaces
+ * Driver version: version string in major_version.minor_version.patch format
+ * Driver date   : date information in "Mon dd yyyy" format
+ */
+#define PMCRAID_DRIVER_NAME             "PMC MaxRAID"
+#define PMCRAID_DEVFILE                 "pmcsas"
+#define PMCRAID_DRIVER_VERSION          "1.0.2"
+#define PMCRAID_DRIVER_DATE             __DATE__
+
+/* Maximum number of adapters supported by current version of the driver */
+#define PMCRAID_MAX_ADAPTERS            1024
+
+/* Bit definitions as per firmware, bit position [0][1][2].....[31] */
+#define PMC_BIT8(n)          (1 << (7-n))
+#define PMC_BIT16(n)         (1 << (15-n))
+#define PMC_BIT32(n)         (1 << (31-n))
+
+/* PMC PCI vendor ID and device ID values */
+#define PCI_VENDOR_ID_PMC                       0x11F8
+#define PCI_DEVICE_ID_PMC_MAXRAID               0x5220
+
+/*
+ * MAX_CMD          : maximum commands that can be outstanding with IOA
+ * MAX_IO_CMD       : command blocks available for IO commands
+ * MAX_HCAM_CMD     : command blocks avaibale for HCAMS
+ * MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
+ */
+#define PMCRAID_MAX_CMD                         1024
+#define PMCRAID_MAX_IO_CMD                      1020
+#define PMCRAID_MAX_HCAM_CMD                    2
+#define PMCRAID_MAX_INTERNAL_CMD                2
+
+/* MAX_IOADLS       : max number of scatter-gather lists supported by IOA
+ * IOADLS_INTERNAL  : number of ioadls included as part of IOARCB.
+ * IOADLS_EXTERNAL  : number of ioadls allocated external to IOARCB
+ */
+#define PMCRAID_IOADLS_INTERNAL                  27
+#define PMCRAID_IOADLS_EXTERNAL                  37
+#define PMCRAID_MAX_IOADLS                       PMCRAID_IOADLS_INTERNAL
+
+/* HRRQ_ENTRY_SIZE  : size of hrrq buffer
+ * IOARCB_ALIGNMENT : alignment required for IOARCB
+ * IOADL_ALIGNMENT  : alignment requirement for IOADLs
+ * MSIX_VECTORS     : number of MSIX vectors supported
+ */
+#define HRRQ_ENTRY_SIZE                          sizeof(__le32)
+#define PMCRAID_IOARCB_ALIGNMENT                 32
+#define PMCRAID_IOADL_ALIGNMENT                  16
+#define PMCRAID_IOASA_ALIGNMENT                  4
+#define PMCRAID_NUM_MSIX_VECTORS                 1
+
+/* various other limits */
+#define PMCRAID_VENDOR_ID_LEN                    8
+#define PMCRAID_PRODUCT_ID_LEN                   16
+#define PMCRAID_SERIAL_NUM_LEN                   8
+#define PMCRAID_LUN_LEN                          8
+#define PMCRAID_MAX_CDB_LEN                      16
+#define PMCRAID_DEVICE_ID_LEN                    8
+#define PMCRAID_SENSE_DATA_LEN                   256
+#define PMCRAID_ADD_CMD_PARAM_LEN                48
+
+#define PMCRAID_MAX_BUS_TO_SCAN                  1
+#define PMCRAID_MAX_NUM_TARGETS_PER_BUS          256
+#define PMCRAID_MAX_NUM_LUNS_PER_TARGET          8
+
+/* IOA bus/target/lun number of IOA resources */
+#define PMCRAID_IOA_BUS_ID                       0xfe
+#define PMCRAID_IOA_TARGET_ID                    0xff
+#define PMCRAID_IOA_LUN_ID                       0xff
+#define PMCRAID_VSET_BUS_ID                      0x1
+#define PMCRAID_VSET_LUN_ID                      0x0
+#define PMCRAID_PHYS_BUS_ID                      0x0
+#define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8
+#define PMCRAID_MAX_VSET_TARGETS                 240
+#define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8
+
+#define PMCRAID_IOA_MAX_SECTORS                  32767
+#define PMCRAID_VSET_MAX_SECTORS                 512
+#define PMCRAID_MAX_CMD_PER_LUN                  254
+
+/* Number of configuration table entries (resources) */
+#define PMCRAID_MAX_NUM_OF_VSETS                 240
+
+/* Todo : Check max limit for Phase 1 */
+#define PMCRAID_MAX_NUM_OF_PHY_DEVS              256
+
+/* MAX_NUM_OF_DEVS includes 1 FP, 1 Dummy Enclosure device */
+#define PMCRAID_MAX_NUM_OF_DEVS                        \
+    (PMCRAID_MAX_NUM_OF_VSETS + PMCRAID_MAX_NUM_OF_PHY_DEVS + 2)
+
+#define PMCRAID_MAX_RESOURCES                    PMCRAID_MAX_NUM_OF_DEVS
+
+/* Adapter Commands used by driver */
+#define PMCRAID_QUERY_RESOURCE_STATE             0xC2
+#define PMCRAID_RESET_DEVICE                     0xC3
+/* options to select reset target */
+#define ENABLE_RESET_MODIFIER                    0x80
+#define RESET_DEVICE_LUN                         0x40
+#define RESET_DEVICE_TARGET                      0x20
+#define RESET_DEVICE_BUS                         0x10
+
+#define PMCRAID_IDENTIFY_HRRQ                    0xC4
+#define PMCRAID_QUERY_IOA_CONFIG                 0xC5
+#define PMCRAID_QUERY_CMD_STATUS                 0xCB
+#define PMCRAID_ABORT_CMD                        0xC7
+
+/* CANCEL ALL command, provides option for setting SYNC_COMPLETE
+ * on the target resources for which commands got cancelled
+ */
+#define PMCRAID_CANCEL_ALL_REQUESTS              0xCE
+#define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL       PMC_BIT8(0)
+
+/* HCAM command and types of HCAM supported by IOA */
+#define PMCRAID_HOST_CONTROLLED_ASYNC            0xCF
+#define PMCRAID_HCAM_CODE_CONFIG_CHANGE          0x01
+#define PMCRAID_HCAM_CODE_LOG_DATA               0x02
+
+/* IOA shutdown command and various shutdown types */
+#define PMCRAID_IOA_SHUTDOWN                     0xF7
+#define PMCRAID_SHUTDOWN_NORMAL                  0x00
+#define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL      0x40
+#define PMCRAID_SHUTDOWN_NONE                    0x100
+#define PMCRAID_SHUTDOWN_ABBREV                  0x80
+
+/* SET SUPPORTED DEVICES command and the option to select all the
+ * devices to be supported
+ */
+#define PMCRAID_SET_SUPPORTED_DEVICES            0xFB
+#define ALL_DEVICES_SUPPORTED                    PMC_BIT8(0)
+
+/* This option is used with SCSI WRITE_BUFFER command */
+#define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE         0x05
+
+/* IOASC Codes used by driver */
+#define PMCRAID_IOASC_SENSE_MASK                 0xFFFFFF00
+#define PMCRAID_IOASC_SENSE_KEY(ioasc)           ((ioasc) >> 24)
+#define PMCRAID_IOASC_SENSE_CODE(ioasc)          (((ioasc) & 0x00ff0000) >> 16)
+#define PMCRAID_IOASC_SENSE_QUAL(ioasc)          (((ioasc) & 0x0000ff00) >> 8)
+#define PMCRAID_IOASC_SENSE_STATUS(ioasc)        ((ioasc) & 0x000000ff)
+
+#define PMCRAID_IOASC_GOOD_COMPLETION                   0x00000000
+#define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED              0x02040200
+#define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED             0x02048000
+#define PMCRAID_IOASC_NR_SYNC_REQUIRED                  0x023F0000
+#define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC          0x03110C00
+#define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE             0x04050000
+#define PMCRAID_IOASC_HW_DEVICE_TIMEOUT                 0x04080100
+#define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR        0x04448500
+#define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED             0x04448600
+#define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE        0x05250000
+#define PMCRAID_IOASC_AC_TERMINATED_BY_HOST             0x0B5A0000
+#define PMCRAID_IOASC_UA_BUS_WAS_RESET                  0x06290000
+#define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER         0x06298000
+
+/* Driver defined IOASCs */
+#define PMCRAID_IOASC_IOA_WAS_RESET                     0x10000001
+#define PMCRAID_IOASC_PCI_ACCESS_ERROR                  0x10000002
+
+/* Various timeout values (in milliseconds) used. If any of these are chip
+ * specific, move them to pmcraid_chip_details structure.
+ */
+#define PMCRAID_PCI_DEASSERT_TIMEOUT            2000
+#define PMCRAID_BIST_TIMEOUT                    2000
+#define PMCRAID_AENWAIT_TIMEOUT                 5000
+#define PMCRAID_TRANSOP_TIMEOUT                 60000
+
+#define PMCRAID_RESET_TIMEOUT                   (2 * HZ)
+#define PMCRAID_CHECK_FOR_RESET_TIMEOUT         ((HZ / 10))
+#define PMCRAID_VSET_IO_TIMEOUT                 (60 * HZ)
+#define PMCRAID_INTERNAL_TIMEOUT                (60 * HZ)
+#define PMCRAID_SHUTDOWN_TIMEOUT                (150 * HZ)
+#define PMCRAID_RESET_BUS_TIMEOUT               (60 * HZ)
+#define PMCRAID_RESET_HOST_TIMEOUT              (150 * HZ)
+#define PMCRAID_REQUEST_SENSE_TIMEOUT           (30 * HZ)
+#define PMCRAID_SET_SUP_DEV_TIMEOUT             (2 * 60 * HZ)
+
+/* structure to represent a scatter-gather element (IOADL descriptor) */
+struct pmcraid_ioadl_desc {
+        __le64 address;
+        __le32 data_len;
+        __u8  reserved[3];
+        __u8  flags;
+} __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));
+
+/* pmcraid_ioadl_desc.flags values */
+#define IOADL_FLAGS_CHAINED      PMC_BIT8(0)
+#define IOADL_FLAGS_LAST_DESC    PMC_BIT8(1)
+#define IOADL_FLAGS_READ_LAST    PMC_BIT8(1)
+#define IOADL_FLAGS_WRITE_LAST   PMC_BIT8(1)
+
+
+/* additional IOARCB data which can be CDB or additional request parameters
+ * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
+ * number of IOADLs are limted to 27. In case they are more than 27, they will
+ * be used in chained form
+ */
+struct pmcraid_ioarcb_add_data {
+        union {
+                struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
+                __u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
+        } u;
+};
+
+/*
+ * IOA Request Control Block
+ */
+struct pmcraid_ioarcb {
+        __le64 ioarcb_bus_addr;
+        __le32 resource_handle;
+        __le32 response_handle;
+        __le64 ioadl_bus_addr;
+        __le32 ioadl_length;
+        __le32 data_transfer_length;
+        __le64 ioasa_bus_addr;
+        __le16 ioasa_len;
+        __le16 cmd_timeout;
+        __le16 add_cmd_param_offset;
+        __le16 add_cmd_param_length;
+        __le32 reserved1[2];
+        __le32 reserved2;
+        __u8  request_type;
+        __u8  request_flags0;
+        __u8  request_flags1;
+        __u8  hrrq_id;
+        __u8  cdb[PMCRAID_MAX_CDB_LEN];
+        struct pmcraid_ioarcb_add_data add_data;
+} __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
+
+/* well known resource handle values */
+#define PMCRAID_IOA_RES_HANDLE        0xffffffff
+#define PMCRAID_INVALID_RES_HANDLE    0
+
+/* pmcraid_ioarcb.request_type values */
+#define REQ_TYPE_SCSI                 0x00
+#define REQ_TYPE_IOACMD               0x01
+#define REQ_TYPE_HCAM                 0x02
+
+/* pmcraid_ioarcb.flags0 values */
+#define TRANSFER_DIR_WRITE            PMC_BIT8(0)
+#define INHIBIT_UL_CHECK              PMC_BIT8(2)
+#define SYNC_OVERRIDE                 PMC_BIT8(3)
+#define SYNC_COMPLETE                 PMC_BIT8(4)
+#define NO_LINK_DESCS                 PMC_BIT8(5)
+
+/* pmcraid_ioarcb.flags1 values */
+#define DELAY_AFTER_RESET             PMC_BIT8(0)
+#define TASK_TAG_SIMPLE               0x10
+#define TASK_TAG_ORDERED              0x20
+#define TASK_TAG_QUEUE_HEAD           0x30
+
+/* toggle bit offset in response handle */
+#define HRRQ_TOGGLE_BIT               0x01
+#define HRRQ_RESPONSE_BIT             0x02
+
+/* IOA Status Area */
+struct pmcraid_ioasa_vset {
+        __le32 failing_lba_hi;
+        __le32 failing_lba_lo;
+        __le32 reserved;
+} __attribute__((packed, aligned(4)));
+
+struct pmcraid_ioasa {
+        __le32 ioasc;
+        __le16 returned_status_length;
+        __le16 available_status_length;
+        __le32 residual_data_length;
+        __le32 ilid;
+        __le32 fd_ioasc;
+        __le32 fd_res_address;
+        __le32 fd_res_handle;
+        __le32 reserved;
+
+        /* resource specific sense information */
+        union {
+                struct pmcraid_ioasa_vset vset;
+        } u;
+
+        /* IOA autosense data */
+        __le16 auto_sense_length;
+        __le16 error_data_length;
+        __u8  sense_data[PMCRAID_SENSE_DATA_LEN];
+} __attribute__((packed, aligned(4)));
+
+#define PMCRAID_DRIVER_ILID           0xffffffff
+
+/* Config Table Entry per Resource */
+struct pmcraid_config_table_entry {
+        __u8  resource_type;
+        __u8  bus_protocol;
+        __le16 array_id;
+        __u8  common_flags0;
+        __u8  common_flags1;
+        __u8  unique_flags0;
+        __u8  unique_flags1;    /*also used as vset target_id */
+        __le32 resource_handle;
+        __le32 resource_address;
+        __u8  device_id[PMCRAID_DEVICE_ID_LEN];
+        __u8  lun[PMCRAID_LUN_LEN];
+} __attribute__((packed, aligned(4)));
+
+/* resource types (config_table_entry.resource_type values) */
+#define RES_TYPE_AF_DASD     0x00
+#define RES_TYPE_GSCSI       0x01
+#define RES_TYPE_VSET        0x02
+#define RES_TYPE_IOA_FP      0xFF
+
+#define RES_IS_IOA(res)      ((res).resource_type == RES_TYPE_IOA_FP)
+#define RES_IS_GSCSI(res)    ((res).resource_type == RES_TYPE_GSCSI)
+#define RES_IS_VSET(res)     ((res).resource_type == RES_TYPE_VSET)
+#define RES_IS_AFDASD(res)   ((res).resource_type == RES_TYPE_AF_DASD)
+
+/* bus_protocol values used by driver */
+#define RES_TYPE_VENCLOSURE  0x8
+
+/* config_table_entry.common_flags0 */
+#define MULTIPATH_RESOURCE   PMC_BIT32(0)
+
+/* unique_flags1 */
+#define IMPORT_MODE_MANUAL   PMC_BIT8(0)
+
+/* well known resource handle values */
+#define RES_HANDLE_IOA       0xFFFFFFFF
+#define RES_HANDLE_NONE      0x00000000
+
+/* well known resource address values */
+#define RES_ADDRESS_IOAFP    0xFEFFFFFF
+#define RES_ADDRESS_INVALID  0xFFFFFFFF
+
+/* BUS/TARGET/LUN values from resource_addrr */
+#define RES_BUS(res_addr)    (le32_to_cpu(res_addr) & 0xFF)
+#define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
+#define RES_LUN(res_addr)    0x0
+
+/* configuration table structure */
+struct pmcraid_config_table {
+        __le16 num_entries;
+        __u8  table_format;
+        __u8  reserved1;
+        __u8  flags;
+        __u8  reserved2[11];
+        struct pmcraid_config_table_entry entries[PMCRAID_MAX_RESOURCES];
+} __attribute__((packed, aligned(4)));
+
+/* config_table.flags value */
+#define MICROCODE_UPDATE_REQUIRED               PMC_BIT32(0)
+
+/*
+ * HCAM format
+ */
+#define PMCRAID_HOSTRCB_LDNSIZE                 4056
+
+/* Error log notification format */
+struct pmcraid_hostrcb_error {
+        __le32 fd_ioasc;
+        __le32 fd_ra;
+        __le32 fd_rh;
+        __le32 prc;
+        union {
+                __u8 data[PMCRAID_HOSTRCB_LDNSIZE];
+        } u;
+} __attribute__ ((packed, aligned(4)));
+
+struct pmcraid_hcam_hdr {
+        __u8  op_code;
+        __u8  notification_type;
+        __u8  notification_lost;
+        __u8  flags;
+        __u8  overlay_id;
+        __u8  reserved1[3];
+        __le32 ilid;
+        __le32 timestamp1;
+        __le32 timestamp2;
+        __le32 data_len;
+} __attribute__((packed, aligned(4)));
+
+#define PMCRAID_AEN_GROUP       0x3
+
+struct pmcraid_hcam_ccn {
+        struct pmcraid_hcam_hdr header;
+        struct pmcraid_config_table_entry cfg_entry;
+} __attribute__((packed, aligned(4)));
+
+struct pmcraid_hcam_ldn {
+        struct pmcraid_hcam_hdr header;
+        struct pmcraid_hostrcb_error error_log;
+} __attribute__((packed, aligned(4)));
+
+/* pmcraid_hcam.op_code values */
+#define HOSTRCB_TYPE_CCN                        0xE1
+#define HOSTRCB_TYPE_LDN                        0xE2
+
+/* pmcraid_hcam.notification_type values */
+#define NOTIFICATION_TYPE_ENTRY_CHANGED         0x0
+#define NOTIFICATION_TYPE_ENTRY_NEW             0x1
+#define NOTIFICATION_TYPE_ENTRY_DELETED         0x2
+#define NOTIFICATION_TYPE_ERROR_LOG             0x10
+#define NOTIFICATION_TYPE_INFORMATION_LOG       0x11
+
+#define HOSTRCB_NOTIFICATIONS_LOST              PMC_BIT8(0)
+
+/* pmcraid_hcam.flags values */
+#define HOSTRCB_INTERNAL_OP_ERROR               PMC_BIT8(0)
+#define HOSTRCB_ERROR_RESPONSE_SENT             PMC_BIT8(1)
+
+/* pmcraid_hcam.overlay_id values */
+#define HOSTRCB_OVERLAY_ID_08                   0x08
+#define HOSTRCB_OVERLAY_ID_09                   0x09
+#define HOSTRCB_OVERLAY_ID_11                   0x11
+#define HOSTRCB_OVERLAY_ID_12                   0x12
+#define HOSTRCB_OVERLAY_ID_13                   0x13
+#define HOSTRCB_OVERLAY_ID_14                   0x14
+#define HOSTRCB_OVERLAY_ID_16                   0x16
+#define HOSTRCB_OVERLAY_ID_17                   0x17
+#define HOSTRCB_OVERLAY_ID_20                   0x20
+#define HOSTRCB_OVERLAY_ID_FF                   0xFF
+
+/* Implementation specific card details */
+struct pmcraid_chip_details {
+        /* hardware register offsets */
+        unsigned long  ioastatus;
+        unsigned long  ioarrin;
+        unsigned long  mailbox;
+        unsigned long  global_intr_mask;
+        unsigned long  ioa_host_intr;
+        unsigned long  ioa_host_intr_clr;
+        unsigned long  ioa_host_mask;
+        unsigned long  ioa_host_mask_clr;
+        unsigned long  host_ioa_intr;
+        unsigned long  host_ioa_intr_clr;
+
+        /* timeout used during transitional to operational state */
+        unsigned long transop_timeout;
+};
+
+/* IOA to HOST doorbells (interrupts) */
+#define INTRS_TRANSITION_TO_OPERATIONAL         PMC_BIT32(0)
+#define INTRS_IOARCB_TRANSFER_FAILED            PMC_BIT32(3)
+#define INTRS_IOA_UNIT_CHECK                    PMC_BIT32(4)
+#define INTRS_NO_HRRQ_FOR_CMD_RESPONSE          PMC_BIT32(5)
+#define INTRS_CRITICAL_OP_IN_PROGRESS           PMC_BIT32(6)
+#define INTRS_IO_DEBUG_ACK                      PMC_BIT32(7)
+#define INTRS_IOARRIN_LOST                      PMC_BIT32(27)
+#define INTRS_SYSTEM_BUS_MMIO_ERROR             PMC_BIT32(28)
+#define INTRS_IOA_PROCESSOR_ERROR               PMC_BIT32(29)
+#define INTRS_HRRQ_VALID                        PMC_BIT32(30)
+#define INTRS_OPERATIONAL_STATUS                PMC_BIT32(0)
+
+/* Host to IOA Doorbells */
+#define DOORBELL_RUNTIME_RESET                  PMC_BIT32(1)
+#define DOORBELL_IOA_RESET_ALERT                PMC_BIT32(7)
+#define DOORBELL_IOA_DEBUG_ALERT                PMC_BIT32(9)
+#define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS       PMC_BIT32(8)
+#define DOORBELL_IOA_START_BIST                 PMC_BIT32(23)
+#define DOORBELL_RESET_IOA                      PMC_BIT32(31)
+
+/* Global interrupt mask register value */
+#define GLOBAL_INTERRUPT_MASK                   0x4ULL
+
+#define PMCRAID_ERROR_INTERRUPTS        (INTRS_IOARCB_TRANSFER_FAILED | \
+                                         INTRS_IOA_UNIT_CHECK | \
+                                         INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
+                                         INTRS_IOARRIN_LOST | \
+                                         INTRS_SYSTEM_BUS_MMIO_ERROR | \
+                                         INTRS_IOA_PROCESSOR_ERROR)
+
+#define PMCRAID_PCI_INTERRUPTS          (PMCRAID_ERROR_INTERRUPTS | \
+                                         INTRS_HRRQ_VALID | \
+                                         INTRS_CRITICAL_OP_IN_PROGRESS |\
+                                         INTRS_TRANSITION_TO_OPERATIONAL)
+
+/* control_block, associated with each of the commands contains IOARCB, IOADLs
+ * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
+ * additional request parameters (of max size 48) any command.
+ */
+struct pmcraid_control_block {
+        struct pmcraid_ioarcb ioarcb;
+        struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
+        struct pmcraid_ioasa ioasa;
+} __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));
+
+/* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
+ */
+struct pmcraid_sglist {
+        u32 order;
+        u32 num_sg;
+        u32 num_dma_sg;
+        u32 buffer_len;
+        struct scatterlist scatterlist[1];
+};
+
+/* pmcraid_cmd - LLD representation of SCSI command */
+struct pmcraid_cmd {
+
+        /* Ptr and bus address of DMA.able control block for this command */
+        struct pmcraid_control_block *ioa_cb;
+        dma_addr_t ioa_cb_bus_addr;
+
+        /* sense buffer for REQUEST SENSE command if firmware is not sending
+         * auto sense data
+         */
+        dma_addr_t sense_buffer_dma;
+        dma_addr_t dma_handle;
+        u8 *sense_buffer;
+
+        /* pointer to mid layer structure of SCSI commands */
+        struct scsi_cmnd *scsi_cmd;
+
+        struct list_head free_list;
+        struct completion wait_for_completion;
+        struct timer_list timer;        /* needed for internal commands */
+        u32 timeout;                    /* current timeout value */
+        u32 index;                      /* index into the command list */
+        u8 completion_req;              /* for handling internal commands */
+        u8 release;                     /* for handling completions */
+
+        void (*cmd_done) (struct pmcraid_cmd *);
+        struct pmcraid_instance *drv_inst;
+
+        struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */
+
+        /* scratch used during reset sequence */
+        union {
+                unsigned long time_left;
+                struct pmcraid_resource_entry *res;
+        } u;
+};
+
+/*
+ * Interrupt registers of IOA
+ */
+struct pmcraid_interrupts {
+        void __iomem *ioa_host_interrupt_reg;
+        void __iomem *ioa_host_interrupt_clr_reg;
+        void __iomem *ioa_host_interrupt_mask_reg;
+        void __iomem *ioa_host_interrupt_mask_clr_reg;
+        void __iomem *global_interrupt_mask_reg;
+        void __iomem *host_ioa_interrupt_reg;
+        void __iomem *host_ioa_interrupt_clr_reg;
+};
+
+/* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
+struct pmcraid_isr_param {
+        u8 hrrq_id;                     /* hrrq entry index */
+        u16 vector;                     /* allocated msi-x vector */
+        struct pmcraid_instance *drv_inst;
+};
+
+/* AEN message header sent as part of event data to applications */
+struct pmcraid_aen_msg {
+        u32 hostno;
+        u32 length;
+        u8  reserved[8];
+        u8  data[0];
+};
+
+struct pmcraid_hostrcb {
+        struct pmcraid_instance *drv_inst;
+        struct pmcraid_aen_msg *msg;
+        struct pmcraid_hcam_hdr *hcam;  /* pointer to hcam buffer */
+        struct pmcraid_cmd  *cmd;       /* pointer to command block used */
+        dma_addr_t baddr;               /* system address of hcam buffer */
+        atomic_t ignore;                /* process HCAM response ? */
+};
+
+#define PMCRAID_AEN_HDR_SIZE    sizeof(struct pmcraid_aen_msg)
+
+
+
+/*
+ * Per adapter structure maintained by LLD
+ */
+struct pmcraid_instance {
+        /* Array of allowed-to-be-exposed resources, initialized from
+         * Configutation Table, later updated with CCNs
+         */
+        struct pmcraid_resource_entry *res_entries;
+
+        struct list_head free_res_q;    /* res_entries lists for easy lookup */
+        struct list_head used_res_q;    /* List of to be exposed resources */
+        spinlock_t resource_lock;       /* spinlock to protect resource list */
+
+        void __iomem *mapped_dma_addr;
+        void __iomem *ioa_status;       /* Iomapped IOA status register */
+        void __iomem *mailbox;          /* Iomapped mailbox register */
+        void __iomem *ioarrin;          /* IOmapped IOARR IN register */
+
+        struct pmcraid_interrupts int_regs;
+        struct pmcraid_chip_details *chip_cfg;
+
+        /* HostRCBs needed for HCAM */
+        struct pmcraid_hostrcb ldn;
+        struct pmcraid_hostrcb ccn;
+
+
+        /* Bus address of start of HRRQ */
+        dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* Pointer to 1st entry of HRRQ */
+        __be32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* Pointer to last entry of HRRQ */
+        __be32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* Pointer to current pointer of hrrq */
+        __be32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* Lock for HRRQ access */
+        spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* Expected toggle bit at host */
+        u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* No of Reset IOA retries . IOA marked dead if threshold exceeds */
+        u8 ioa_reset_attempts;
+#define PMCRAID_RESET_ATTEMPTS 3
+
+        /* Wait Q for  threads to wait for Reset IOA completion */
+        wait_queue_head_t reset_wait_q;
+        struct pmcraid_cmd *reset_cmd;
+
+        /* structures for supporting SIGIO based AEN. */
+        struct fasync_struct *aen_queue;
+        struct mutex aen_queue_lock;    /* lock for aen subscribers list */
+        struct cdev cdev;
+
+        struct Scsi_Host *host; /* mid layer interface structure handle */
+        struct pci_dev *pdev;   /* PCI device structure handle */
+
+        u8  current_log_level;  /* default level for logging IOASC errors */
+
+        u8  num_hrrq;           /* Number of interrupt vectors allocated */
+        dev_t dev;              /* Major-Minor numbers for Char device */
+
+        /* Used as ISR handler argument */
+        struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* configuration table */
+        struct pmcraid_config_table *cfg_table;
+        dma_addr_t cfg_table_bus_addr;
+
+        /* structures related to command blocks */
+        struct kmem_cache *cmd_cachep;          /* cache for cmd blocks */
+        struct pci_pool *control_pool;          /* pool for control blocks */
+        char   cmd_pool_name[64];               /* name of cmd cache */
+        char   ctl_pool_name[64];               /* name of control cache */
+
+        struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];
+
+        struct list_head free_cmd_pool;
+        struct list_head pending_cmd_pool;
+        spinlock_t free_pool_lock;              /* free pool lock */
+        spinlock_t pending_pool_lock;           /* pending pool lock */
+
+        /* No of IO commands pending with FW */
+        atomic_t outstanding_cmds;
+
+        /* should add/delete resources to mid-layer now ?*/
+        atomic_t expose_resources;
+
+        /* Tasklet to handle deferred processing */
+        struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];
+
+        /* Work-queue (Shared) for deferred reset processing */
+        struct work_struct worker_q;
+
+
+        u32 ioa_state:4;        /* For IOA Reset sequence FSM */
+#define IOA_STATE_OPERATIONAL       0x0
+#define IOA_STATE_UNKNOWN           0x1
+#define IOA_STATE_DEAD              0x2
+#define IOA_STATE_IN_SOFT_RESET     0x3
+#define IOA_STATE_IN_HARD_RESET     0x4
+#define IOA_STATE_IN_RESET_ALERT    0x5
+#define IOA_STATE_IN_BRINGDOWN      0x6
+#define IOA_STATE_IN_BRINGUP        0x7
+
+        u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
+        u32 ioa_hard_reset:1;   /* TRUE if Hard Reset is needed */
+        u32 ioa_unit_check:1;   /* Indicates Unit Check condition */
+        u32 ioa_bringdown:1;    /* whether IOA needs to be brought down */
+        u32 force_ioa_reset:1;  /* force adapter reset ? */
+        u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
+        u32 ioa_shutdown_type:2;/* shutdown type used during reset */
+#define SHUTDOWN_NONE               0x0
+#define SHUTDOWN_NORMAL             0x1
+#define SHUTDOWN_ABBREV             0x2
+
+};
+
+/* LLD maintained resource entry structure */
+struct pmcraid_resource_entry {
+        struct list_head queue; /* link to "to be exposed" resources */
+        struct pmcraid_config_table_entry cfg_entry;
+        struct scsi_device *scsi_dev;   /* Link scsi_device structure */
+        atomic_t read_failures;         /* count of failed READ commands */
+        atomic_t write_failures;        /* count of failed WRITE commands */
+
+        /* To indicate add/delete/modify during CCN */
+        u8 change_detected;
+#define RES_CHANGE_ADD          0x1     /* add this to mid-layer */
+#define RES_CHANGE_DEL          0x2     /* remove this from mid-layer */
+
+        u8 reset_progress;      /* Device is resetting */
+
+        /*
+         * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
+         * flag will be set, mid layer will be asked to retry. In the next
+         * attempt, this flag will be checked in queuecommand() to set
+         * SYNC_COMPLETE flag in IOARCB (flag_0).
+         */
+        u8 sync_reqd;
+
+        /* target indicates the mapped target_id assigned to this resource if
+         * this is VSET resource. For non-VSET resources this will be un-used
+         * or zero
+         */
+        u8 target;
+};
+
+/* Data structures used in IOASC error code logging */
+struct pmcraid_ioasc_error {
+        u32 ioasc_code;         /* IOASC code */
+        u8 log_level;           /* default log level assignment. */
+        char *error_string;
+};
+
+/* Initial log_level assignments for various IOASCs */
+#define IOASC_LOG_LEVEL_NONE        0x0 /* no logging */
+#define IOASC_LOG_LEVEL_MUST        0x1 /* must log: all high-severity errors */
+#define IOASC_LOG_LEVEL_HARD        0x2 /* optional – low severity errors */
+
+/* Error information maintained by LLD. LLD initializes the pmcraid_error_table
+ * statically.
+ */
+static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
+        {0x01180600, IOASC_LOG_LEVEL_MUST,
+         "Recovered Error, soft media error, sector reassignment suggested"},
+        {0x015D0000, IOASC_LOG_LEVEL_MUST,
+         "Recovered Error, failure prediction thresold exceeded"},
+        {0x015D9200, IOASC_LOG_LEVEL_MUST,
+         "Recovered Error, soft Cache Card Battery error thresold"},
+        {0x015D9200, IOASC_LOG_LEVEL_MUST,
+         "Recovered Error, soft Cache Card Battery error thresold"},
+        {0x02048000, IOASC_LOG_LEVEL_MUST,
+         "Not Ready, IOA Reset Required"},
+        {0x02408500, IOASC_LOG_LEVEL_MUST,
+         "Not Ready, IOA microcode download required"},
+        {0x03110B00, IOASC_LOG_LEVEL_MUST,
+         "Medium Error, data unreadable, reassignment suggested"},
+        {0x03110C00, IOASC_LOG_LEVEL_MUST,
+         "Medium Error, data unreadable do not reassign"},
+        {0x03310000, IOASC_LOG_LEVEL_MUST,
+         "Medium Error, media corrupted"},
+        {0x04050000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, IOA can't communicate with device"},
+        {0x04080000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, device bus error"},
+        {0x04080000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, device bus is not functioning"},
+        {0x04118000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, IOA reserved area data check"},
+        {0x04118100, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, IOA reserved area invalid data pattern"},
+        {0x04118200, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, IOA reserved area LRC error"},
+        {0x04320000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, reassignment space exhausted"},
+        {0x04330000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, data transfer underlength error"},
+        {0x04330000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, data transfer overlength error"},
+        {0x04418000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, PCI bus error"},
+        {0x04440000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, device error"},
+        {0x04448300, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, undefined device response"},
+        {0x04448400, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, IOA microcode error"},
+        {0x04448600, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, IOA reset required"},
+        {0x04449200, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, hard Cache Fearuee Card Battery error"},
+        {0x0444A000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, failed device altered"},
+        {0x0444A200, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, data check after reassignment"},
+        {0x0444A300, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, LRC error after reassignment"},
+        {0x044A0000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, device bus error (msg/cmd phase)"},
+        {0x04670400, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, new device can't be used"},
+        {0x04678000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, invalid multiadapter configuration"},
+        {0x04678100, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, incorrect connection between enclosures"},
+        {0x04678200, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, connections exceed IOA design limits"},
+        {0x04678300, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, incorrect multipath connection"},
+        {0x04679000, IOASC_LOG_LEVEL_MUST,
+         "Hardware Error, command to LUN failed"},
+        {0x064C8000, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, cache exists for missing/failed device"},
+        {0x06670100, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, incompatible exposed mode device"},
+        {0x06670600, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, attachment of logical unit failed"},
+        {0x06678000, IOASC_LOG_LEVEL_MUST,
+         "Unit Attention, cables exceed connective design limit"},
+        {0x06678300, IOASC_LOG_LEVEL_MUST,
+         "Unit Attention, incomplete multipath connection between" \
+         "IOA and enclosure"},
+        {0x06678400, IOASC_LOG_LEVEL_MUST,
+         "Unit Attention, incomplete multipath connection between" \
+         "device and enclosure"},
+        {0x06678500, IOASC_LOG_LEVEL_MUST,
+         "Unit Attention, incomplete multipath connection between" \
+         "IOA and remote IOA"},
+        {0x06678600, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, missing remote IOA"},
+        {0x06679100, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, enclosure doesn't support required multipath" \
+         "function"},
+        {0x06698200, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, corrupt array parity detected on device"},
+        {0x066B0200, IOASC_LOG_LEVEL_MUST,
+         "Unit Attention, array exposed"},
+        {0x066B8200, IOASC_LOG_LEVEL_HARD,
+         "Unit Attention, exposed array is still protected"},
+        {0x066B9200, IOASC_LOG_LEVEL_MUST,
+         "Unit Attention, Multipath redundancy level got worse"},
+        {0x07270000, IOASC_LOG_LEVEL_HARD,
+         "Data Protect, device is read/write protected by IOA"},
+        {0x07278000, IOASC_LOG_LEVEL_HARD,
+         "Data Protect, IOA doesn't support device attribute"},
+        {0x07278100, IOASC_LOG_LEVEL_HARD,
+         "Data Protect, NVRAM mirroring prohibited"},
+        {0x07278400, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, array is short 2 or more devices"},
+        {0x07278600, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, exposed array is short a required device"},
+        {0x07278700, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, array members not at required addresses"},
+        {0x07278800, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, exposed mode device resource address conflict"},
+        {0x07278900, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, incorrect resource address of exposed mode device"},
+        {0x07278A00, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, Array is missing a device and parity is out of sync"},
+        {0x07278B00, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, maximum number of arrays already exist"},
+        {0x07278C00, IOASC_LOG_LEVEL_HARD,
+         "Data Protect, cannot locate cache data for device"},
+        {0x07278D00, IOASC_LOG_LEVEL_HARD,
+         "Data Protect, cache data exits for a changed device"},
+        {0x07279100, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, detection of a device requiring format"},
+        {0x07279200, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, IOA exceeds maximum number of devices"},
+        {0x07279600, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, missing array, volume set is not functional"},
+        {0x07279700, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, single device for a volume set"},
+        {0x07279800, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, missing multiple devices for a volume set"},
+        {0x07279900, IOASC_LOG_LEVEL_HARD,
+         "Data Protect, maximum number of volument sets already exists"},
+        {0x07279A00, IOASC_LOG_LEVEL_MUST,
+         "Data Protect, other volume set problem"},
+};
+
+/* macros to help in debugging */
+#define pmcraid_err(...)  \
+        printk(KERN_ERR "MaxRAID: "__VA_ARGS__)
+
+#define pmcraid_info(...) \
+        if (pmcraid_debug_log) \
+                printk(KERN_INFO "MaxRAID: "__VA_ARGS__)
+
+/* check if given command is a SCSI READ or SCSI WRITE command */
+#define SCSI_READ_CMD           0x1     /* any of SCSI READ commands */
+#define SCSI_WRITE_CMD          0x2     /* any of SCSI WRITE commands */
+#define SCSI_CMD_TYPE(opcode) \
+({  u8 op = opcode; u8 __type = 0;\
+        if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
+                __type = SCSI_READ_CMD;\
+        else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
+                 op == WRITE_16)\
+                __type = SCSI_WRITE_CMD;\
+        __type;\
+})
+
+#define IS_SCSI_READ_WRITE(opcode) \
+({      u8 __type = SCSI_CMD_TYPE(opcode); \
+        (__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
+})
+
+
+/*
+ * pmcraid_ioctl_header - definition of header structure that preceeds all the
+ * buffers given as ioctl arguements.
+ *
+ * .signature           : always ASCII string, "PMCRAID"
+ * .reserved            : not used
+ * .buffer_length       : length of the buffer following the header
+ */
+struct pmcraid_ioctl_header {
+        u8  signature[8];
+        u32 reserved;
+        u32 buffer_length;
+};
+
+#define PMCRAID_IOCTL_SIGNATURE      "PMCRAID"
+
+
+/*
+ * pmcraid_event_details - defines AEN details that apps can retrieve from LLD
+ *
+ * .rcb_ccn - complete RCB of CCN
+ * .rcb_ldn - complete RCB of CCN
+ */
+struct pmcraid_event_details {
+        struct pmcraid_hcam_ccn rcb_ccn;
+        struct pmcraid_hcam_ldn rcb_ldn;
+};
+
+/*
+ * pmcraid_driver_ioctl_buffer - structure passed as argument to most of the
+ * PMC driver handled ioctls.
+ */
+struct pmcraid_driver_ioctl_buffer {
+        struct pmcraid_ioctl_header ioctl_header;
+        struct pmcraid_event_details event_details;
+};
+
+/*
+ * pmcraid_passthrough_ioctl_buffer - structure given as argument to
+ * passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
+ * 32-byte alignment so, it is necessary to pack this structure to avoid any
+ * holes between ioctl_header and passthrough buffer
+ *
+ * .ioactl_header : ioctl header
+ * .ioarcb        : filled-up ioarcb buffer, driver always reads this buffer
+ * .ioasa         : buffer for ioasa, driver fills this with IOASA from firmware
+ * .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
+ *                  the transfer directions passed in ioarcb.flags0. Contents
+ *                  of this buffer are valid only when ioarcb.data_transfer_len
+ *                  is not zero.
+ */
+struct pmcraid_passthrough_ioctl_buffer {
+        struct pmcraid_ioctl_header ioctl_header;
+        struct pmcraid_ioarcb ioarcb;
+        struct pmcraid_ioasa  ioasa;
+        u8  request_buffer[1];
+} __attribute__ ((packed));
+
+/*
+ * keys to differentiate between driver handled IOCTLs and passthrough
+ * IOCTLs passed to IOA. driver determines the ioctl type using macro
+ * _IOC_TYPE
+ */
+#define PMCRAID_DRIVER_IOCTL         'D'
+#define PMCRAID_PASSTHROUGH_IOCTL    'F'
+
+#define DRV_IOCTL(n, size) \
+    _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))
+
+#define FMW_IOCTL(n, size) \
+    _IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL,  (n), (size))
+
+/*
+ * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
+ * This is to facilitate applications avoiding un-necessary memory allocations.
+ * For example, most of driver handled ioctls do not require ioarcb, ioasa.
+ */
+#define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))
+
+/* Driver handled IOCTL command definitions */
+
+#define PMCRAID_IOCTL_RESET_ADAPTER          \
+        DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))
+
+/* passthrough/firmware handled commands */
+#define PMCRAID_IOCTL_PASSTHROUGH_COMMAND         \
+        FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))
+
+#define PMCRAID_IOCTL_DOWNLOAD_MICROCODE     \
+        FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))
+
+
+#endif /* _PMCRAID_H */
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index 0f8796201504..fbcb82a2f7f4 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -1670,7 +1670,7 @@ qla24xx_vport_create(struct fc_vport *fc_vport, bool disable)
 
         qla24xx_vport_disable(fc_vport, disable);
 
-        if (ql2xmultique_tag) {
+        if (ha->flags.cpu_affinity_enabled) {
                 req = ha->req_q_map[1];
                 goto vport_queue;
         } else if (ql2xmaxqueues == 1 || !ha->npiv_info)
@@ -1736,6 +1736,11 @@ qla24xx_vport_delete(struct fc_vport *fc_vport)
 
         qla24xx_deallocate_vp_id(vha);
 
+        mutex_lock(&ha->vport_lock);
+        ha->cur_vport_count--;
+        clear_bit(vha->vp_idx, ha->vp_idx_map);
+        mutex_unlock(&ha->vport_lock);
+
         if (vha->timer_active) {
                 qla2x00_vp_stop_timer(vha);
                 DEBUG15(printk ("scsi(%ld): timer for the vport[%d] = %p "
@@ -1743,7 +1748,7 @@ qla24xx_vport_delete(struct fc_vport *fc_vport)
                     vha->host_no, vha->vp_idx, vha));
         }
 
-        if (vha->req->id && !ql2xmultique_tag) {
+        if (vha->req->id && !ha->flags.cpu_affinity_enabled) {
                 if (qla25xx_delete_req_que(vha, vha->req) != QLA_SUCCESS)
                         qla_printk(KERN_WARNING, ha,
                                 "Queue delete failed.\n");
diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h
index 00aa48d975a6..215061861794 100644
--- a/drivers/scsi/qla2xxx/qla_def.h
+++ b/drivers/scsi/qla2xxx/qla_def.h
@@ -189,6 +189,7 @@ struct req_que;
  */
 typedef struct srb {
         struct fc_port *fcport;
+        uint32_t handle;
 
         struct scsi_cmnd *cmd;          /* Linux SCSI command pkt */
 
@@ -196,6 +197,8 @@ typedef struct srb {
 
         uint32_t request_sense_length;
         uint8_t *request_sense_ptr;
+
+        void *ctx;
 } srb_t;
 
 /*
@@ -204,6 +207,28 @@ typedef struct srb {
 #define SRB_DMA_VALID           BIT_0   /* Command sent to ISP */
 
 /*
+ * SRB extensions.
+ */
+struct srb_ctx {
+#define SRB_LOGIN_CMD   1
+#define SRB_LOGOUT_CMD  2
+        uint16_t type;
+        struct timer_list timer;
+
+        void (*free)(srb_t *sp);
+        void (*timeout)(srb_t *sp);
+};
+
+struct srb_logio {
+        struct srb_ctx ctx;
+
+#define SRB_LOGIN_RETRIED       BIT_0
+#define SRB_LOGIN_COND_PLOGI    BIT_1
+#define SRB_LOGIN_SKIP_PRLI     BIT_2
+        uint16_t flags;
+};
+
+/*
  * ISP I/O Register Set structure definitions.
  */
 struct device_reg_2xxx {
@@ -1482,7 +1507,7 @@ typedef union {
                 uint8_t domain;
                 uint8_t area;
                 uint8_t al_pa;
-#elif __LITTLE_ENDIAN
+#elif defined(__LITTLE_ENDIAN)
                 uint8_t al_pa;
                 uint8_t area;
                 uint8_t domain;
@@ -1565,6 +1590,7 @@ typedef struct fc_port {
 #define FCF_FABRIC_DEVICE       BIT_0
 #define FCF_LOGIN_NEEDED        BIT_1
 #define FCF_TAPE_PRESENT        BIT_2
+#define FCF_FCP2_DEVICE         BIT_3
 
 /* No loop ID flag. */
 #define FC_NO_LOOP_ID           0x1000
@@ -2093,6 +2119,10 @@ struct qla_msix_entry {
 enum qla_work_type {
         QLA_EVT_AEN,
         QLA_EVT_IDC_ACK,
+        QLA_EVT_ASYNC_LOGIN,
+        QLA_EVT_ASYNC_LOGIN_DONE,
+        QLA_EVT_ASYNC_LOGOUT,
+        QLA_EVT_ASYNC_LOGOUT_DONE,
 };
 
 
@@ -2111,6 +2141,11 @@ struct qla_work_evt {
 #define QLA_IDC_ACK_REGS        7
                         uint16_t mb[QLA_IDC_ACK_REGS];
                 } idc_ack;
+                struct {
+                        struct fc_port *fcport;
+#define QLA_LOGIO_LOGIN_RETRIED BIT_0
+                        u16 data[2];
+                } logio;
         } u;
 };
 
@@ -2224,6 +2259,7 @@ struct qla_hw_data {
                 uint32_t        chip_reset_done         :1;
                 uint32_t        port0                   :1;
                 uint32_t        running_gold_fw         :1;
+                uint32_t        cpu_affinity_enabled    :1;
         } flags;
 
         /* This spinlock is used to protect "io transactions", you must
@@ -2350,6 +2386,7 @@ struct qla_hw_data {
                                 (ha)->flags.msix_enabled)
 #define IS_FAC_REQUIRED(ha)     (IS_QLA81XX(ha))
 #define IS_NOCACHE_VPD_TYPE(ha) (IS_QLA81XX(ha))
+#define IS_ALOGIO_CAPABLE(ha)   (IS_QLA23XX(ha) || IS_FWI2_CAPABLE(ha))
 
 #define IS_IIDMA_CAPABLE(ha)    ((ha)->device_type & DT_IIDMA)
 #define IS_FWI2_CAPABLE(ha)     ((ha)->device_type & DT_FWI2)
diff --git a/drivers/scsi/qla2xxx/qla_fw.h b/drivers/scsi/qla2xxx/qla_fw.h
index dfde2dd865cb..66a8da5d7d08 100644
--- a/drivers/scsi/qla2xxx/qla_fw.h
+++ b/drivers/scsi/qla2xxx/qla_fw.h
@@ -1126,7 +1126,7 @@ struct vp_config_entry_24xx {
         uint16_t id;
         uint16_t reserved_4;
         uint16_t hopct;
-        uint8_t reserved_5;
+        uint8_t reserved_5[2];
 };
 
 #define VP_RPT_ID_IOCB_TYPE     0x32    /* Report ID Acquisition entry. */
diff --git a/drivers/scsi/qla2xxx/qla_gbl.h b/drivers/scsi/qla2xxx/qla_gbl.h
index 65b12d82867c..f3d1d1afa95b 100644
--- a/drivers/scsi/qla2xxx/qla_gbl.h
+++ b/drivers/scsi/qla2xxx/qla_gbl.h
@@ -52,6 +52,14 @@ extern void qla2x00_try_to_stop_firmware(scsi_qla_host_t *);
 
 extern void qla84xx_put_chip(struct scsi_qla_host *);
 
+extern int qla2x00_async_login(struct scsi_qla_host *, fc_port_t *,
+    uint16_t *);
+extern int qla2x00_async_logout(struct scsi_qla_host *, fc_port_t *);
+extern int qla2x00_async_login_done(struct scsi_qla_host *, fc_port_t *,
+    uint16_t *);
+extern int qla2x00_async_logout_done(struct scsi_qla_host *, fc_port_t *,
+    uint16_t *);
+
 /*
  * Global Data in qla_os.c source file.
  */
@@ -76,6 +84,15 @@ extern void qla2x00_abort_all_cmds(scsi_qla_host_t *, int);
 extern int qla2x00_post_aen_work(struct scsi_qla_host *, enum
     fc_host_event_code, u32);
 extern int qla2x00_post_idc_ack_work(struct scsi_qla_host *, uint16_t *);
+extern int qla2x00_post_async_login_work(struct scsi_qla_host *, fc_port_t *,
+    uint16_t *);
+extern int qla2x00_post_async_login_done_work(struct scsi_qla_host *,
+    fc_port_t *, uint16_t *);
+extern int qla2x00_post_async_logout_work(struct scsi_qla_host *, fc_port_t *,
+    uint16_t *);
+extern int qla2x00_post_async_logout_done_work(struct scsi_qla_host *,
+    fc_port_t *, uint16_t *);
+
 extern int qla81xx_restart_mpi_firmware(scsi_qla_host_t *);
 
 extern void qla2x00_abort_fcport_cmds(fc_port_t *);
@@ -83,6 +100,8 @@ extern struct scsi_qla_host *qla2x00_create_host(struct scsi_host_template *,
         struct qla_hw_data *);
 extern void qla2x00_free_host(struct scsi_qla_host *);
 extern void qla2x00_relogin(struct scsi_qla_host *);
+extern void qla2x00_do_work(struct scsi_qla_host *);
+
 /*
  * Global Functions in qla_mid.c source file.
  */
@@ -135,6 +154,7 @@ int qla2x00_marker(struct scsi_qla_host *, struct req_que *, struct rsp_que *,
                                                 uint16_t, uint16_t, uint8_t);
 int __qla2x00_marker(struct scsi_qla_host *, struct req_que *, struct rsp_que *,
                                                 uint16_t, uint16_t, uint8_t);
+extern int qla2x00_start_sp(srb_t *);
 
 /*
  * Global Function Prototypes in qla_mbx.c source file.
diff --git a/drivers/scsi/qla2xxx/qla_gs.c b/drivers/scsi/qla2xxx/qla_gs.c
index 917534b9f221..4647015eba63 100644
--- a/drivers/scsi/qla2xxx/qla_gs.c
+++ b/drivers/scsi/qla2xxx/qla_gs.c
@@ -1674,6 +1674,10 @@ int
 qla2x00_fdmi_register(scsi_qla_host_t *vha)
 {
         int rval;
+       struct qla_hw_data *ha = vha->hw;
+
+        if (IS_QLA2100(ha) || IS_QLA2200(ha))
+                return QLA_FUNCTION_FAILED;
 
         rval = qla2x00_mgmt_svr_login(vha);
         if (rval)
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index f2ce8e3cc91b..9e3eaac25596 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -40,6 +40,210 @@ static struct qla_chip_state_84xx *qla84xx_get_chip(struct scsi_qla_host *);
 static int qla84xx_init_chip(scsi_qla_host_t *);
 static int qla25xx_init_queues(struct qla_hw_data *);
 
+/* SRB Extensions ---------------------------------------------------------- */
+
+static void
+qla2x00_ctx_sp_timeout(unsigned long __data)
+{
+        srb_t *sp = (srb_t *)__data;
+        struct srb_ctx *ctx;
+        fc_port_t *fcport = sp->fcport;
+        struct qla_hw_data *ha = fcport->vha->hw;
+        struct req_que *req;
+        unsigned long flags;
+
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        req = ha->req_q_map[0];
+        req->outstanding_cmds[sp->handle] = NULL;
+        ctx = sp->ctx;
+        ctx->timeout(sp);
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+        ctx->free(sp);
+}
+
+static void
+qla2x00_ctx_sp_free(srb_t *sp)
+{
+        struct srb_ctx *ctx = sp->ctx;
+
+        kfree(ctx);
+        mempool_free(sp, sp->fcport->vha->hw->srb_mempool);
+}
+
+inline srb_t *
+qla2x00_get_ctx_sp(scsi_qla_host_t *vha, fc_port_t *fcport, size_t size,
+    unsigned long tmo)
+{
+        srb_t *sp;
+        struct qla_hw_data *ha = vha->hw;
+        struct srb_ctx *ctx;
+
+        sp = mempool_alloc(ha->srb_mempool, GFP_KERNEL);
+        if (!sp)
+                goto done;
+        ctx = kzalloc(size, GFP_KERNEL);
+        if (!ctx) {
+                mempool_free(sp, ha->srb_mempool);
+                goto done;
+        }
+
+        memset(sp, 0, sizeof(*sp));
+        sp->fcport = fcport;
+        sp->ctx = ctx;
+        ctx->free = qla2x00_ctx_sp_free;
+
+        init_timer(&ctx->timer);
+        if (!tmo)
+                goto done;
+        ctx->timer.expires = jiffies + tmo * HZ;
+        ctx->timer.data = (unsigned long)sp;
+        ctx->timer.function = qla2x00_ctx_sp_timeout;
+        add_timer(&ctx->timer);
+done:
+        return sp;
+}
+
+/* Asynchronous Login/Logout Routines -------------------------------------- */
+
+#define ELS_TMO_2_RATOV(ha) ((ha)->r_a_tov / 10 * 2)
+
+static void
+qla2x00_async_logio_timeout(srb_t *sp)
+{
+        fc_port_t *fcport = sp->fcport;
+        struct srb_logio *lio = sp->ctx;
+
+        DEBUG2(printk(KERN_WARNING
+            "scsi(%ld:%x): Async-%s timeout.\n",
+            fcport->vha->host_no, sp->handle,
+            lio->ctx.type == SRB_LOGIN_CMD ? "login": "logout"));
+
+        if (lio->ctx.type == SRB_LOGIN_CMD)
+                qla2x00_post_async_logout_work(fcport->vha, fcport, NULL);
+}
+
+int
+qla2x00_async_login(struct scsi_qla_host *vha, fc_port_t *fcport,
+    uint16_t *data)
+{
+        struct qla_hw_data *ha = vha->hw;
+        srb_t *sp;
+        struct srb_logio *lio;
+        int rval;
+
+        rval = QLA_FUNCTION_FAILED;
+        sp = qla2x00_get_ctx_sp(vha, fcport, sizeof(struct srb_logio),
+            ELS_TMO_2_RATOV(ha) + 2);
+        if (!sp)
+                goto done;
+
+        lio = sp->ctx;
+        lio->ctx.type = SRB_LOGIN_CMD;
+        lio->ctx.timeout = qla2x00_async_logio_timeout;
+        lio->flags |= SRB_LOGIN_COND_PLOGI;
+        if (data[1] & QLA_LOGIO_LOGIN_RETRIED)
+                lio->flags |= SRB_LOGIN_RETRIED;
+        rval = qla2x00_start_sp(sp);
+        if (rval != QLA_SUCCESS)
+                goto done_free_sp;
+
+        DEBUG2(printk(KERN_DEBUG
+            "scsi(%ld:%x): Async-login - loop-id=%x portid=%02x%02x%02x "
+            "retries=%d.\n", fcport->vha->host_no, sp->handle, fcport->loop_id,
+            fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa,
+            fcport->login_retry));
+        return rval;
+
+done_free_sp:
+        del_timer_sync(&lio->ctx.timer);
+        lio->ctx.free(sp);
+done:
+        return rval;
+}
+
+int
+qla2x00_async_logout(struct scsi_qla_host *vha, fc_port_t *fcport)
+{
+        struct qla_hw_data *ha = vha->hw;
+        srb_t *sp;
+        struct srb_logio *lio;
+        int rval;
+
+        rval = QLA_FUNCTION_FAILED;
+        sp = qla2x00_get_ctx_sp(vha, fcport, sizeof(struct srb_logio),
+            ELS_TMO_2_RATOV(ha) + 2);
+        if (!sp)
+                goto done;
+
+        lio = sp->ctx;
+        lio->ctx.type = SRB_LOGOUT_CMD;
+        lio->ctx.timeout = qla2x00_async_logio_timeout;
+        rval = qla2x00_start_sp(sp);
+        if (rval != QLA_SUCCESS)
+                goto done_free_sp;
+
+        DEBUG2(printk(KERN_DEBUG
+            "scsi(%ld:%x): Async-logout - loop-id=%x portid=%02x%02x%02x.\n",
+            fcport->vha->host_no, sp->handle, fcport->loop_id,
+            fcport->d_id.b.domain, fcport->d_id.b.area, fcport->d_id.b.al_pa));
+        return rval;
+
+done_free_sp:
+        del_timer_sync(&lio->ctx.timer);
+        lio->ctx.free(sp);
+done:
+        return rval;
+}
+
+int
+qla2x00_async_login_done(struct scsi_qla_host *vha, fc_port_t *fcport,
+    uint16_t *data)
+{
+        int rval;
+        uint8_t opts = 0;
+
+        switch (data[0]) {
+        case MBS_COMMAND_COMPLETE:
+                if (fcport->flags & FCF_TAPE_PRESENT)
+                        opts |= BIT_1;
+                rval = qla2x00_get_port_database(vha, fcport, opts);
+                if (rval != QLA_SUCCESS)
+                        qla2x00_mark_device_lost(vha, fcport, 1, 0);
+                else
+                        qla2x00_update_fcport(vha, fcport);
+                break;
+        case MBS_COMMAND_ERROR:
+                if (data[1] & QLA_LOGIO_LOGIN_RETRIED)
+                        set_bit(RELOGIN_NEEDED, &vha->dpc_flags);
+                else
+                        qla2x00_mark_device_lost(vha, fcport, 1, 0);
+                break;
+        case MBS_PORT_ID_USED:
+                fcport->loop_id = data[1];
+                qla2x00_post_async_login_work(vha, fcport, NULL);
+                break;
+        case MBS_LOOP_ID_USED:
+                fcport->loop_id++;
+                rval = qla2x00_find_new_loop_id(vha, fcport);
+                if (rval != QLA_SUCCESS) {
+                        qla2x00_mark_device_lost(vha, fcport, 1, 0);
+                        break;
+                }
+                qla2x00_post_async_login_work(vha, fcport, NULL);
+                break;
+        }
+        return QLA_SUCCESS;
+}
+
+int
+qla2x00_async_logout_done(struct scsi_qla_host *vha, fc_port_t *fcport,
+    uint16_t *data)
+{
+        qla2x00_mark_device_lost(vha, fcport, 1, 0);
+        return QLA_SUCCESS;
+}
+
 /****************************************************************************/
 /*                QLogic ISP2x00 Hardware Support Functions.                */
 /****************************************************************************/
@@ -987,7 +1191,6 @@ qla2x00_setup_chip(scsi_qla_host_t *vha)
                                     ha->phy_version);
                                 if (rval != QLA_SUCCESS)
                                         goto failed;
-
                                 ha->flags.npiv_supported = 0;
                                 if (IS_QLA2XXX_MIDTYPE(ha) &&
                                          (ha->fw_attributes & BIT_2)) {
@@ -1591,7 +1794,8 @@ qla2x00_set_model_info(scsi_qla_host_t *vha, uint8_t *model, size_t len,
         char *st, *en;
         uint16_t index;
         struct qla_hw_data *ha = vha->hw;
-        int use_tbl = !IS_QLA25XX(ha) && !IS_QLA81XX(ha);
+        int use_tbl = !IS_QLA24XX_TYPE(ha) && !IS_QLA25XX(ha) &&
+            !IS_QLA81XX(ha);
 
         if (memcmp(model, BINZERO, len) != 0) {
                 strncpy(ha->model_number, model, len);
@@ -1978,7 +2182,7 @@ qla2x00_rport_del(void *data)
         struct fc_rport *rport;
 
         spin_lock_irq(fcport->vha->host->host_lock);
-        rport = fcport->drport;
+        rport = fcport->drport ? fcport->drport: fcport->rport;
         fcport->drport = NULL;
         spin_unlock_irq(fcport->vha->host->host_lock);
         if (rport)
@@ -2345,8 +2549,7 @@ qla2x00_reg_remote_port(scsi_qla_host_t *vha, fc_port_t *fcport)
         struct fc_rport *rport;
         struct qla_hw_data *ha = vha->hw;
 
-        if (fcport->drport)
-                qla2x00_rport_del(fcport);
+        qla2x00_rport_del(fcport);
 
         rport_ids.node_name = wwn_to_u64(fcport->node_name);
         rport_ids.port_name = wwn_to_u64(fcport->port_name);
@@ -3039,6 +3242,12 @@ qla2x00_fabric_dev_login(scsi_qla_host_t *vha, fc_port_t *fcport,
         rval = QLA_SUCCESS;
         retry = 0;
 
+        if (IS_ALOGIO_CAPABLE(ha)) {
+                rval = qla2x00_post_async_login_work(vha, fcport, NULL);
+                if (!rval)
+                        return rval;
+        }
+
         rval = qla2x00_fabric_login(vha, fcport, next_loopid);
         if (rval == QLA_SUCCESS) {
                 /* Send an ADISC to tape devices.*/
@@ -3133,7 +3342,7 @@ qla2x00_fabric_login(scsi_qla_host_t *vha, fc_port_t *fcport,
                         } else {
                                 fcport->port_type = FCT_TARGET;
                                 if (mb[1] & BIT_1) {
-                                        fcport->flags |= FCF_TAPE_PRESENT;
+                                        fcport->flags |= FCF_FCP2_DEVICE;
                                 }
                         }
 
@@ -3244,7 +3453,7 @@ qla2x00_loop_resync(scsi_qla_host_t *vha)
         struct req_que *req;
         struct rsp_que *rsp;
 
-        if (ql2xmultique_tag)
+        if (vha->hw->flags.cpu_affinity_enabled)
                 req = vha->hw->req_q_map[0];
         else
                 req = vha->req;
@@ -3286,15 +3495,17 @@ qla2x00_loop_resync(scsi_qla_host_t *vha)
 }
 
 void
-qla2x00_update_fcports(scsi_qla_host_t *vha)
+qla2x00_update_fcports(scsi_qla_host_t *base_vha)
 {
         fc_port_t *fcport;
+        struct scsi_qla_host *tvp, *vha;
 
         /* Go with deferred removal of rport references. */
-        list_for_each_entry(fcport, &vha->vp_fcports, list)
-                if (fcport && fcport->drport &&
-                    atomic_read(&fcport->state) != FCS_UNCONFIGURED)
-                        qla2x00_rport_del(fcport);
+        list_for_each_entry_safe(vha, tvp, &base_vha->hw->vp_list, list)
+                list_for_each_entry(fcport, &vha->vp_fcports, list)
+                        if (fcport && fcport->drport &&
+                            atomic_read(&fcport->state) != FCS_UNCONFIGURED)
+                                qla2x00_rport_del(fcport);
 }
 
 /*
@@ -3331,8 +3542,6 @@ qla2x00_abort_isp(scsi_qla_host_t *vha)
                 if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
                         atomic_set(&vha->loop_state, LOOP_DOWN);
                         qla2x00_mark_all_devices_lost(vha, 0);
-                        list_for_each_entry_safe(vp, tvp, &ha->vp_list, list)
-                               qla2x00_mark_all_devices_lost(vp, 0);
                 } else {
                         if (!atomic_read(&vha->loop_down_timer))
                                 atomic_set(&vha->loop_down_timer,
@@ -4264,7 +4473,7 @@ qla24xx_configure_vhba(scsi_qla_host_t *vha)
                 return -EINVAL;
 
         rval = qla2x00_fw_ready(base_vha);
-        if (ql2xmultique_tag)
+        if (ha->flags.cpu_affinity_enabled)
                 req = ha->req_q_map[0];
         else
                 req = vha->req;
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index 13396beae2ce..c5ccac0bef76 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -350,6 +350,7 @@ qla2x00_start_scsi(srb_t *sp)
         /* Build command packet */
         req->current_outstanding_cmd = handle;
         req->outstanding_cmds[handle] = sp;
+        sp->handle = handle;
         sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
         req->cnt -= req_cnt;
 
@@ -778,6 +779,7 @@ qla24xx_start_scsi(srb_t *sp)
         /* Build command packet. */
         req->current_outstanding_cmd = handle;
         req->outstanding_cmds[handle] = sp;
+        sp->handle = handle;
         sp->cmd->host_scribble = (unsigned char *)(unsigned long)handle;
         req->cnt -= req_cnt;
 
@@ -852,9 +854,211 @@ static void qla25xx_set_que(srb_t *sp, struct rsp_que **rsp)
         struct qla_hw_data *ha = sp->fcport->vha->hw;
         int affinity = cmd->request->cpu;
 
-        if (ql2xmultique_tag && affinity >= 0 &&
+        if (ha->flags.cpu_affinity_enabled && affinity >= 0 &&
                 affinity < ha->max_rsp_queues - 1)
                 *rsp = ha->rsp_q_map[affinity + 1];
          else
                 *rsp = ha->rsp_q_map[0];
 }
+
+/* Generic Control-SRB manipulation functions. */
+
+static void *
+qla2x00_alloc_iocbs(srb_t *sp)
+{
+        scsi_qla_host_t *vha = sp->fcport->vha;
+        struct qla_hw_data *ha = vha->hw;
+        struct req_que *req = ha->req_q_map[0];
+        device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
+        uint32_t index, handle;
+        request_t *pkt;
+        uint16_t cnt, req_cnt;
+
+        pkt = NULL;
+        req_cnt = 1;
+
+        /* Check for room in outstanding command list. */
+        handle = req->current_outstanding_cmd;
+        for (index = 1; index < MAX_OUTSTANDING_COMMANDS; index++) {
+                handle++;
+                if (handle == MAX_OUTSTANDING_COMMANDS)
+                        handle = 1;
+                if (!req->outstanding_cmds[handle])
+                        break;
+        }
+        if (index == MAX_OUTSTANDING_COMMANDS)
+                goto queuing_error;
+
+        /* Check for room on request queue. */
+        if (req->cnt < req_cnt) {
+                if (ha->mqenable)
+                        cnt = RD_REG_DWORD(&reg->isp25mq.req_q_out);
+                else if (IS_FWI2_CAPABLE(ha))
+                        cnt = RD_REG_DWORD(&reg->isp24.req_q_out);
+                else
+                        cnt = qla2x00_debounce_register(
+                            ISP_REQ_Q_OUT(ha, &reg->isp));
+
+                if  (req->ring_index < cnt)
+                        req->cnt = cnt - req->ring_index;
+                else
+                        req->cnt = req->length -
+                            (req->ring_index - cnt);
+        }
+        if (req->cnt < req_cnt)
+                goto queuing_error;
+
+        /* Prep packet */
+        req->current_outstanding_cmd = handle;
+        req->outstanding_cmds[handle] = sp;
+        req->cnt -= req_cnt;
+
+        pkt = req->ring_ptr;
+        memset(pkt, 0, REQUEST_ENTRY_SIZE);
+        pkt->entry_count = req_cnt;
+        pkt->handle = handle;
+        sp->handle = handle;
+
+queuing_error:
+        return pkt;
+}
+
+static void
+qla2x00_start_iocbs(srb_t *sp)
+{
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+        struct req_que *req = ha->req_q_map[0];
+        device_reg_t __iomem *reg = ISP_QUE_REG(ha, req->id);
+        struct device_reg_2xxx __iomem *ioreg = &ha->iobase->isp;
+
+        /* Adjust ring index. */
+        req->ring_index++;
+        if (req->ring_index == req->length) {
+                req->ring_index = 0;
+                req->ring_ptr = req->ring;
+        } else
+                req->ring_ptr++;
+
+        /* Set chip new ring index. */
+        if (ha->mqenable) {
+                WRT_REG_DWORD(&reg->isp25mq.req_q_in, req->ring_index);
+                RD_REG_DWORD(&ioreg->hccr);
+        } else if (IS_FWI2_CAPABLE(ha)) {
+                WRT_REG_DWORD(&reg->isp24.req_q_in, req->ring_index);
+                RD_REG_DWORD_RELAXED(&reg->isp24.req_q_in);
+        } else {
+                WRT_REG_WORD(ISP_REQ_Q_IN(ha, &reg->isp), req->ring_index);
+                RD_REG_WORD_RELAXED(ISP_REQ_Q_IN(ha, &reg->isp));
+        }
+}
+
+static void
+qla24xx_login_iocb(srb_t *sp, struct logio_entry_24xx *logio)
+{
+        struct srb_logio *lio = sp->ctx;
+
+        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
+        logio->control_flags = cpu_to_le16(LCF_COMMAND_PLOGI);
+        if (lio->flags & SRB_LOGIN_COND_PLOGI)
+                logio->control_flags |= cpu_to_le16(LCF_COND_PLOGI);
+        if (lio->flags & SRB_LOGIN_SKIP_PRLI)
+                logio->control_flags |= cpu_to_le16(LCF_SKIP_PRLI);
+        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
+        logio->port_id[1] = sp->fcport->d_id.b.area;
+        logio->port_id[2] = sp->fcport->d_id.b.domain;
+        logio->vp_index = sp->fcport->vp_idx;
+}
+
+static void
+qla2x00_login_iocb(srb_t *sp, struct mbx_entry *mbx)
+{
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+        struct srb_logio *lio = sp->ctx;
+        uint16_t opts;
+
+        mbx->entry_type = MBX_IOCB_TYPE;;
+        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
+        mbx->mb0 = cpu_to_le16(MBC_LOGIN_FABRIC_PORT);
+        opts = lio->flags & SRB_LOGIN_COND_PLOGI ? BIT_0: 0;
+        opts |= lio->flags & SRB_LOGIN_SKIP_PRLI ? BIT_1: 0;
+        if (HAS_EXTENDED_IDS(ha)) {
+                mbx->mb1 = cpu_to_le16(sp->fcport->loop_id);
+                mbx->mb10 = cpu_to_le16(opts);
+        } else {
+                mbx->mb1 = cpu_to_le16((sp->fcport->loop_id << 8) | opts);
+        }
+        mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
+        mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
+            sp->fcport->d_id.b.al_pa);
+        mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
+}
+
+static void
+qla24xx_logout_iocb(srb_t *sp, struct logio_entry_24xx *logio)
+{
+        logio->entry_type = LOGINOUT_PORT_IOCB_TYPE;
+        logio->control_flags =
+            cpu_to_le16(LCF_COMMAND_LOGO|LCF_IMPL_LOGO);
+        logio->nport_handle = cpu_to_le16(sp->fcport->loop_id);
+        logio->port_id[0] = sp->fcport->d_id.b.al_pa;
+        logio->port_id[1] = sp->fcport->d_id.b.area;
+        logio->port_id[2] = sp->fcport->d_id.b.domain;
+        logio->vp_index = sp->fcport->vp_idx;
+}
+
+static void
+qla2x00_logout_iocb(srb_t *sp, struct mbx_entry *mbx)
+{
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+
+        mbx->entry_type = MBX_IOCB_TYPE;;
+        SET_TARGET_ID(ha, mbx->loop_id, sp->fcport->loop_id);
+        mbx->mb0 = cpu_to_le16(MBC_LOGOUT_FABRIC_PORT);
+        mbx->mb1 = HAS_EXTENDED_IDS(ha) ?
+            cpu_to_le16(sp->fcport->loop_id):
+            cpu_to_le16(sp->fcport->loop_id << 8);
+        mbx->mb2 = cpu_to_le16(sp->fcport->d_id.b.domain);
+        mbx->mb3 = cpu_to_le16(sp->fcport->d_id.b.area << 8 |
+            sp->fcport->d_id.b.al_pa);
+        mbx->mb9 = cpu_to_le16(sp->fcport->vp_idx);
+        /* Implicit: mbx->mbx10 = 0. */
+}
+
+int
+qla2x00_start_sp(srb_t *sp)
+{
+        int rval;
+        struct qla_hw_data *ha = sp->fcport->vha->hw;
+        void *pkt;
+        struct srb_ctx *ctx = sp->ctx;
+        unsigned long flags;
+
+        rval = QLA_FUNCTION_FAILED;
+        spin_lock_irqsave(&ha->hardware_lock, flags);
+        pkt = qla2x00_alloc_iocbs(sp);
+        if (!pkt)
+                goto done;
+
+        rval = QLA_SUCCESS;
+        switch (ctx->type) {
+        case SRB_LOGIN_CMD:
+                IS_FWI2_CAPABLE(ha) ?
+                    qla24xx_login_iocb(sp, pkt):
+                    qla2x00_login_iocb(sp, pkt);
+                break;
+        case SRB_LOGOUT_CMD:
+                IS_FWI2_CAPABLE(ha) ?
+                    qla24xx_logout_iocb(sp, pkt):
+                    qla2x00_logout_iocb(sp, pkt);
+                break;
+        default:
+                break;
+        }
+
+        wmb();
+        qla2x00_start_iocbs(sp);
+done:
+        spin_unlock_irqrestore(&ha->hardware_lock, flags);
+        return rval;
+}
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c
index 245e7afb4c4d..b20a7169aac2 100644
--- a/drivers/scsi/qla2xxx/qla_isr.c
+++ b/drivers/scsi/qla2xxx/qla_isr.c
@@ -598,9 +598,54 @@ skip_rio:
                 break;
 
         case MBA_PORT_UPDATE:           /* Port database update */
-                /* Only handle SCNs for our Vport index. */
-                if (vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
+                /*
+                 * Handle only global and vn-port update events
+                 *
+                 * Relevant inputs:
+                 * mb[1] = N_Port handle of changed port
+                 * OR 0xffff for global event
+                 * mb[2] = New login state
+                 * 7 = Port logged out
+                 * mb[3] = LSB is vp_idx, 0xff = all vps
+                 *
+                 * Skip processing if:
+                 *       Event is global, vp_idx is NOT all vps,
+                 *           vp_idx does not match
+                 *       Event is not global, vp_idx does not match
+                 */
+                if ((mb[1] == 0xffff && (mb[3] & 0xff) != 0xff)
+                        || (mb[1] != 0xffff)) {
+                        if (vha->vp_idx != (mb[3] & 0xff))
+                                break;
+                }
+
+                /* Global event -- port logout or port unavailable. */
+                if (mb[1] == 0xffff && mb[2] == 0x7) {
+                        DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
+                            vha->host_no));
+                        DEBUG(printk(KERN_INFO
+                            "scsi(%ld): Port unavailable %04x %04x %04x.\n",
+                            vha->host_no, mb[1], mb[2], mb[3]));
+
+                        if (atomic_read(&vha->loop_state) != LOOP_DOWN) {
+                                atomic_set(&vha->loop_state, LOOP_DOWN);
+                                atomic_set(&vha->loop_down_timer,
+                                    LOOP_DOWN_TIME);
+                                vha->device_flags |= DFLG_NO_CABLE;
+                                qla2x00_mark_all_devices_lost(vha, 1);
+                        }
+
+                        if (vha->vp_idx) {
+                                atomic_set(&vha->vp_state, VP_FAILED);
+                                fc_vport_set_state(vha->fc_vport,
+                                    FC_VPORT_FAILED);
+                                qla2x00_mark_all_devices_lost(vha, 1);
+                        }
+
+                        vha->flags.management_server_logged_in = 0;
+                        ha->link_data_rate = PORT_SPEED_UNKNOWN;
                         break;
+                }
 
                 /*
                  * If PORT UPDATE is global (received LIP_OCCURRED/LIP_RESET
@@ -640,8 +685,9 @@ skip_rio:
                 if (vha->vp_idx && test_bit(VP_SCR_NEEDED, &vha->vp_flags))
                         break;
                 /* Only handle SCNs for our Vport index. */
-                if (vha->vp_idx && vha->vp_idx != (mb[3] & 0xff))
+                if (ha->flags.npiv_supported && vha->vp_idx != (mb[3] & 0xff))
                         break;
+
                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
                     vha->host_no));
                 DEBUG(printk(KERN_INFO
@@ -874,6 +920,249 @@ qla2x00_process_completed_request(struct scsi_qla_host *vha,
         }
 }
 
+static srb_t *
+qla2x00_get_sp_from_handle(scsi_qla_host_t *vha, const char *func,
+    struct req_que *req, void *iocb)
+{
+        struct qla_hw_data *ha = vha->hw;
+        sts_entry_t *pkt = iocb;
+        srb_t *sp = NULL;
+        uint16_t index;
+
+        index = LSW(pkt->handle);
+        if (index >= MAX_OUTSTANDING_COMMANDS) {
+                qla_printk(KERN_WARNING, ha,
+                    "%s: Invalid completion handle (%x).\n", func, index);
+                set_bit(ISP_ABORT_NEEDED, &vha->dpc_flags);
+                goto done;
+        }
+        sp = req->outstanding_cmds[index];
+        if (!sp) {
+                qla_printk(KERN_WARNING, ha,
+                    "%s: Invalid completion handle (%x) -- timed-out.\n", func,
+                    index);
+                return sp;
+        }
+        if (sp->handle != index) {
+                qla_printk(KERN_WARNING, ha,
+                    "%s: SRB handle (%x) mismatch %x.\n", func, sp->handle,
+                    index);
+                return NULL;
+        }
+        req->outstanding_cmds[index] = NULL;
+done:
+        return sp;
+}
+
+static void
+qla2x00_mbx_iocb_entry(scsi_qla_host_t *vha, struct req_que *req,
+    struct mbx_entry *mbx)
+{
+        const char func[] = "MBX-IOCB";
+        const char *type;
+        struct qla_hw_data *ha = vha->hw;
+        fc_port_t *fcport;
+        srb_t *sp;
+        struct srb_logio *lio;
+        uint16_t data[2];
+
+        sp = qla2x00_get_sp_from_handle(vha, func, req, mbx);
+        if (!sp)
+                return;
+
+        type = NULL;
+        lio = sp->ctx;
+        switch (lio->ctx.type) {
+        case SRB_LOGIN_CMD:
+                type = "login";
+                break;
+        case SRB_LOGOUT_CMD:
+                type = "logout";
+                break;
+        default:
+                qla_printk(KERN_WARNING, ha,
+                    "%s: Unrecognized SRB: (%p) type=%d.\n", func, sp,
+                    lio->ctx.type);
+                return;
+        }
+
+        del_timer(&lio->ctx.timer);
+        fcport = sp->fcport;
+
+        data[0] = data[1] = 0;
+        if (mbx->entry_status) {
+                DEBUG2(printk(KERN_WARNING
+                    "scsi(%ld:%x): Async-%s error entry - entry-status=%x "
+                    "status=%x state-flag=%x status-flags=%x.\n",
+                    fcport->vha->host_no, sp->handle, type,
+                    mbx->entry_status, le16_to_cpu(mbx->status),
+                    le16_to_cpu(mbx->state_flags),
+                    le16_to_cpu(mbx->status_flags)));
+                DEBUG2(qla2x00_dump_buffer((uint8_t *)mbx, sizeof(*mbx)));
+
+                data[0] = MBS_COMMAND_ERROR;
+                data[1] = lio->flags & SRB_LOGIN_RETRIED ?
+                    QLA_LOGIO_LOGIN_RETRIED: 0;
+                goto done_post_logio_done_work;
+        }
+
+        if (!mbx->status && le16_to_cpu(mbx->mb0) == MBS_COMMAND_COMPLETE) {
+                DEBUG2(printk(KERN_DEBUG
+                    "scsi(%ld:%x): Async-%s complete - mbx1=%x.\n",
+                    fcport->vha->host_no, sp->handle, type,
+                    le16_to_cpu(mbx->mb1)));
+
+                data[0] = MBS_COMMAND_COMPLETE;
+                if (lio->ctx.type == SRB_LOGIN_CMD && le16_to_cpu(mbx->mb1) & BIT_1)
+                        fcport->flags |= FCF_FCP2_DEVICE;
+
+                goto done_post_logio_done_work;
+        }
+
+        data[0] = le16_to_cpu(mbx->mb0);
+        switch (data[0]) {
+        case MBS_PORT_ID_USED:
+                data[1] = le16_to_cpu(mbx->mb1);
+                break;
+        case MBS_LOOP_ID_USED:
+                break;
+        default:
+                data[0] = MBS_COMMAND_ERROR;
+                data[1] = lio->flags & SRB_LOGIN_RETRIED ?
+                    QLA_LOGIO_LOGIN_RETRIED: 0;
+                break;
+        }
+
+        DEBUG2(printk(KERN_WARNING
+            "scsi(%ld:%x): Async-%s failed - status=%x mb0=%x mb1=%x mb2=%x "
+            "mb6=%x mb7=%x.\n",
+            fcport->vha->host_no, sp->handle, type, le16_to_cpu(mbx->status),
+            le16_to_cpu(mbx->mb0), le16_to_cpu(mbx->mb1),
+            le16_to_cpu(mbx->mb2), le16_to_cpu(mbx->mb6),
+            le16_to_cpu(mbx->mb7)));
+
+done_post_logio_done_work:
+        lio->ctx.type == SRB_LOGIN_CMD ?
+            qla2x00_post_async_login_done_work(fcport->vha, fcport, data):
+            qla2x00_post_async_logout_done_work(fcport->vha, fcport, data);
+
+        lio->ctx.free(sp);
+}
+
+static void
+qla24xx_logio_entry(scsi_qla_host_t *vha, struct req_que *req,
+    struct logio_entry_24xx *logio)
+{
+        const char func[] = "LOGIO-IOCB";
+        const char *type;
+        struct qla_hw_data *ha = vha->hw;
+        fc_port_t *fcport;
+        srb_t *sp;
+        struct srb_logio *lio;
+        uint16_t data[2];
+        uint32_t iop[2];
+
+        sp = qla2x00_get_sp_from_handle(vha, func, req, logio);
+        if (!sp)
+                return;
+
+        type = NULL;
+        lio = sp->ctx;
+        switch (lio->ctx.type) {
+        case SRB_LOGIN_CMD:
+                type = "login";
+                break;
+        case SRB_LOGOUT_CMD:
+                type = "logout";
+                break;
+        default:
+                qla_printk(KERN_WARNING, ha,
+                    "%s: Unrecognized SRB: (%p) type=%d.\n", func, sp,
+                    lio->ctx.type);
+                return;
+        }
+
+        del_timer(&lio->ctx.timer);
+        fcport = sp->fcport;
+
+        data[0] = data[1] = 0;
+        if (logio->entry_status) {
+                DEBUG2(printk(KERN_WARNING
+                    "scsi(%ld:%x): Async-%s error entry - entry-status=%x.\n",
+                    fcport->vha->host_no, sp->handle, type,
+                    logio->entry_status));
+                DEBUG2(qla2x00_dump_buffer((uint8_t *)logio, sizeof(*logio)));
+
+                data[0] = MBS_COMMAND_ERROR;
+                data[1] = lio->flags & SRB_LOGIN_RETRIED ?
+                    QLA_LOGIO_LOGIN_RETRIED: 0;
+                goto done_post_logio_done_work;
+        }
+
+        if (le16_to_cpu(logio->comp_status) == CS_COMPLETE) {
+                DEBUG2(printk(KERN_DEBUG
+                    "scsi(%ld:%x): Async-%s complete - iop0=%x.\n",
+                    fcport->vha->host_no, sp->handle, type,
+                    le32_to_cpu(logio->io_parameter[0])));
+
+                data[0] = MBS_COMMAND_COMPLETE;
+                if (lio->ctx.type == SRB_LOGOUT_CMD)
+                        goto done_post_logio_done_work;
+
+                iop[0] = le32_to_cpu(logio->io_parameter[0]);
+                if (iop[0] & BIT_4) {
+                        fcport->port_type = FCT_TARGET;
+                        if (iop[0] & BIT_8)
+                                fcport->flags |= FCF_FCP2_DEVICE;
+                }
+                if (iop[0] & BIT_5)
+                        fcport->port_type = FCT_INITIATOR;
+                if (logio->io_parameter[7] || logio->io_parameter[8])
+                        fcport->supported_classes |= FC_COS_CLASS2;
+                if (logio->io_parameter[9] || logio->io_parameter[10])
+                        fcport->supported_classes |= FC_COS_CLASS3;
+
+                goto done_post_logio_done_work;
+        }
+
+        iop[0] = le32_to_cpu(logio->io_parameter[0]);
+        iop[1] = le32_to_cpu(logio->io_parameter[1]);
+        switch (iop[0]) {
+        case LSC_SCODE_PORTID_USED:
+                data[0] = MBS_PORT_ID_USED;
+                data[1] = LSW(iop[1]);
+                break;
+        case LSC_SCODE_NPORT_USED:
+                data[0] = MBS_LOOP_ID_USED;
+                break;
+        case LSC_SCODE_CMD_FAILED:
+                if ((iop[1] & 0xff) == 0x05) {
+                        data[0] = MBS_NOT_LOGGED_IN;
+                        break;
+                }
+                /* Fall through. */
+        default:
+                data[0] = MBS_COMMAND_ERROR;
+                data[1] = lio->flags & SRB_LOGIN_RETRIED ?
+                    QLA_LOGIO_LOGIN_RETRIED: 0;
+                break;
+        }
+
+        DEBUG2(printk(KERN_WARNING
+            "scsi(%ld:%x): Async-%s failed - comp=%x iop0=%x iop1=%x.\n",
+            fcport->vha->host_no, sp->handle, type,
+            le16_to_cpu(logio->comp_status),
+            le32_to_cpu(logio->io_parameter[0]),
+            le32_to_cpu(logio->io_parameter[1])));
+
+done_post_logio_done_work:
+        lio->ctx.type == SRB_LOGIN_CMD ?
+            qla2x00_post_async_login_done_work(fcport->vha, fcport, data):
+            qla2x00_post_async_logout_done_work(fcport->vha, fcport, data);
+
+        lio->ctx.free(sp);
+}
+
 /**
  * qla2x00_process_response_queue() - Process response queue entries.
  * @ha: SCSI driver HA context
@@ -935,6 +1224,9 @@ qla2x00_process_response_queue(struct rsp_que *rsp)
                 case STATUS_CONT_TYPE:
                         qla2x00_status_cont_entry(rsp, (sts_cont_entry_t *)pkt);
                         break;
+                case MBX_IOCB_TYPE:
+                        qla2x00_mbx_iocb_entry(vha, rsp->req,
+                            (struct mbx_entry *)pkt);
                 default:
                         /* Type Not Supported. */
                         DEBUG4(printk(KERN_WARNING
@@ -1223,6 +1515,7 @@ qla2x00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
                                         cp->device->id, cp->device->lun, resid,
                                         scsi_bufflen(cp)));
 
+                                scsi_set_resid(cp, resid);
                                 cp->result = DID_ERROR << 16;
                                 break;
                         }
@@ -1544,6 +1837,10 @@ void qla24xx_process_response_queue(struct scsi_qla_host *vha,
                         qla24xx_report_id_acquisition(vha,
                             (struct vp_rpt_id_entry_24xx *)pkt);
                         break;
+                case LOGINOUT_PORT_IOCB_TYPE:
+                        qla24xx_logio_entry(vha, rsp->req,
+                            (struct logio_entry_24xx *)pkt);
+                        break;
                 default:
                         /* Type Not Supported. */
                         DEBUG4(printk(KERN_WARNING
@@ -1723,8 +2020,10 @@ qla24xx_msix_rsp_q(int irq, void *dev_id)
 
         vha = qla25xx_get_host(rsp);
         qla24xx_process_response_queue(vha, rsp);
-        WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
-
+        if (!ha->mqenable) {
+                WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
+                RD_REG_DWORD_RELAXED(&reg->hccr);
+        }
         spin_unlock_irq(&ha->hardware_lock);
 
         return IRQ_HANDLED;
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index fe69f3057671..b6202fe118ac 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -1507,7 +1507,7 @@ qla24xx_login_fabric(scsi_qla_host_t *vha, uint16_t loop_id, uint8_t domain,
 
         DEBUG11(printk("%s(%ld): entered.\n", __func__, vha->host_no));
 
-        if (ql2xmultique_tag)
+        if (ha->flags.cpu_affinity_enabled)
                 req = ha->req_q_map[0];
         else
                 req = vha->req;
@@ -2324,7 +2324,7 @@ __qla24xx_issue_tmf(char *name, uint32_t type, struct fc_port *fcport,
         vha = fcport->vha;
         ha = vha->hw;
         req = vha->req;
-        if (ql2xmultique_tag)
+        if (ha->flags.cpu_affinity_enabled)
                 rsp = ha->rsp_q_map[tag + 1];
         else
                 rsp = req->rsp;
@@ -2746,7 +2746,8 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
         if (rptid_entry->format == 0) {
                 DEBUG15(printk("%s:format 0 : scsi(%ld) number of VPs setup %d,"
                         " number of VPs acquired %d\n", __func__, vha->host_no,
-                        MSB(rptid_entry->vp_count), LSB(rptid_entry->vp_count)));
+                        MSB(le16_to_cpu(rptid_entry->vp_count)),
+                        LSB(le16_to_cpu(rptid_entry->vp_count))));
                 DEBUG15(printk("%s primary port id %02x%02x%02x\n", __func__,
                         rptid_entry->port_id[2], rptid_entry->port_id[1],
                         rptid_entry->port_id[0]));
diff --git a/drivers/scsi/qla2xxx/qla_mid.c b/drivers/scsi/qla2xxx/qla_mid.c
index cd78c501803a..42b799abba57 100644
--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -42,7 +42,6 @@ qla24xx_allocate_vp_id(scsi_qla_host_t *vha)
 
         set_bit(vp_id, ha->vp_idx_map);
         ha->num_vhosts++;
-        ha->cur_vport_count++;
         vha->vp_idx = vp_id;
         list_add_tail(&vha->list, &ha->vp_list);
         mutex_unlock(&ha->vport_lock);
@@ -58,7 +57,6 @@ qla24xx_deallocate_vp_id(scsi_qla_host_t *vha)
         mutex_lock(&ha->vport_lock);
         vp_id = vha->vp_idx;
         ha->num_vhosts--;
-        ha->cur_vport_count--;
         clear_bit(vp_id, ha->vp_idx_map);
         list_del(&vha->list);
         mutex_unlock(&ha->vport_lock);
@@ -235,7 +233,11 @@ qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
                         atomic_set(&vha->loop_down_timer, LOOP_DOWN_TIME);
         }
 
-        /* To exclusively reset vport, we need to log it out first.*/
+        /*
+         * To exclusively reset vport, we need to log it out first.  Note: this
+         * control_vp can fail if ISP reset is already issued, this is
+         * expected, as the vp would be already logged out due to ISP reset.
+         */
         if (!test_bit(ABORT_ISP_ACTIVE, &vha->dpc_flags))
                 qla24xx_control_vp(vha, VCE_COMMAND_DISABLE_VPS_LOGO_ALL);
 
@@ -247,18 +249,11 @@ qla2x00_vp_abort_isp(scsi_qla_host_t *vha)
 static int
 qla2x00_do_dpc_vp(scsi_qla_host_t *vha)
 {
-        struct qla_hw_data *ha = vha->hw;
-        scsi_qla_host_t *base_vha = pci_get_drvdata(ha->pdev);
+        qla2x00_do_work(vha);
 
         if (test_and_clear_bit(VP_IDX_ACQUIRED, &vha->vp_flags)) {
                 /* VP acquired. complete port configuration */
-                if (atomic_read(&base_vha->loop_state) == LOOP_READY) {
-                        qla24xx_configure_vp(vha);
-                } else {
-                        set_bit(VP_IDX_ACQUIRED, &vha->vp_flags);
-                        set_bit(VP_DPC_NEEDED, &base_vha->dpc_flags);
-                }
-
+                qla24xx_configure_vp(vha);
                 return 0;
         }
 
@@ -309,6 +304,9 @@ qla2x00_do_dpc_all_vps(scsi_qla_host_t *vha)
 
         clear_bit(VP_DPC_NEEDED, &vha->dpc_flags);
 
+        if (!(ha->current_topology & ISP_CFG_F))
+                return;
+
         list_for_each_entry_safe(vp, tvp, &ha->vp_list, list) {
                 if (vp->vp_idx)
                         ret = qla2x00_do_dpc_vp(vp);
@@ -413,6 +411,11 @@ qla24xx_create_vhost(struct fc_vport *fc_vport)
 
         vha->flags.init_done = 1;
 
+        mutex_lock(&ha->vport_lock);
+        set_bit(vha->vp_idx, ha->vp_idx_map);
+        ha->cur_vport_count++;
+        mutex_unlock(&ha->vport_lock);
+
         return vha;
 
 create_vhost_failed:
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index f0396e79b6fa..b79fca7d461b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -287,9 +287,12 @@ static int qla25xx_setup_mode(struct scsi_qla_host *vha)
         int ques, req, ret;
         struct qla_hw_data *ha = vha->hw;
 
+        if (!(ha->fw_attributes & BIT_6)) {
+                qla_printk(KERN_INFO, ha,
+                        "Firmware is not multi-queue capable\n");
+                goto fail;
+        }
         if (ql2xmultique_tag) {
-                /* CPU affinity mode */
-                ha->wq = create_workqueue("qla2xxx_wq");
                 /* create a request queue for IO */
                 options |= BIT_7;
                 req = qla25xx_create_req_que(ha, options, 0, 0, -1,
@@ -299,6 +302,7 @@ static int qla25xx_setup_mode(struct scsi_qla_host *vha)
                                 "Can't create request queue\n");
                         goto fail;
                 }
+                ha->wq = create_workqueue("qla2xxx_wq");
                 vha->req = ha->req_q_map[req];
                 options |= BIT_1;
                 for (ques = 1; ques < ha->max_rsp_queues; ques++) {
@@ -309,6 +313,8 @@ static int qla25xx_setup_mode(struct scsi_qla_host *vha)
                                 goto fail2;
                         }
                 }
+                ha->flags.cpu_affinity_enabled = 1;
+
                 DEBUG2(qla_printk(KERN_INFO, ha,
                         "CPU affinity mode enabled, no. of response"
                         " queues:%d, no. of request queues:%d\n",
@@ -317,8 +323,13 @@ static int qla25xx_setup_mode(struct scsi_qla_host *vha)
         return 0;
 fail2:
         qla25xx_delete_queues(vha);
+        destroy_workqueue(ha->wq);
+        ha->wq = NULL;
 fail:
         ha->mqenable = 0;
+        kfree(ha->req_q_map);
+        kfree(ha->rsp_q_map);
+        ha->max_req_queues = ha->max_rsp_queues = 1;
         return 1;
 }
 
@@ -462,6 +473,7 @@ qla2x00_get_new_sp(scsi_qla_host_t *vha, fc_port_t *fcport,
         sp->flags = 0;
         CMD_SP(cmd) = (void *)sp;
         cmd->scsi_done = done;
+        sp->ctx = NULL;
 
         return sp;
 }
@@ -556,11 +568,8 @@ qla2x00_eh_wait_on_command(struct scsi_cmnd *cmd)
         unsigned long wait_iter = ABORT_WAIT_ITER;
         int ret = QLA_SUCCESS;
 
-        while (CMD_SP(cmd)) {
+        while (CMD_SP(cmd) && wait_iter--) {
                 msleep(ABORT_POLLING_PERIOD);
-
-                if (--wait_iter)
-                        break;
         }
         if (CMD_SP(cmd))
                 ret = QLA_FUNCTION_FAILED;
@@ -698,6 +707,8 @@ qla2x00_abort_fcport_cmds(fc_port_t *fcport)
                         continue;
                 if (sp->fcport != fcport)
                         continue;
+                if (sp->ctx)
+                        continue;
 
                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
                 if (ha->isp_ops->abort_command(sp)) {
@@ -783,7 +794,8 @@ qla2xxx_eh_abort(struct scsi_cmnd *cmd)
 
                 if (sp == NULL)
                         continue;
-
+                if (sp->ctx)
+                        continue;
                 if (sp->cmd != cmd)
                         continue;
 
@@ -848,7 +860,8 @@ qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *vha, unsigned int t,
                 sp = req->outstanding_cmds[cnt];
                 if (!sp)
                         continue;
-
+                if (sp->ctx)
+                        continue;
                 if (vha->vp_idx != sp->fcport->vha->vp_idx)
                         continue;
                 match = 0;
@@ -1106,8 +1119,7 @@ qla2x00_loop_reset(scsi_qla_host_t *vha)
         struct fc_port *fcport;
         struct qla_hw_data *ha = vha->hw;
 
-        if (ha->flags.enable_lip_full_login && !vha->vp_idx &&
-            !IS_QLA81XX(ha)) {
+        if (ha->flags.enable_lip_full_login && !IS_QLA81XX(ha)) {
                 ret = qla2x00_full_login_lip(vha);
                 if (ret != QLA_SUCCESS) {
                         DEBUG2_3(printk("%s(%ld): failed: "
@@ -1120,7 +1132,7 @@ qla2x00_loop_reset(scsi_qla_host_t *vha)
                 qla2x00_wait_for_loop_ready(vha);
         }
 
-        if (ha->flags.enable_lip_reset && !vha->vp_idx) {
+        if (ha->flags.enable_lip_reset) {
                 ret = qla2x00_lip_reset(vha);
                 if (ret != QLA_SUCCESS) {
                         DEBUG2_3(printk("%s(%ld): failed: "
@@ -1154,6 +1166,7 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
         int que, cnt;
         unsigned long flags;
         srb_t *sp;
+        struct srb_ctx *ctx;
         struct qla_hw_data *ha = vha->hw;
         struct req_que *req;
 
@@ -1166,8 +1179,14 @@ qla2x00_abort_all_cmds(scsi_qla_host_t *vha, int res)
                         sp = req->outstanding_cmds[cnt];
                         if (sp) {
                                 req->outstanding_cmds[cnt] = NULL;
-                                sp->cmd->result = res;
-                                qla2x00_sp_compl(ha, sp);
+                                if (!sp->ctx) {
+                                        sp->cmd->result = res;
+                                        qla2x00_sp_compl(ha, sp);
+                                } else {
+                                        ctx = sp->ctx;
+                                        del_timer_sync(&ctx->timer);
+                                        ctx->free(sp);
+                                }
                         }
                 }
         }
@@ -1193,6 +1212,7 @@ qla2xxx_slave_configure(struct scsi_device *sdev)
         scsi_qla_host_t *vha = shost_priv(sdev->host);
         struct qla_hw_data *ha = vha->hw;
         struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
+        fc_port_t *fcport = *(fc_port_t **)rport->dd_data;
         struct req_que *req = vha->req;
 
         if (sdev->tagged_supported)
@@ -1201,6 +1221,8 @@ qla2xxx_slave_configure(struct scsi_device *sdev)
                 scsi_deactivate_tcq(sdev, req->max_q_depth);
 
         rport->dev_loss_tmo = ha->port_down_retry_count;
+        if (sdev->type == TYPE_TAPE)
+                fcport->flags |= FCF_TAPE_PRESENT;
 
         return 0;
 }
@@ -1923,6 +1945,7 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
         if (ret)
                 goto probe_init_failed;
         /* Alloc arrays of request and response ring ptrs */
+que_init:
         if (!qla2x00_alloc_queues(ha)) {
                 qla_printk(KERN_WARNING, ha,
                 "[ERROR] Failed to allocate memory for queue"
@@ -1959,11 +1982,14 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 goto probe_failed;
         }
 
-        if (ha->mqenable)
-                if (qla25xx_setup_mode(base_vha))
+        if (ha->mqenable) {
+                if (qla25xx_setup_mode(base_vha)) {
                         qla_printk(KERN_WARNING, ha,
                                 "Can't create queues, falling back to single"
                                 " queue mode\n");
+                        goto que_init;
+                }
+        }
 
         if (ha->flags.running_gold_fw)
                 goto skip_dpc;
@@ -2155,17 +2181,19 @@ qla2x00_schedule_rport_del(struct scsi_qla_host *vha, fc_port_t *fcport,
     int defer)
 {
         struct fc_rport *rport;
+        scsi_qla_host_t *base_vha;
 
         if (!fcport->rport)
                 return;
 
         rport = fcport->rport;
         if (defer) {
+                base_vha = pci_get_drvdata(vha->hw->pdev);
                 spin_lock_irq(vha->host->host_lock);
                 fcport->drport = rport;
                 spin_unlock_irq(vha->host->host_lock);
-                set_bit(FCPORT_UPDATE_NEEDED, &vha->dpc_flags);
-                qla2xxx_wake_dpc(vha);
+                set_bit(FCPORT_UPDATE_NEEDED, &base_vha->dpc_flags);
+                qla2xxx_wake_dpc(base_vha);
         } else
                 fc_remote_port_delete(rport);
 }
@@ -2237,8 +2265,9 @@ qla2x00_mark_all_devices_lost(scsi_qla_host_t *vha, int defer)
         fc_port_t *fcport;
 
         list_for_each_entry(fcport, &vha->vp_fcports, list) {
-                if (vha->vp_idx != fcport->vp_idx)
+                if (vha->vp_idx != 0 && vha->vp_idx != fcport->vp_idx)
                         continue;
+
                 /*
                  * No point in marking the device as lost, if the device is
                  * already DEAD.
@@ -2246,10 +2275,12 @@ qla2x00_mark_all_devices_lost(scsi_qla_host_t *vha, int defer)
                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
                         continue;
                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
-                        atomic_set(&fcport->state, FCS_DEVICE_LOST);
-                        qla2x00_schedule_rport_del(vha, fcport, defer);
-                } else
-                        atomic_set(&fcport->state, FCS_DEVICE_LOST);
+                        if (defer)
+                                qla2x00_schedule_rport_del(vha, fcport, defer);
+                        else if (vha->vp_idx == fcport->vp_idx)
+                                qla2x00_schedule_rport_del(vha, fcport, defer);
+                }
+                atomic_set(&fcport->state, FCS_DEVICE_LOST);
         }
 }
 
@@ -2598,7 +2629,31 @@ qla2x00_post_idc_ack_work(struct scsi_qla_host *vha, uint16_t *mb)
         return qla2x00_post_work(vha, e);
 }
 
-static void
+#define qla2x00_post_async_work(name, type)     \
+int qla2x00_post_async_##name##_work(           \
+    struct scsi_qla_host *vha,                  \
+    fc_port_t *fcport, uint16_t *data)          \
+{                                               \
+        struct qla_work_evt *e;                 \
+                                                \
+        e = qla2x00_alloc_work(vha, type);      \
+        if (!e)                                 \
+                return QLA_FUNCTION_FAILED;     \
+                                                \
+        e->u.logio.fcport = fcport;             \
+        if (data) {                             \
+                e->u.logio.data[0] = data[0];   \
+                e->u.logio.data[1] = data[1];   \
+        }                                       \
+        return qla2x00_post_work(vha, e);       \
+}
+
+qla2x00_post_async_work(login, QLA_EVT_ASYNC_LOGIN);
+qla2x00_post_async_work(login_done, QLA_EVT_ASYNC_LOGIN_DONE);
+qla2x00_post_async_work(logout, QLA_EVT_ASYNC_LOGOUT);
+qla2x00_post_async_work(logout_done, QLA_EVT_ASYNC_LOGOUT_DONE);
+
+void
 qla2x00_do_work(struct scsi_qla_host *vha)
 {
         struct qla_work_evt *e, *tmp;
@@ -2620,6 +2675,21 @@ qla2x00_do_work(struct scsi_qla_host *vha)
                 case QLA_EVT_IDC_ACK:
                         qla81xx_idc_ack(vha, e->u.idc_ack.mb);
                         break;
+                case QLA_EVT_ASYNC_LOGIN:
+                        qla2x00_async_login(vha, e->u.logio.fcport,
+                            e->u.logio.data);
+                        break;
+                case QLA_EVT_ASYNC_LOGIN_DONE:
+                        qla2x00_async_login_done(vha, e->u.logio.fcport,
+                            e->u.logio.data);
+                        break;
+                case QLA_EVT_ASYNC_LOGOUT:
+                        qla2x00_async_logout(vha, e->u.logio.fcport);
+                        break;
+                case QLA_EVT_ASYNC_LOGOUT_DONE:
+                        qla2x00_async_logout_done(vha, e->u.logio.fcport,
+                            e->u.logio.data);
+                        break;
                 }
                 if (e->flags & QLA_EVT_FLAG_FREE)
                         kfree(e);
@@ -2635,6 +2705,7 @@ void qla2x00_relogin(struct scsi_qla_host *vha)
         int status;
         uint16_t        next_loopid = 0;
         struct qla_hw_data *ha = vha->hw;
+        uint16_t data[2];
 
         list_for_each_entry(fcport, &vha->vp_fcports, list) {
         /*
@@ -2644,6 +2715,7 @@ void qla2x00_relogin(struct scsi_qla_host *vha)
                 if (atomic_read(&fcport->state) !=
                         FCS_ONLINE && fcport->login_retry) {
 
+                        fcport->login_retry--;
                         if (fcport->flags & FCF_FABRIC_DEVICE) {
                                 if (fcport->flags & FCF_TAPE_PRESENT)
                                         ha->isp_ops->fabric_logout(vha,
@@ -2652,13 +2724,22 @@ void qla2x00_relogin(struct scsi_qla_host *vha)
                                                         fcport->d_id.b.area,
                                                         fcport->d_id.b.al_pa);
 
-                                status = qla2x00_fabric_login(vha, fcport,
-                                                        &next_loopid);
+                                if (IS_ALOGIO_CAPABLE(ha)) {
+                                        data[0] = 0;
+                                        data[1] = QLA_LOGIO_LOGIN_RETRIED;
+                                        status = qla2x00_post_async_login_work(
+                                            vha, fcport, data);
+                                        if (status == QLA_SUCCESS)
+                                                continue;
+                                        /* Attempt a retry. */
+                                        status = 1;
+                                } else
+                                        status = qla2x00_fabric_login(vha,
+                                            fcport, &next_loopid);
                         } else
                                 status = qla2x00_local_device_login(vha,
                                                                 fcport);
 
-                        fcport->login_retry--;
                         if (status == QLA_SUCCESS) {
                                 fcport->old_loop_id = fcport->loop_id;
 
@@ -2831,6 +2912,9 @@ qla2x00_do_dpc(void *data)
          */
         ha->dpc_active = 0;
 
+        /* Cleanup any residual CTX SRBs. */
+        qla2x00_abort_all_cmds(base_vha, DID_NO_CONNECT << 16);
+
         return 0;
 }
 
@@ -2971,6 +3055,8 @@ qla2x00_timer(scsi_qla_host_t *vha)
                                         sp = req->outstanding_cmds[index];
                                         if (!sp)
                                                 continue;
+                                        if (sp->ctx)
+                                                continue;
                                         sfcp = sp->fcport;
                                         if (!(sfcp->flags & FCF_TAPE_PRESENT))
                                                 continue;
@@ -2987,8 +3073,7 @@ qla2x00_timer(scsi_qla_host_t *vha)
 
                 /* if the loop has been down for 4 minutes, reinit adapter */
                 if (atomic_dec_and_test(&vha->loop_down_timer) != 0) {
-                        if (!(vha->device_flags & DFLG_NO_CABLE) &&
-                            !vha->vp_idx) {
+                        if (!(vha->device_flags & DFLG_NO_CABLE)) {
                                 DEBUG(printk("scsi(%ld): Loop down - "
                                     "aborting ISP.\n",
                                     vha->host_no));
diff --git a/drivers/scsi/qla2xxx/qla_version.h b/drivers/scsi/qla2xxx/qla_version.h
index 84369705a9ad..ac107a2c34a4 100644
--- a/drivers/scsi/qla2xxx/qla_version.h
+++ b/drivers/scsi/qla2xxx/qla_version.h
@@ -7,7 +7,7 @@
 /*
  * Driver version
  */
-#define QLA2XXX_VERSION      "8.03.01-k4"
+#define QLA2XXX_VERSION      "8.03.01-k6"
 
 #define QLA_DRIVER_MAJOR_VER    8
 #define QLA_DRIVER_MINOR_VER    3
diff --git a/drivers/scsi/qla4xxx/ql4_isr.c b/drivers/scsi/qla4xxx/ql4_isr.c
index 8025ee16588e..c196d55eae39 100644
--- a/drivers/scsi/qla4xxx/ql4_isr.c
+++ b/drivers/scsi/qla4xxx/ql4_isr.c
@@ -227,11 +227,11 @@ static void qla4xxx_status_entry(struct scsi_qla_host *ha,
         case SCS_DATA_UNDERRUN:
         case SCS_DATA_OVERRUN:
                 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
-                        (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
-                        DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun, "
-                                      "residual = 0x%x\n", ha->host_no,
+                     (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
+                        DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
+                                      ha->host_no,
                                       cmd->device->channel, cmd->device->id,
-                                      cmd->device->lun, __func__, residual));
+                                      cmd->device->lun, __func__));
 
                         cmd->result = DID_ERROR << 16;
                         break;
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 2de5f3ad640b..b6e03074cb8f 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -994,7 +994,7 @@ static int scsi_vpd_inquiry(struct scsi_device *sdev, unsigned char *buffer,
          * all the existing users tried this hard.
          */
         result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer,
-                                  len + 4, NULL, 30 * HZ, 3, NULL);
+                                  len, NULL, 30 * HZ, 3, NULL);
         if (result)
                 return result;
 
@@ -1021,13 +1021,14 @@ unsigned char *scsi_get_vpd_page(struct scsi_device *sdev, u8 page)
 {
         int i, result;
         unsigned int len;
-        unsigned char *buf = kmalloc(259, GFP_KERNEL);
+        const unsigned int init_vpd_len = 255;
+        unsigned char *buf = kmalloc(init_vpd_len, GFP_KERNEL);
 
         if (!buf)
                 return NULL;
 
         /* Ask for all the pages supported by this device */
-        result = scsi_vpd_inquiry(sdev, buf, 0, 255);
+        result = scsi_vpd_inquiry(sdev, buf, 0, init_vpd_len);
         if (result)
                 goto fail;
 
@@ -1050,12 +1051,12 @@ unsigned char *scsi_get_vpd_page(struct scsi_device *sdev, u8 page)
          * Some pages are longer than 255 bytes.  The actual length of
          * the page is returned in the header.
          */
-        len = (buf[2] << 8) | buf[3];
-        if (len <= 255)
+        len = ((buf[2] << 8) | buf[3]) + 4;
+        if (len <= init_vpd_len)
                 return buf;
 
         kfree(buf);
-        buf = kmalloc(len + 4, GFP_KERNEL);
+        buf = kmalloc(len, GFP_KERNEL);
         result = scsi_vpd_inquiry(sdev, buf, page, len);
         if (result)
                 goto fail;
diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index a1689353d7fd..877204daf549 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -382,9 +382,13 @@ static int scsi_eh_completed_normally(struct scsi_cmnd *scmd)
                  * who knows?  FIXME(eric)
                  */
                 return SUCCESS;
+        case RESERVATION_CONFLICT:
+                /*
+                 * let issuer deal with this, it could be just fine
+                 */
+                return SUCCESS;
         case BUSY:
         case QUEUE_FULL:
-        case RESERVATION_CONFLICT:
         default:
                 return FAILED;
         }
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 90c94da8baa4..5987da857103 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -896,6 +896,7 @@ void scsi_io_completion(struct scsi_cmnd *cmd, unsigned int good_bytes)
                         scsi_print_result(cmd);
                         if (driver_byte(result) & DRIVER_SENSE)
                                 scsi_print_sense("", cmd);
+                        scsi_print_command(cmd);
                 }
                 if (blk_end_request_err(req, -EIO))
                         scsi_requeue_command(q, cmd);
diff --git a/drivers/scsi/scsi_transport_fc.c b/drivers/scsi/scsi_transport_fc.c
index 292c02f810d0..b98885de6876 100644
--- a/drivers/scsi/scsi_transport_fc.c
+++ b/drivers/scsi/scsi_transport_fc.c
@@ -291,7 +291,7 @@ static void fc_scsi_scan_rport(struct work_struct *work);
 #define FC_STARGET_NUM_ATTRS    3
 #define FC_RPORT_NUM_ATTRS      10
 #define FC_VPORT_NUM_ATTRS      9
-#define FC_HOST_NUM_ATTRS       21
+#define FC_HOST_NUM_ATTRS       22
 
 struct fc_internal {
         struct scsi_transport_template t;
@@ -3432,7 +3432,7 @@ fc_bsg_jobdone(struct fc_bsg_job *job)
 
 /**
  * fc_bsg_softirq_done - softirq done routine for destroying the bsg requests
- * @req:        BSG request that holds the job to be destroyed
+ * @rq:        BSG request that holds the job to be destroyed
  */
 static void fc_bsg_softirq_done(struct request *rq)
 {
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index b47240ca4b19..ad897df36615 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -36,6 +36,38 @@
 
 #define ISCSI_TRANSPORT_VERSION "2.0-870"
 
+static int dbg_session;
+module_param_named(debug_session, dbg_session, int,
+                   S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_session,
+                 "Turn on debugging for sessions in scsi_transport_iscsi "
+                 "module. Set to 1 to turn on, and zero to turn off. Default "
+                 "is off.");
+
+static int dbg_conn;
+module_param_named(debug_conn, dbg_conn, int,
+                   S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug_conn,
+                 "Turn on debugging for connections in scsi_transport_iscsi "
+                 "module. Set to 1 to turn on, and zero to turn off. Default "
+                 "is off.");
+
+#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...)              \
+        do {                                                            \
+                if (dbg_session)                                        \
+                        iscsi_cls_session_printk(KERN_INFO, _session,   \
+                                                 "%s: " dbg_fmt,        \
+                                                 __func__, ##arg);      \
+        } while (0);
+
+#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...)                    \
+        do {                                                            \
+                if (dbg_conn)                                           \
+                        iscsi_cls_conn_printk(KERN_INFO, _conn,         \
+                                              "%s: " dbg_fmt,           \
+                                              __func__, ##arg); \
+        } while (0);
+
 struct iscsi_internal {
         struct scsi_transport_template t;
         struct iscsi_transport *iscsi_transport;
@@ -377,6 +409,7 @@ static void iscsi_session_release(struct device *dev)
 
         shost = iscsi_session_to_shost(session);
         scsi_host_put(shost);
+        ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
         kfree(session);
 }
 
@@ -441,6 +474,9 @@ static int iscsi_user_scan_session(struct device *dev, void *data)
                 return 0;
 
         session = iscsi_dev_to_session(dev);
+
+        ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
+
         shost = iscsi_session_to_shost(session);
         ihost = shost->shost_data;
 
@@ -448,8 +484,7 @@ static int iscsi_user_scan_session(struct device *dev, void *data)
         spin_lock_irqsave(&session->lock, flags);
         if (session->state != ISCSI_SESSION_LOGGED_IN) {
                 spin_unlock_irqrestore(&session->lock, flags);
-                mutex_unlock(&ihost->mutex);
-                return 0;
+                goto user_scan_exit;
         }
         id = session->target_id;
         spin_unlock_irqrestore(&session->lock, flags);
@@ -462,7 +497,10 @@ static int iscsi_user_scan_session(struct device *dev, void *data)
                         scsi_scan_target(&session->dev, 0, id,
                                          scan_data->lun, 1);
         }
+
+user_scan_exit:
         mutex_unlock(&ihost->mutex);
+        ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
         return 0;
 }
 
@@ -522,7 +560,9 @@ static void session_recovery_timedout(struct work_struct *work)
         if (session->transport->session_recovery_timedout)
                 session->transport->session_recovery_timedout(session);
 
+        ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
         scsi_target_unblock(&session->dev);
+        ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
 }
 
 static void __iscsi_unblock_session(struct work_struct *work)
@@ -534,6 +574,7 @@ static void __iscsi_unblock_session(struct work_struct *work)
         struct iscsi_cls_host *ihost = shost->shost_data;
         unsigned long flags;
 
+        ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
         /*
          * The recovery and unblock work get run from the same workqueue,
          * so try to cancel it if it was going to run after this unblock.
@@ -553,6 +594,7 @@ static void __iscsi_unblock_session(struct work_struct *work)
                 if (scsi_queue_work(shost, &session->scan_work))
                         atomic_inc(&ihost->nr_scans);
         }
+        ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
 }
 
 /**
@@ -579,10 +621,12 @@ static void __iscsi_block_session(struct work_struct *work)
                                      block_work);
         unsigned long flags;
 
+        ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
         spin_lock_irqsave(&session->lock, flags);
         session->state = ISCSI_SESSION_FAILED;
         spin_unlock_irqrestore(&session->lock, flags);
         scsi_target_block(&session->dev);
+        ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
         queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work,
                            session->recovery_tmo * HZ);
 }
@@ -602,6 +646,8 @@ static void __iscsi_unbind_session(struct work_struct *work)
         struct iscsi_cls_host *ihost = shost->shost_data;
         unsigned long flags;
 
+        ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
+
         /* Prevent new scans and make sure scanning is not in progress */
         mutex_lock(&ihost->mutex);
         spin_lock_irqsave(&session->lock, flags);
@@ -616,6 +662,7 @@ static void __iscsi_unbind_session(struct work_struct *work)
 
         scsi_remove_target(&session->dev);
         iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
+        ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
 }
 
 struct iscsi_cls_session *
@@ -647,6 +694,8 @@ iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
         device_initialize(&session->dev);
         if (dd_size)
                 session->dd_data = &session[1];
+
+        ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
         return session;
 }
 EXPORT_SYMBOL_GPL(iscsi_alloc_session);
@@ -712,6 +761,7 @@ int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
         spin_unlock_irqrestore(&sesslock, flags);
 
         iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
+        ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
         return 0;
 
 release_host:
@@ -752,6 +802,7 @@ static void iscsi_conn_release(struct device *dev)
         struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
         struct device *parent = conn->dev.parent;
 
+        ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
         kfree(conn);
         put_device(parent);
 }
@@ -774,6 +825,8 @@ void iscsi_remove_session(struct iscsi_cls_session *session)
         unsigned long flags;
         int err;
 
+        ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
+
         spin_lock_irqsave(&sesslock, flags);
         list_del(&session->sess_list);
         spin_unlock_irqrestore(&sesslock, flags);
@@ -807,12 +860,15 @@ void iscsi_remove_session(struct iscsi_cls_session *session)
                                          "for session. Error %d.\n", err);
 
         transport_unregister_device(&session->dev);
+
+        ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
         device_del(&session->dev);
 }
 EXPORT_SYMBOL_GPL(iscsi_remove_session);
 
 void iscsi_free_session(struct iscsi_cls_session *session)
 {
+        ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
         iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
         put_device(&session->dev);
 }
@@ -828,6 +884,7 @@ EXPORT_SYMBOL_GPL(iscsi_free_session);
 int iscsi_destroy_session(struct iscsi_cls_session *session)
 {
         iscsi_remove_session(session);
+        ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
         iscsi_free_session(session);
         return 0;
 }
@@ -885,6 +942,8 @@ iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
         list_add(&conn->conn_list, &connlist);
         conn->active = 1;
         spin_unlock_irqrestore(&connlock, flags);
+
+        ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
         return conn;
 
 release_parent_ref:
@@ -912,6 +971,7 @@ int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
         spin_unlock_irqrestore(&connlock, flags);
 
         transport_unregister_device(&conn->dev);
+        ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
         device_unregister(&conn->dev);
         return 0;
 }
@@ -1200,6 +1260,9 @@ int iscsi_session_event(struct iscsi_cls_session *session,
                                          "Cannot notify userspace of session "
                                          "event %u. Check iscsi daemon\n",
                                          event);
+
+        ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
+                                event, rc);
         return rc;
 }
 EXPORT_SYMBOL_GPL(iscsi_session_event);
@@ -1221,6 +1284,8 @@ iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
         shost = iscsi_session_to_shost(session);
         ev->r.c_session_ret.host_no = shost->host_no;
         ev->r.c_session_ret.sid = session->sid;
+        ISCSI_DBG_TRANS_SESSION(session,
+                                "Completed creating transport session\n");
         return 0;
 }
 
@@ -1246,6 +1311,8 @@ iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
 
         ev->r.c_conn_ret.sid = session->sid;
         ev->r.c_conn_ret.cid = conn->cid;
+
+        ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
         return 0;
 }
 
@@ -1258,8 +1325,10 @@ iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev
         if (!conn)
                 return -EINVAL;
 
+        ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
         if (transport->destroy_conn)
                 transport->destroy_conn(conn);
+
         return 0;
 }
 
diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index 0895d3c71b03..fd47cb1bee1b 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -1692,10 +1692,6 @@ sas_attach_transport(struct sas_function_template *ft)
         i->f = ft;
 
         count = 0;
-        SETUP_PORT_ATTRIBUTE(num_phys);
-        i->host_attrs[count] = NULL;
-
-        count = 0;
         SETUP_PHY_ATTRIBUTE(initiator_port_protocols);
         SETUP_PHY_ATTRIBUTE(target_port_protocols);
         SETUP_PHY_ATTRIBUTE(device_type);
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index b7b9fec67a98..a89c421dab51 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2021,6 +2021,7 @@ static void sd_probe_async(void *data, async_cookie_t cookie)
 
         sd_printk(KERN_NOTICE, sdkp, "Attached SCSI %sdisk\n",
                   sdp->removable ? "removable " : "");
+        put_device(&sdkp->dev);
 }
 
 /**
@@ -2106,6 +2107,7 @@ static int sd_probe(struct device *dev)
 
         get_device(&sdp->sdev_gendev);
 
+        get_device(&sdkp->dev); /* prevent release before async_schedule */
         async_schedule(sd_probe_async, sdkp);
 
         return 0;
diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c
index 4f618f487356..55b034b72708 100644
--- a/drivers/scsi/ses.c
+++ b/drivers/scsi/ses.c
@@ -347,6 +347,97 @@ static int ses_enclosure_find_by_addr(struct enclosure_device *edev,
         return 0;
 }
 
+#define INIT_ALLOC_SIZE 32
+
+static void ses_enclosure_data_process(struct enclosure_device *edev,
+                                       struct scsi_device *sdev,
+                                       int create)
+{
+        u32 result;
+        unsigned char *buf = NULL, *type_ptr, *desc_ptr, *addl_desc_ptr = NULL;
+        int i, j, page7_len, len, components;
+        struct ses_device *ses_dev = edev->scratch;
+        int types = ses_dev->page1[10];
+        unsigned char *hdr_buf = kzalloc(INIT_ALLOC_SIZE, GFP_KERNEL);
+
+        if (!hdr_buf)
+                goto simple_populate;
+
+        /* re-read page 10 */
+        if (ses_dev->page10)
+                ses_recv_diag(sdev, 10, ses_dev->page10, ses_dev->page10_len);
+        /* Page 7 for the descriptors is optional */
+        result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
+        if (result)
+                goto simple_populate;
+
+        page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
+        /* add 1 for trailing '\0' we'll use */
+        buf = kzalloc(len + 1, GFP_KERNEL);
+        if (!buf)
+                goto simple_populate;
+        result = ses_recv_diag(sdev, 7, buf, len);
+        if (result) {
+ simple_populate:
+                kfree(buf);
+                buf = NULL;
+                desc_ptr = NULL;
+                len = 0;
+                page7_len = 0;
+        } else {
+                desc_ptr = buf + 8;
+                len = (desc_ptr[2] << 8) + desc_ptr[3];
+                /* skip past overall descriptor */
+                desc_ptr += len + 4;
+                if (ses_dev->page10)
+                        addl_desc_ptr = ses_dev->page10 + 8;
+        }
+        type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
+        components = 0;
+        for (i = 0; i < types; i++, type_ptr += 4) {
+                for (j = 0; j < type_ptr[1]; j++) {
+                        char *name = NULL;
+                        struct enclosure_component *ecomp;
+
+                        if (desc_ptr) {
+                                if (desc_ptr >= buf + page7_len) {
+                                        desc_ptr = NULL;
+                                } else {
+                                        len = (desc_ptr[2] << 8) + desc_ptr[3];
+                                        desc_ptr += 4;
+                                        /* Add trailing zero - pushes into
+                                         * reserved space */
+                                        desc_ptr[len] = '\0';
+                                        name = desc_ptr;
+                                }
+                        }
+                        if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
+                            type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
+
+                                if (create)
+                                        ecomp = enclosure_component_register(edev,
+                                                                             components++,
+                                                                             type_ptr[0],
+                                                                             name);
+                                else
+                                        ecomp = &edev->component[components++];
+
+                                if (!IS_ERR(ecomp) && addl_desc_ptr)
+                                        ses_process_descriptor(ecomp,
+                                                               addl_desc_ptr);
+                        }
+                        if (desc_ptr)
+                                desc_ptr += len;
+
+                        if (addl_desc_ptr)
+                                addl_desc_ptr += addl_desc_ptr[1] + 2;
+
+                }
+        }
+        kfree(buf);
+        kfree(hdr_buf);
+}
+
 static void ses_match_to_enclosure(struct enclosure_device *edev,
                                    struct scsi_device *sdev)
 {
@@ -361,6 +452,8 @@ static void ses_match_to_enclosure(struct enclosure_device *edev,
         if (!buf)
                 return;
 
+        ses_enclosure_data_process(edev, to_scsi_device(edev->edev.parent), 0);
+
         vpd_len = ((buf[2] << 8) | buf[3]) + 4;
 
         desc = buf + 4;
@@ -395,28 +488,26 @@ static void ses_match_to_enclosure(struct enclosure_device *edev,
         kfree(buf);
 }
 
-#define INIT_ALLOC_SIZE 32
-
 static int ses_intf_add(struct device *cdev,
                         struct class_interface *intf)
 {
         struct scsi_device *sdev = to_scsi_device(cdev->parent);
         struct scsi_device *tmp_sdev;
-        unsigned char *buf = NULL, *hdr_buf, *type_ptr, *desc_ptr = NULL,
-                *addl_desc_ptr = NULL;
+        unsigned char *buf = NULL, *hdr_buf, *type_ptr;
         struct ses_device *ses_dev;
         u32 result;
-        int i, j, types, len, page7_len = 0, components = 0;
+        int i, types, len, components = 0;
         int err = -ENOMEM;
         struct enclosure_device *edev;
         struct ses_component *scomp = NULL;
 
         if (!scsi_device_enclosure(sdev)) {
                 /* not an enclosure, but might be in one */
-                edev = enclosure_find(&sdev->host->shost_gendev);
-                if (edev) {
+                struct enclosure_device *prev = NULL;
+
+                while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
                         ses_match_to_enclosure(edev, sdev);
-                        put_device(&edev->edev);
+                        prev = edev;
                 }
                 return -ENODEV;
         }
@@ -500,6 +591,7 @@ static int ses_intf_add(struct device *cdev,
                 ses_dev->page10_len = len;
                 buf = NULL;
         }
+        kfree(hdr_buf);
 
         scomp = kzalloc(sizeof(struct ses_component) * components, GFP_KERNEL);
         if (!scomp)
@@ -516,72 +608,7 @@ static int ses_intf_add(struct device *cdev,
         for (i = 0; i < components; i++)
                 edev->component[i].scratch = scomp + i;
 
-        /* Page 7 for the descriptors is optional */
-        result = ses_recv_diag(sdev, 7, hdr_buf, INIT_ALLOC_SIZE);
-        if (result)
-                goto simple_populate;
-
-        page7_len = len = (hdr_buf[2] << 8) + hdr_buf[3] + 4;
-        /* add 1 for trailing '\0' we'll use */
-        buf = kzalloc(len + 1, GFP_KERNEL);
-        if (!buf)
-                goto simple_populate;
-        result = ses_recv_diag(sdev, 7, buf, len);
-        if (result) {
- simple_populate:
-                kfree(buf);
-                buf = NULL;
-                desc_ptr = NULL;
-                addl_desc_ptr = NULL;
-        } else {
-                desc_ptr = buf + 8;
-                len = (desc_ptr[2] << 8) + desc_ptr[3];
-                /* skip past overall descriptor */
-                desc_ptr += len + 4;
-                if (ses_dev->page10)
-                        addl_desc_ptr = ses_dev->page10 + 8;
-        }
-        type_ptr = ses_dev->page1 + 12 + ses_dev->page1[11];
-        components = 0;
-        for (i = 0; i < types; i++, type_ptr += 4) {
-                for (j = 0; j < type_ptr[1]; j++) {
-                        char *name = NULL;
-                        struct enclosure_component *ecomp;
-
-                        if (desc_ptr) {
-                                if (desc_ptr >= buf + page7_len) {
-                                        desc_ptr = NULL;
-                                } else {
-                                        len = (desc_ptr[2] << 8) + desc_ptr[3];
-                                        desc_ptr += 4;
-                                        /* Add trailing zero - pushes into
-                                         * reserved space */
-                                        desc_ptr[len] = '\0';
-                                        name = desc_ptr;
-                                }
-                        }
-                        if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE ||
-                            type_ptr[0] == ENCLOSURE_COMPONENT_ARRAY_DEVICE) {
-
-                                ecomp = enclosure_component_register(edev,
-                                                             components++,
-                                                             type_ptr[0],
-                                                             name);
-
-                                if (!IS_ERR(ecomp) && addl_desc_ptr)
-                                        ses_process_descriptor(ecomp,
-                                                               addl_desc_ptr);
-                        }
-                        if (desc_ptr)
-                                desc_ptr += len;
-
-                        if (addl_desc_ptr)
-                                addl_desc_ptr += addl_desc_ptr[1] + 2;
-
-                }
-        }
-        kfree(buf);
-        kfree(hdr_buf);
+        ses_enclosure_data_process(edev, sdev, 1);
 
         /* see if there are any devices matching before
          * we found the enclosure */
@@ -615,17 +642,26 @@ static int ses_remove(struct device *dev)
         return 0;
 }
 
-static void ses_intf_remove(struct device *cdev,
-                            struct class_interface *intf)
+static void ses_intf_remove_component(struct scsi_device *sdev)
+{
+        struct enclosure_device *edev, *prev = NULL;
+
+        while ((edev = enclosure_find(&sdev->host->shost_gendev, prev)) != NULL) {
+                prev = edev;
+                if (!enclosure_remove_device(edev, &sdev->sdev_gendev))
+                        break;
+        }
+        if (edev)
+                put_device(&edev->edev);
+}
+
+static void ses_intf_remove_enclosure(struct scsi_device *sdev)
 {
-        struct scsi_device *sdev = to_scsi_device(cdev->parent);
         struct enclosure_device *edev;
         struct ses_device *ses_dev;
 
-        if (!scsi_device_enclosure(sdev))
-                return;
-
-        edev = enclosure_find(cdev->parent);
+        /*  exact match to this enclosure */
+        edev = enclosure_find(&sdev->sdev_gendev, NULL);
         if (!edev)
                 return;
 
@@ -643,6 +679,17 @@ static void ses_intf_remove(struct device *cdev,
         enclosure_unregister(edev);
 }
 
+static void ses_intf_remove(struct device *cdev,
+                            struct class_interface *intf)
+{
+        struct scsi_device *sdev = to_scsi_device(cdev->parent);
+
+        if (!scsi_device_enclosure(sdev))
+                ses_intf_remove_component(sdev);
+        else
+                ses_intf_remove_enclosure(sdev);
+}
+
 static struct class_interface ses_interface = {
         .add_dev        = ses_intf_add,
         .remove_dev     = ses_intf_remove,
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 9230402c45af..4968c4ced385 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -1811,7 +1811,7 @@ retry:
         return 0;
 out:
         for (i = 0; i < k; i++)
-                __free_pages(schp->pages[k], order);
+                __free_pages(schp->pages[i], order);
 
         if (--order >= 0)
                 goto retry;
diff --git a/drivers/scsi/stex.c b/drivers/scsi/stex.c
index 8d2a95c4e5b5..09fa8861fc58 100644
--- a/drivers/scsi/stex.c
+++ b/drivers/scsi/stex.c
@@ -55,6 +55,7 @@ enum {
         OIS     = 0x30, /* MU_OUTBOUND_INTERRUPT_STATUS */
         OIM     = 0x3c, /* MU_OUTBOUND_INTERRUPT_MASK */
 
+        YIOA_STATUS                             = 0x00,
         YH2I_INT                                = 0x20,
         YINT_EN                                 = 0x34,
         YI2H_INT                                = 0x9c,
@@ -108,6 +109,10 @@ enum {
 
         SS_HEAD_HANDSHAKE                       = 0x80,
 
+        SS_H2I_INT_RESET                        = 0x100,
+
+        SS_MU_OPERATIONAL                       = 0x80000000,
+
         STEX_CDB_LENGTH                         = 16,
         STATUS_VAR_LEN                          = 128,
 
@@ -884,7 +889,7 @@ static void stex_ss_mu_intr(struct st_hba *hba)
                 tag = (u16)value;
                 if (unlikely(tag >= hba->host->can_queue)) {
                         printk(KERN_WARNING DRV_NAME
-                                        "(%s): invalid tag\n", pci_name(hba->pdev));
+                                "(%s): invalid tag\n", pci_name(hba->pdev));
                         continue;
                 }
 
@@ -1040,16 +1045,27 @@ static int stex_ss_handshake(struct st_hba *hba)
         void __iomem *base = hba->mmio_base;
         struct st_msg_header *msg_h;
         struct handshake_frame *h;
-        __le32 *scratch = hba->scratch;
+        __le32 *scratch;
         u32 data;
         unsigned long before;
         int ret = 0;
 
-        h = (struct handshake_frame *)(hba->alloc_rq(hba));
-        msg_h = (struct st_msg_header *)h - 1;
+        before = jiffies;
+        while ((readl(base + YIOA_STATUS) & SS_MU_OPERATIONAL) == 0) {
+                if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
+                        printk(KERN_ERR DRV_NAME
+                                "(%s): firmware not operational\n",
+                                pci_name(hba->pdev));
+                        return -1;
+                }
+                msleep(1);
+        }
+
+        msg_h = (struct st_msg_header *)hba->dma_mem;
         msg_h->handle = cpu_to_le64(hba->dma_handle);
         msg_h->flag = SS_HEAD_HANDSHAKE;
 
+        h = (struct handshake_frame *)(msg_h + 1);
         h->rb_phy = cpu_to_le64(hba->dma_handle);
         h->req_sz = cpu_to_le16(hba->rq_size);
         h->req_cnt = cpu_to_le16(hba->rq_count+1);
@@ -1205,6 +1221,13 @@ static void stex_hard_reset(struct st_hba *hba)
                         hba->pdev->saved_config_space[i]);
 }
 
+static void stex_ss_reset(struct st_hba *hba)
+{
+        writel(SS_H2I_INT_RESET, hba->mmio_base + YH2I_INT);
+        readl(hba->mmio_base + YH2I_INT);
+        ssleep(5);
+}
+
 static int stex_reset(struct scsi_cmnd *cmd)
 {
         struct st_hba *hba;
@@ -1221,6 +1244,8 @@ static int stex_reset(struct scsi_cmnd *cmd)
 
         if (hba->cardtype == st_shasta)
                 stex_hard_reset(hba);
+        else if (hba->cardtype == st_yel)
+                stex_ss_reset(hba);
 
         if (hba->cardtype != st_yosemite) {
                 if (stex_handshake(hba)) {