[PATCH] qla4xxx: bug fix: driver hardware semaphore needs to be grabbed before soft reset

On qla4xxx, the driver needs to grab the drvr semaphore provided by
the hardware, prior to issuing a reset. This patches takes care of a
couple of places where it was not being done. In addition there is
minor clean up.

Signed-off-by: David Somayajulu <david.somayajulu@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

4 files changed, 15 insertions, 37 deletions

diff --git a/drivers/scsi/qla4xxx/ql4_glbl.h b/drivers/scsi/qla4xxx/ql4_glbl.h
index 1b221ff0f6f7..eeefdcb1edb5 100644
--- a/drivers/scsi/qla4xxx/ql4_glbl.h
+++ b/drivers/scsi/qla4xxx/ql4_glbl.h
@@ -8,6 +8,7 @@
 #ifndef __QLA4x_GBL_H
 #define __QLA4x_GBL_H
 
+int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a);
 int qla4xxx_send_tgts(struct scsi_qla_host *ha, char *ip, uint16_t port);
 int qla4xxx_send_command_to_isp(struct scsi_qla_host *ha, struct srb * srb);
 int qla4xxx_initialize_adapter(struct scsi_qla_host * ha,
diff --git a/drivers/scsi/qla4xxx/ql4_init.c b/drivers/scsi/qla4xxx/ql4_init.c
index bb3a1c11f44c..9e81b810dc88 100644
--- a/drivers/scsi/qla4xxx/ql4_init.c
+++ b/drivers/scsi/qla4xxx/ql4_init.c
@@ -978,7 +978,7 @@ static int qla4xxx_start_firmware_from_flash(struct scsi_qla_host *ha)
         return status;
 }
 
-static int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
+int ql4xxx_lock_drvr_wait(struct scsi_qla_host *a)
 {
 #define QL4_LOCK_DRVR_WAIT      300
 #define QL4_LOCK_DRVR_SLEEP     100
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 5b8db6109536..bab434ee774b 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -919,18 +919,11 @@ static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
         if (status == QLA_SUCCESS) {
                 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
                               ha->host_no, __func__));
-                status = qla4xxx_soft_reset(ha);
-        }
-        /* FIXMEkaren: Do we want to keep interrupts enabled and process
-           AENs after soft reset */
-
-        /* If firmware (SOFT) reset failed, or if all outstanding
-         * commands have not returned, then do a HARD reset.
-         */
-        if (status == QLA_ERROR) {
-                DEBUG2(printk("scsi%ld: %s - Performing hard reset..\n",
-                              ha->host_no, __func__));
-                status = qla4xxx_hard_reset(ha);
+                qla4xxx_flush_active_srbs(ha);
+                if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
+                        status = qla4xxx_soft_reset(ha);
+                else
+                        status = QLA_ERROR;
         }
 
         /* Flush any pending ddb changed AENs */
@@ -1016,13 +1009,9 @@ static void qla4xxx_do_dpc(void *data)
         struct scsi_qla_host *ha = (struct scsi_qla_host *) data;
         struct ddb_entry *ddb_entry, *dtemp;
 
-        DEBUG2(printk("scsi%ld: %s: DPC handler waking up.\n",
-                      ha->host_no, __func__));
-
-        DEBUG2(printk("scsi%ld: %s: ha->flags = 0x%08lx\n",
-                      ha->host_no, __func__, ha->flags));
-        DEBUG2(printk("scsi%ld: %s: ha->dpc_flags = 0x%08lx\n",
-                      ha->host_no, __func__, ha->dpc_flags));
+        DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
+                "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
+                ha->host_no, __func__, ha->flags, ha->dpc_flags));
 
         /* Initialization not yet finished. Don't do anything yet. */
         if (!test_bit(AF_INIT_DONE, &ha->flags))
@@ -1032,16 +1021,8 @@ static void qla4xxx_do_dpc(void *data)
             test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
             test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
             test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
-                if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags))
-                        /*
-                         * dg 09/23 Never initialize ddb list
-                         * once we up and running
-                         * qla4xxx_recover_adapter(ha,
-                         *    REBUILD_DDB_LIST);
-                         */
-                        qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
-
-                if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
+                if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
+                        test_bit(DPC_RESET_HA, &ha->dpc_flags))
                         qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
 
                 if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
@@ -1122,7 +1103,8 @@ static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
                 destroy_workqueue(ha->dpc_thread);
 
         /* Issue Soft Reset to put firmware in unknown state */
-        qla4xxx_soft_reset(ha);
+        if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
+                qla4xxx_soft_reset(ha);
 
         /* Remove timer thread, if present */
         if (ha->timer_active)
diff --git a/drivers/scsi/qla4xxx/ql4_version.h b/drivers/scsi/qla4xxx/ql4_version.h
index b3fe7e68988e..d05048b4e88a 100644
--- a/drivers/scsi/qla4xxx/ql4_version.h
+++ b/drivers/scsi/qla4xxx/ql4_version.h
@@ -5,9 +5,4 @@
  * See LICENSE.qla4xxx for copyright and licensing details.
  */
 
-#define QLA4XXX_DRIVER_VERSION  "5.00.05b9-k"
-
-#define QL4_DRIVER_MAJOR_VER    5
-#define QL4_DRIVER_MINOR_VER    0
-#define QL4_DRIVER_PATCH_VER    5
-#define QL4_DRIVER_BETA_VER     9
+#define QLA4XXX_DRIVER_VERSION  "5.00.06-k"