[SCSI] mpt2sas: cleanup interrupt routine and config_request optimization

Cleaned up base_interrupt routine to be more effiecent.

Deleted about a third of the config page API by moving redundant code from all
the calling functions to _config_request.

Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: Eric Moore <Eric.moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

4 files changed, 234 insertions, 753 deletions

diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.c b/drivers/scsi/mpt2sas/mpt2sas_base.c
index 2e4bc3d2b435..d95d2f274cb3 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.c
@@ -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;
 }
 
@@ -1650,7 +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);
 }
 
 /**
@@ -3306,13 +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);
@@ -3436,6 +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;
diff --git a/drivers/scsi/mpt2sas/mpt2sas_base.h b/drivers/scsi/mpt2sas/mpt2sas_base.h
index ff05ae1e43ba..f4bf7ff8f480 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_base.h
+++ b/drivers/scsi/mpt2sas/mpt2sas_base.h
@@ -785,7 +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
diff --git a/drivers/scsi/mpt2sas/mpt2sas_config.c b/drivers/scsi/mpt2sas/mpt2sas_config.c
index b9f4d0f97e50..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);
@@ -326,45 +423,6 @@ out:
 }
 
 /**
- * _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;
-
-        mem->config_page = pci_alloc_consistent(ioc->pdev, mem->config_page_sz,
-            &mem->config_page_dma);
-        if (!mem->config_page)
-                r = -ENOMEM;
-        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)
-{
-        pci_free_consistent(ioc->pdev, mem->config_page_sz, mem->config_page,
-            mem->config_page_dma);
-}
-
-/**
  * mpt2sas_config_get_manufacturing_pg0 - obtain manufacturing page 0
  * @ioc: per adapter object
  * @mpi_reply: reply mf payload returned from firmware
@@ -379,9 +437,7 @@ mpt2sas_config_get_manufacturing_pg0(struct MPT2SAS_ADAPTER *ioc,
 {
         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;
@@ -390,37 +446,14 @@ mpt2sas_config_get_manufacturing_pg0(struct MPT2SAS_ADAPTER *ioc,
         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 +473,7 @@ mpt2sas_config_get_manufacturing_pg10(struct MPT2SAS_ADAPTER *ioc,
 {
         Mpi2ConfigRequest_t mpi_request;
         int r;
-        struct config_request mem;
 
-        memset(config_page, 0, sizeof(Mpi2ManufacturingPage10_t));
         memset(&mpi_request, 0, sizeof(Mpi2ConfigRequest_t));
         mpi_request.Function = MPI2_FUNCTION_CONFIG;
         mpi_request.Action = MPI2_CONFIG_ACTION_PAGE_HEADER;
@@ -451,37 +482,14 @@ mpt2sas_config_get_manufacturing_pg10(struct MPT2SAS_ADAPTER *ioc,
         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(Mpi2ManufacturingPage10_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 +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;
@@ -512,37 +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;
 }
@@ -562,9 +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;
@@ -573,37 +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;
 }
@@ -623,9 +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;
@@ -634,37 +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;
 }
@@ -684,9 +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;
@@ -695,37 +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;
 }
@@ -741,11 +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;
@@ -755,38 +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;
 }
@@ -806,9 +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;
@@ -817,37 +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;
 }
@@ -869,9 +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;
@@ -881,39 +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;
 }
@@ -935,9 +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;
@@ -947,39 +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;
 }
@@ -997,11 +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;
@@ -1011,44 +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;
 }
@@ -1072,8 +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;
@@ -1083,37 +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;
 }
@@ -1137,9 +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;
@@ -1149,37 +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;
 }
@@ -1201,9 +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;
@@ -1213,39 +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;
 }
@@ -1268,9 +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;
@@ -1280,7 +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;
 
@@ -1288,33 +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;
 }
@@ -1336,9 +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;
@@ -1348,39 +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;
 }
@@ -1401,9 +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;
@@ -1413,40 +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;
 }
@@ -1467,9 +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;
@@ -1479,40 +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;
 }
@@ -1535,9 +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;
@@ -1546,38 +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;
 }
@@ -1596,10 +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));
@@ -1611,43 +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;
 }
@@ -1671,10 +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;
@@ -1682,37 +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;
 }
@@ -1735,10 +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;
@@ -1746,38 +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;
 }
@@ -1795,11 +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;
@@ -1812,40 +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) !=
@@ -1856,15 +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_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index e71a6c04298b..774b34525bba 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -1836,6 +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);