[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>

1 files changed, 199 insertions, 712 deletions

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;
 }