scsi: mpt3sas: Fix sparse warnings

1) Used variable __le64/__le32 whichever required in building NVME
PRP, and passed to LE Controller.

2) Remove unused functions, And Declared functions as static which are
used only in mpt3sas_scsih.c.
Signed-off-by: NChaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: NSuganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/mpt3sas/mpt3sas_base.c

@@ -1437,8 +1437,8 @@ _base_build_nvme_prp(struct MPT3SAS_ADAPTER *ioc, u16 smid,
 	size_t data_in_sz)
 {
 	int		prp_size = NVME_PRP_SIZE;
-	u64		*prp_entry, *prp1_entry, *prp2_entry, *prp_entry_phys;
-	u64		*prp_page, *prp_page_phys;
+	__le64		*prp_entry, *prp1_entry, *prp2_entry, *prp_entry_phys;
+	__le64		*prp_page, *prp_page_phys;
 	u32		offset, entry_len;
 	u32		page_mask_result, page_mask;
 	dma_addr_t	paddr;
@@ -1455,17 +1455,17 @@ _base_build_nvme_prp(struct MPT3SAS_ADAPTER *ioc, u16 smid,
 	 * PRP1 is located at a 24 byte offset from the start of the NVMe
 	 * command.  Then set the current PRP entry pointer to PRP1.
 	 */
-	prp1_entry = (u64 *)(nvme_encap_request->NVMe_Command +
+	prp1_entry = (__le64 *)(nvme_encap_request->NVMe_Command +
 	    NVME_CMD_PRP1_OFFSET);
-	prp2_entry = (u64 *)(nvme_encap_request->NVMe_Command +
+	prp2_entry = (__le64 *)(nvme_encap_request->NVMe_Command +
 	    NVME_CMD_PRP2_OFFSET);
 	prp_entry = prp1_entry;
 	/*
 	 * For the PRP entries, use the specially allocated buffer of
 	 * contiguous memory.
 	 */
-	prp_page = (u64 *)mpt3sas_base_get_pcie_sgl(ioc, smid);
-	prp_page_phys = (u64 *)mpt3sas_base_get_pcie_sgl_dma(ioc, smid);
+	prp_page = (__le64 *)mpt3sas_base_get_pcie_sgl(ioc, smid);
+	prp_page_phys = (__le64 *)mpt3sas_base_get_pcie_sgl_dma(ioc, smid);
 
 	/*
 	 * Check if we are within 1 entry of a page boundary we don't
@@ -1475,8 +1475,8 @@ _base_build_nvme_prp(struct MPT3SAS_ADAPTER *ioc, u16 smid,
 	page_mask_result = (uintptr_t)((u8 *)prp_page + prp_size) & page_mask;
 	if (!page_mask_result) {
 		/* Bump up to next page boundary. */
-		prp_page = (u64 *)((u8 *)prp_page + prp_size);
-		prp_page_phys = (u64 *)((u8 *)prp_page_phys + prp_size);
+		prp_page = (__le64 *)((u8 *)prp_page + prp_size);
+		prp_page_phys = (__le64 *)((u8 *)prp_page_phys + prp_size);
 	}
 
 	/*
@@ -1604,7 +1604,7 @@ _base_build_nvme_prp(struct MPT3SAS_ADAPTER *ioc, u16 smid,
  * Returns:		true: PRPs are built
  *			false: IEEE SGLs needs to be built
  */
-void
+static void
 base_make_prp_nvme(struct MPT3SAS_ADAPTER *ioc,
 		struct scsi_cmnd *scmd,
 		Mpi25SCSIIORequest_t *mpi_request,
@@ -1612,7 +1612,7 @@ base_make_prp_nvme(struct MPT3SAS_ADAPTER *ioc,
 {
 	int sge_len, offset, num_prp_in_chain = 0;
 	Mpi25IeeeSgeChain64_t *main_chain_element, *ptr_first_sgl;
-	u64 *curr_buff;
+	__le64 *curr_buff;
 	dma_addr_t msg_phys;
 	u64 sge_addr;
 	u32 page_mask, page_mask_result;
@@ -1740,7 +1740,7 @@ base_is_prp_possible(struct MPT3SAS_ADAPTER *ioc,
 	struct scatterlist *sg_scmd;
 	bool build_prp = true;
 
-	data_length = cpu_to_le32(scsi_bufflen(scmd));
+	data_length = scsi_bufflen(scmd);
 	sg_scmd = scsi_sglist(scmd);
 
 	/* If Datalenth is <= 16K and number of SGE’s entries are <= 2

drivers/scsi/mpt3sas/mpt3sas_scsih.c

@@ -599,7 +599,7 @@ __mpt3sas_get_pdev_from_target(struct MPT3SAS_ADAPTER *ioc,
  *
  * This searches for pcie_device from target, then return pcie_device object.
  */
-struct _pcie_device *
+static struct _pcie_device *
 mpt3sas_get_pdev_from_target(struct MPT3SAS_ADAPTER *ioc,
 	struct MPT3SAS_TARGET *tgt_priv)
 {
@@ -942,7 +942,7 @@ _scsih_sas_device_init_add(struct MPT3SAS_ADAPTER *ioc,
 }
 
 
-struct _pcie_device *
+static struct _pcie_device *
 __mpt3sas_get_pdev_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
 {
 	struct _pcie_device *pcie_device;
@@ -975,7 +975,7 @@ __mpt3sas_get_pdev_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
  *
  * This searches for pcie_device based on wwid, then return pcie_device object.
  */
-struct _pcie_device *
+static struct _pcie_device *
 mpt3sas_get_pdev_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
 {
 	struct _pcie_device *pcie_device;
@@ -989,7 +989,7 @@ mpt3sas_get_pdev_by_wwid(struct MPT3SAS_ADAPTER *ioc, u64 wwid)
 }
 
 
-struct _pcie_device *
+static struct _pcie_device *
 __mpt3sas_get_pdev_by_idchannel(struct MPT3SAS_ADAPTER *ioc, int id,
 	int channel)
 {
@@ -1012,34 +1012,7 @@ __mpt3sas_get_pdev_by_idchannel(struct MPT3SAS_ADAPTER *ioc, int id,
 	return pcie_device;
 }
 
-
-/**
- * mpt3sas_get_pdev_by_idchannel - pcie device search
- * @ioc: per adapter object
- * @id: Target ID
- * @channel: Channel ID
- *
- * Context: This function will acquire ioc->pcie_device_lock and will release
- * before returning the pcie_device object.
- *
- * This searches for pcie_device based on id and channel, then return
- * pcie_device object.
- */
-struct _pcie_device *
-mpt3sas_get_pdev_by_idchannel(struct MPT3SAS_ADAPTER *ioc, int id, int channel)
-{
-	struct _pcie_device *pcie_device;
-	unsigned long flags;
-
-	spin_lock_irqsave(&ioc->pcie_device_lock, flags);
-	pcie_device = __mpt3sas_get_pdev_by_idchannel(ioc, id, channel);
-	spin_unlock_irqrestore(&ioc->pcie_device_lock, flags);
-
-	return pcie_device;
-}
-
-
-struct _pcie_device *
+static struct _pcie_device *
 __mpt3sas_get_pdev_by_handle(struct MPT3SAS_ADAPTER *ioc, u16 handle)
 {
 	struct _pcie_device *pcie_device;