scsi: qla2xxx: use lower_32_bits and upper_32_bits instead of reinventing them

This also moves the optimization for builds with 32-bit dma_addr_t to
the compiler (where it belongs) instead of opencoding it based on
incorrect assumptions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla2xxx/qla_target.c

@@ -2660,9 +2660,9 @@ static void qlt_load_cont_data_segments(struct qla_tgt_prm *prm)
 		    cnt < QLA_TGT_DATASEGS_PER_CONT_24XX && prm->seg_cnt;
 		    cnt++, prm->seg_cnt--) {
 			*dword_ptr++ =
-			    cpu_to_le32(pci_dma_lo32
+			    cpu_to_le32(lower_32_bits
 				(sg_dma_address(prm->sg)));
-			*dword_ptr++ = cpu_to_le32(pci_dma_hi32
+			*dword_ptr++ = cpu_to_le32(upper_32_bits
 			    (sg_dma_address(prm->sg)));
 			*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));
 
@@ -2704,9 +2704,9 @@ static void qlt_load_data_segments(struct qla_tgt_prm *prm)
 	    (cnt < QLA_TGT_DATASEGS_PER_CMD_24XX) && prm->seg_cnt;
 	    cnt++, prm->seg_cnt--) {
 		*dword_ptr++ =
-		    cpu_to_le32(pci_dma_lo32(sg_dma_address(prm->sg)));
+		    cpu_to_le32(lower_32_bits(sg_dma_address(prm->sg)));
 
-		*dword_ptr++ = cpu_to_le32(pci_dma_hi32(
+		*dword_ptr++ = cpu_to_le32(upper_32_bits(
 			sg_dma_address(prm->sg)));
 
 		*dword_ptr++ = cpu_to_le32(sg_dma_len(prm->sg));

drivers/scsi/qla2xxx/qla_target.h

@@ -771,14 +771,6 @@ int qla2x00_wait_for_hba_online(struct scsi_qla_host *);
 #define	FC_TM_REJECT                4
 #define FC_TM_FAILED                5
 
-#if (BITS_PER_LONG > 32) || defined(CONFIG_HIGHMEM64G)
-#define pci_dma_lo32(a) (a & 0xffffffff)
-#define pci_dma_hi32(a) ((((a) >> 16)>>16) & 0xffffffff)
-#else
-#define pci_dma_lo32(a) (a & 0xffffffff)
-#define pci_dma_hi32(a) 0
-#endif
-
 #define QLA_TGT_SENSE_VALID(sense)  ((sense != NULL) && \
 				(((const uint8_t *)(sense))[0] & 0x70) == 0x70)