scsi: qla4xxx: Use dma_pool_zalloc()

Use dma_pool_zalloc() instead of dma_pool_alloc + memset
Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com>
Acked-by: Manish Rangankar <Manish.Rangankar@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/qla4xxx/ql4_mbx.c

@@ -1584,12 +1584,11 @@ int qla4xxx_get_chap(struct scsi_qla_host *ha, char *username, char *password,
 	struct ql4_chap_table *chap_table;
 	dma_addr_t chap_dma;
 
-	chap_table = dma_pool_alloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
+	chap_table = dma_pool_zalloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
 	if (chap_table == NULL)
 		return -ENOMEM;
 
 	chap_size = sizeof(struct ql4_chap_table);
-	memset(chap_table, 0, chap_size);
 
 	if (is_qla40XX(ha))
 		offset = FLASH_CHAP_OFFSET | (idx * chap_size);
@@ -1648,13 +1647,12 @@ int qla4xxx_set_chap(struct scsi_qla_host *ha, char *username, char *password,
 	uint32_t chap_size = 0;
 	dma_addr_t chap_dma;
 
-	chap_table = dma_pool_alloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
+	chap_table = dma_pool_zalloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
 	if (chap_table == NULL) {
 		ret =  -ENOMEM;
 		goto exit_set_chap;
 	}
 
-	memset(chap_table, 0, sizeof(struct ql4_chap_table));
 	if (bidi)
 		chap_table->flags |= BIT_6; /* peer */
 	else

drivers/scsi/qla4xxx/ql4_os.c

@@ -825,12 +825,10 @@ static int qla4xxx_delete_chap(struct Scsi_Host *shost, uint16_t chap_tbl_idx)
 	uint32_t chap_size;
 	int ret = 0;
 
-	chap_table = dma_pool_alloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
+	chap_table = dma_pool_zalloc(ha->chap_dma_pool, GFP_KERNEL, &chap_dma);
 	if (chap_table == NULL)
 		return -ENOMEM;
 
-	memset(chap_table, 0, sizeof(struct ql4_chap_table));
-
 	if (is_qla80XX(ha))
 		max_chap_entries = (ha->hw.flt_chap_size / 2) /
 				   sizeof(struct ql4_chap_table);