bfa: Use dma_zalloc_coherent

Use the zeroing function instead of dma_alloc_coherent & memset(,0,)
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Anil Gurumurthy <anil.gurumurthy@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/bfa/bfad_bsg.c

@@ -3270,13 +3270,13 @@ bfad_fcxp_map_sg(struct bfad_s *bfad, void *payload_kbuf,
 	/* Allocate dma coherent memory */
 	buf_info = buf_base;
 	buf_info->size = payload_len;
-	buf_info->virt = dma_alloc_coherent(&bfad->pcidev->dev, buf_info->size,
-					&buf_info->phys, GFP_KERNEL);
+	buf_info->virt = dma_zalloc_coherent(&bfad->pcidev->dev,
+					     buf_info->size, &buf_info->phys,
+					     GFP_KERNEL);
 	if (!buf_info->virt)
 		goto out_free_mem;
 
 	/* copy the linear bsg buffer to buf_info */
-	memset(buf_info->virt, 0, buf_info->size);
 	memcpy(buf_info->virt, payload_kbuf, buf_info->size);
 
 	/*