qla2xxx: 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: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

drivers/scsi/qla2xxx/qla_init.c

@@ -1526,7 +1526,7 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha)
 			    FCE_SIZE, ha->fce, ha->fce_dma);
 
 		/* Allocate memory for Fibre Channel Event Buffer. */
-		tc = dma_alloc_coherent(&ha->pdev->dev, FCE_SIZE, &tc_dma,
+		tc = dma_zalloc_coherent(&ha->pdev->dev, FCE_SIZE, &tc_dma,
 					 GFP_KERNEL);
 		if (!tc) {
 			ql_log(ql_log_warn, vha, 0x00be,
@@ -1535,7 +1535,6 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha)
 			goto try_eft;
 		}
 
-		memset(tc, 0, FCE_SIZE);
 		rval = qla2x00_enable_fce_trace(vha, tc_dma, FCE_NUM_BUFFERS,
 		    ha->fce_mb, &ha->fce_bufs);
 		if (rval) {
@@ -1560,7 +1559,7 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha)
 			    EFT_SIZE, ha->eft, ha->eft_dma);
 
 		/* Allocate memory for Extended Trace Buffer. */
-		tc = dma_alloc_coherent(&ha->pdev->dev, EFT_SIZE, &tc_dma,
+		tc = dma_zalloc_coherent(&ha->pdev->dev, EFT_SIZE, &tc_dma,
 					 GFP_KERNEL);
 		if (!tc) {
 			ql_log(ql_log_warn, vha, 0x00c1,
@@ -1569,7 +1568,6 @@ qla2x00_alloc_fw_dump(scsi_qla_host_t *vha)
 			goto cont_alloc;
 		}
 
-		memset(tc, 0, EFT_SIZE);
 		rval = qla2x00_enable_eft_trace(vha, tc_dma, EFT_NUM_BUFFERS);
 		if (rval) {
 			ql_log(ql_log_warn, vha, 0x00c2,