scsi: virtio_scsi: Convert to scsi_execute_cmd()

scsi_execute_req() is going to be removed. Convert virtio_scsi to
scsi_execute_cmd().
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/virtio_scsi.c

@@ -347,8 +347,8 @@ static void virtscsi_rescan_hotunplug(struct virtio_scsi *vscsi)
 
 		memset(inq_result, 0, inq_result_len);
 
-		result = scsi_execute_req(sdev, scsi_cmd, DMA_FROM_DEVICE,
-					  inq_result, inquiry_len, NULL,
+		result = scsi_execute_cmd(sdev, scsi_cmd, REQ_OP_DRV_IN,
+					  inq_result, inquiry_len,
 					  SD_TIMEOUT, SD_MAX_RETRIES, NULL);
 
 		if (result == 0 && inq_result[0] >> 5) {