[PATCH 19/24] scsi_ioctl: return error code when blk_map_user() fails

[Hannes Reinecke <hare@xxxxxxx>]

When failing to map the user buffer we should return the actual
error code, avoiding the usage of DRIVER_ERROR.

Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
 block/scsi_ioctl.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index f5e0ad65e86a..1ab1b8d9641c 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -485,9 +485,10 @@ int sg_scsi_ioctl(struct request_queue *q, struct gendisk *disk, fmode_t mode,
 		break;
 	}
 
-	if (bytes && blk_rq_map_kern(q, rq, buffer, bytes, GFP_NOIO)) {
-		err = DRIVER_ERROR << 24;
-		goto error;
+	if (bytes) {
+		err = blk_rq_map_kern(q, rq, buffer, bytes, GFP_NOIO);
+		if (err)
+			goto error;
 	}
 
 	blk_execute_rq(q, disk, rq, 0);
-- 
2.16.4