diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c
index 045cabd3d4b4..f322b6a441d8 100644
--- a/block/scsi_ioctl.c
+++ b/block/scsi_ioctl.c
@@ -271,13 +271,6 @@ static int sg_io(struct file *file, request_queue_t *q,
 
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
 
-	/*
-	 * bounce this after holding a reference to the original bio, it's
-	 * needed for proper unmapping
-	 */
-	if (rq->bio)
-		blk_queue_bounce(q, &rq->bio);
-
 	rq->timeout = jiffies_to_msecs(hdr->timeout);
 	if (!rq->timeout)
 		rq->timeout = q->sg_timeout;