From: Omar Sandoval <osandov@fb.com>
Date: Mon, 14 Nov 2016 22:56:17 +0000 (-0800)
Subject: loop: return proper error from loop_queue_rq()
X-Git-Tag: firefly_0821_release~176^2~4^2~7^2~21
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=ffef1630187bd6ed8521a90d8dfcd27bd8c8cf36;p=firefly-linux-kernel-4.4.55.git

loop: return proper error from loop_queue_rq()

commit b4a567e8114327518c09f5632339a5954ab975a3 upstream.

->queue_rq() should return one of the BLK_MQ_RQ_QUEUE_* constants, not
an errno.

Fixes: f4aa4c7bbac6 ("block: loop: convert to per-device workqueue")
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/block/loop.c b/drivers/block/loop.c
index 80cf8add46ff..ab0b2dd3f629 100644
--- a/drivers/block/loop.c
+++ b/drivers/block/loop.c
@@ -1657,7 +1657,7 @@ static int loop_queue_rq(struct blk_mq_hw_ctx *hctx,
 	blk_mq_start_request(bd->rq);
 
 	if (lo->lo_state != Lo_bound)
-		return -EIO;
+		return BLK_MQ_RQ_QUEUE_ERROR;
 
 	if (lo->use_dio && !(cmd->rq->cmd_flags & (REQ_FLUSH |
 					REQ_DISCARD)))