[xenial:linux-azure,14/15] blk-mq: fail the request in case issue failure
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Message ID 20191127201820.32174-15-marcelo.cerri@canonical.com
State New
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Series
  • Bug #1848739 - [linux-azure] Patch to prevent possible data corruption
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Commit Message

Marcelo Henrique Cerri Nov. 27, 2019, 8:18 p.m. UTC
From: Ming Lei <ming.lei@redhat.com>

BugLink: https://bugs.launchpad.net/bugs/1848739

Inside blk_mq_try_issue_list_directly(), if the request is issued as
failed, we shouldn't try to do it again, otherwise the warning in
blk_mq_start_request() will be triggered. This change is aligned to
behaviour of other ways of request issue & dispatch.

Fixes: 6ce3dd6eec1 ("blk-mq: issue directly if hw queue isn't busy in case of 'none'")
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: Laurence Oberman <loberman@redhat.com>
Cc: Omar Sandoval <osandov@fb.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Bart Van Assche <bart.vanassche@wdc.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Kashyap Desai <kashyap.desai@broadcom.com>
Cc: kernel test robot <rong.a.chen@intel.com>
Cc: LKP <lkp@01.org>
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
(cherry picked from commit 8824f62246bef288173a6624a363352f0d4d3b09)
Signed-off-by: Marcelo Henrique Cerri <marcelo.cerri@canonical.com>
---
 block/blk-mq.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

Patch
diff mbox series

diff --git a/block/blk-mq.c b/block/blk-mq.c
index f539357f5d3b..6a1b7e3af232 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1895,8 +1895,12 @@  void blk_mq_try_issue_list_directly(struct blk_mq_hw_ctx *hctx,
 		list_del_init(&rq->queuelist);
 		ret = blk_mq_request_issue_directly(rq);
 		if (ret != BLK_STS_OK) {
-			list_add(&rq->queuelist, list);
-			break;
+			if (ret == BLK_STS_RESOURCE ||
+					ret == BLK_STS_DEV_RESOURCE) {
+				list_add(&rq->queuelist, list);
+				break;
+			}
+			blk_mq_end_request(rq, ret);
 		}
 	}
 }