6.1-stable review patch. If anyone has any objections, please let me know.
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From: Justin Sanders jsanders.devel@gmail.com
[ Upstream commit 7f90d45e57cb2ef1f0adcaf925ddffdfc5e680ca ]
An aoe device's rq_list contains accepted block requests that are waiting to be transmitted to the aoe target. This queue was added as part of the conversion to blk_mq. However, the queue was not cleaned out when an aoe device is downed which caused blk_mq_freeze_queue() to sleep indefinitely waiting for those requests to complete, causing a hang. This fix cleans out the queue before calling blk_mq_freeze_queue().
Link: https://bugzilla.kernel.org/show_bug.cgi?id=212665 Fixes: 3582dd291788 ("aoe: convert aoeblk to blk-mq") Signed-off-by: Justin Sanders jsanders.devel@gmail.com Link: https://lore.kernel.org/r/20250610170600.869-1-jsanders.devel@gmail.com Tested-By: Valentin Kleibel valentin@vrvis.at Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/block/aoe/aoedev.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c index 3523dd82d7a00..280679bde3a50 100644 --- a/drivers/block/aoe/aoedev.c +++ b/drivers/block/aoe/aoedev.c @@ -198,6 +198,7 @@ aoedev_downdev(struct aoedev *d) { struct aoetgt *t, **tt, **te; struct list_head *head, *pos, *nx; + struct request *rq, *rqnext; int i;
d->flags &= ~DEVFL_UP; @@ -223,6 +224,13 @@ aoedev_downdev(struct aoedev *d) /* clean out the in-process request (if any) */ aoe_failip(d);
+ /* clean out any queued block requests */ + list_for_each_entry_safe(rq, rqnext, &d->rq_list, queuelist) { + list_del_init(&rq->queuelist); + blk_mq_start_request(rq); + blk_mq_end_request(rq, BLK_STS_IOERR); + } + /* fast fail all pending I/O */ if (d->blkq) { /* UP is cleared, freeze+quiesce to insure all are errored */