The md->wait waitqueue is used by both bio-based and request-based DM. Commit dbd3bbd291 ("dm rq: leverage blk_mq_queue_busy() to check for outstanding IO") lost sight of the requirement that dm_wait_for_completion() must work with all types of DM devices. Fix md_in_flight() to call the blk-mq or bio-based method accordingly. Fixes: dbd3bbd291 ("dm rq: leverage blk_mq_queue_busy() to check for outstanding IO") Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> --- drivers/md/dm-rq.c | 6 ++---- drivers/md/dm.c | 10 +++++++++- 2 files changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c index 5af22e165fb7..202e9be5aea7 100644 --- a/drivers/md/dm-rq.c +++ b/drivers/md/dm-rq.c @@ -131,10 +131,8 @@ static void rq_end_stats(struct mapped_device *md, struct request *orig) static void rq_completed(struct mapped_device *md) { /* nudge anyone waiting on suspend queue */ - if (unlikely(waitqueue_active(&md->wait))) { - if (!blk_mq_queue_busy(md->queue)) - wake_up(&md->wait); - } + if (unlikely(waitqueue_active(&md->wait))) + wake_up(&md->wait); /* * dm_put() must be at the end of this function. See the comment above diff --git a/drivers/md/dm.c b/drivers/md/dm.c index d80c34a34a2d..3a50675cfc1a 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -646,7 +646,7 @@ static void free_tio(struct dm_target_io *tio) bio_put(&tio->clone); } -static bool md_in_flight(struct mapped_device *md) +static bool md_in_flight_bios(struct mapped_device *md) { int cpu; struct hd_struct *part = &dm_disk(md)->part0; @@ -660,6 +660,14 @@ static bool md_in_flight(struct mapped_device *md) return sum != 0; } +static bool md_in_flight(struct mapped_device *md) +{ + if (queue_is_mq(md->queue)) + return blk_mq_queue_busy(md->queue); + else + return md_in_flight_bios(md); +} + static void start_io_acct(struct dm_io *io) { struct mapped_device *md = io->md; -- 2.15.0 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel