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authorMike Snitzer <snitzer@redhat.com>2018-12-11 17:10:26 +0300
committerJens Axboe <axboe@kernel.dk>2018-12-11 17:40:02 +0300
commitc4576aed8d85d808cd6443bda58393d525207d01 (patch)
tree909ff78658e5c82da4e8d575da1457dcaccd79bd /drivers/md
parent6451fe73fa0f542a49bfacd7205b88a597897f58 (diff)
downloadlinux-c4576aed8d85d808cd6443bda58393d525207d01.tar.xz
dm: fix request-based dm's use of dm_wait_for_completion
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@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-rq.c6
-rw-r--r--drivers/md/dm.c10
2 files changed, 11 insertions, 5 deletions
diff --git a/drivers/md/dm-rq.c b/drivers/md/dm-rq.c
index d2397d8fcbd1..4e06be4f0a62 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, int rw, bool run_queue)
{
/* 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 79ad4b3d215c..c414d40d645d 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;