diff options
| author | Bart Van Assche <[email protected]> | 2016-08-16 16:48:36 -0700 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2016-08-16 19:36:14 -0600 |
| commit | 1b856086813be9371929b6cc62045f9fd470f5a0 (patch) | |
| tree | 2ed054abb499ec7f19b63f9f5b24acff932d079f | |
| parent | 7afafc8a44bf0ab841b17d450b02aedb3a138985 (diff) | |
block: Fix race triggered by blk_set_queue_dying()
blk_set_queue_dying() can be called while another thread is
submitting I/O or changing queue flags, e.g. through dm_stop_queue().
Hence protect the QUEUE_FLAG_DYING flag change with locking.
Signed-off-by: Bart Van Assche <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Mike Snitzer <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
| -rw-r--r-- | block/blk-core.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 999442ec4601..36c7ac328d8c 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -515,7 +515,9 @@ EXPORT_SYMBOL_GPL(blk_queue_bypass_end); void blk_set_queue_dying(struct request_queue *q) { - queue_flag_set_unlocked(QUEUE_FLAG_DYING, q); + spin_lock_irq(q->queue_lock); + queue_flag_set(QUEUE_FLAG_DYING, q); + spin_unlock_irq(q->queue_lock); if (q->mq_ops) blk_mq_wake_waiters(q); |