diff options
| author | Tejun Heo <tj@kernel.org> | 2011-12-14 00:33:37 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2011-12-14 00:33:37 +0100 |
| commit | 8ba61435d73f2274e12d4d823fde06735e8f6a54 (patch) | |
| tree | 4b63993dc0fdc26918bd990fb47a142b8d24ef80 /block/blk-exec.c | |
| parent | 481a7d64790cd7ca61a8bbcbd9d017ce58e6fe39 (diff) | |
| download | lwn-8ba61435d73f2274e12d4d823fde06735e8f6a54.tar.gz lwn-8ba61435d73f2274e12d4d823fde06735e8f6a54.zip | |
block: add missing blk_queue_dead() checks
blk_insert_cloned_request(), blk_execute_rq_nowait() and
blk_flush_plug_list() either didn't check whether the queue was dead
or did it without holding queue_lock. Update them so that dead state
is checked while holding queue_lock.
AFAICS, this plugs all holes (requeue doesn't matter as the request is
transitioning atomically from in_flight to queued).
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-exec.c')
| -rw-r--r-- | block/blk-exec.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-exec.c b/block/blk-exec.c index 60532852b3ab..fb2cbd551621 100644 --- a/block/blk-exec.c +++ b/block/blk-exec.c @@ -50,7 +50,11 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk, { int where = at_head ? ELEVATOR_INSERT_FRONT : ELEVATOR_INSERT_BACK; + WARN_ON(irqs_disabled()); + spin_lock_irq(q->queue_lock); + if (unlikely(blk_queue_dead(q))) { + spin_unlock_irq(q->queue_lock); rq->errors = -ENXIO; if (rq->end_io) rq->end_io(rq, rq->errors); @@ -59,8 +63,6 @@ void blk_execute_rq_nowait(struct request_queue *q, struct gendisk *bd_disk, rq->rq_disk = bd_disk; rq->end_io = done; - WARN_ON(irqs_disabled()); - spin_lock_irq(q->queue_lock); __elv_add_request(q, rq, where); __blk_run_queue(q); /* the queue is stopped so it won't be run */ |