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| author | Tejun Heo <tj@kernel.org> | 2011-12-14 00:33:37 +0100 |
|---|---|---|
| committer | Ziyan <jaraidaniel@gmail.com> | 2016-01-08 10:36:47 +0100 |
| commit | 02e1d3f46f63e0ee9c97e5d5748efbc68128dfd8 (patch) | |
| tree | 04d592cf2478ada8a4631fe790836627c5f096ee /block/blk-core.c | |
| parent | cb316cfb3a35d948a21e34869f442b72014e837e (diff) | |
| download | kernel_samsung_tuna-02e1d3f46f63e0ee9c97e5d5748efbc68128dfd8.zip kernel_samsung_tuna-02e1d3f46f63e0ee9c97e5d5748efbc68128dfd8.tar.gz kernel_samsung_tuna-02e1d3f46f63e0ee9c97e5d5748efbc68128dfd8.tar.bz2 | |
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-core.c')
| -rw-r--r-- | block/blk-core.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 18c2ef0..1452ee3 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1720,6 +1720,10 @@ int blk_insert_cloned_request(struct request_queue *q, struct request *rq) return -EIO; spin_lock_irqsave(q->queue_lock, flags); + if (unlikely(blk_queue_dead(q))) { + spin_unlock_irqrestore(q->queue_lock, flags); + return -ENODEV; + } /* * Submitting request must be dequeued before calling this function @@ -2694,6 +2698,14 @@ static void queue_unplugged(struct request_queue *q, unsigned int depth, trace_block_unplug(q, depth, !from_schedule); /* + * Don't mess with dead queue. + */ + if (unlikely(blk_queue_dead(q))) { + spin_unlock(q->queue_lock); + return; + } + + /* * If we are punting this to kblockd, then we can safely drop * the queue_lock before waking kblockd (which needs to take * this lock). @@ -2769,6 +2781,15 @@ void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule) depth = 0; spin_lock(q->queue_lock); } + + /* + * Short-circuit if @q is dead + */ + if (unlikely(blk_queue_dead(q))) { + __blk_end_request_all(rq, -ENODEV); + continue; + } + /* * rq is already accounted, so use raw insert */ |