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authorKeith Busch <keith.busch@intel.com>2014-06-06 10:22:07 -0600
committerJens Axboe <axboe@fb.com>2014-06-06 10:40:03 -0600
commit3b632cf0eaa2e89a12c18f043e6e7c5bcc003645 (patch)
tree91311650aee107995e71b98cdb53f47fe3e8b1dd /block
parenta4391c6465d9c978fd4bded12e34bdde3f5458f0 (diff)
blk-mq: don't allow queue entering for a dying queue
If the queue is going away, don't let new allocs or queueing happen on it. Go through the normal wait process, and exit with ENODEV in that case. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block')
-rw-r--r--block/blk-mq.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index a6ee74e2795..75fc33f3425 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -82,8 +82,10 @@ static int blk_mq_queue_enter(struct request_queue *q)
__percpu_counter_add(&q->mq_usage_counter, 1, 1000000);
smp_wmb();
- /* we have problems to freeze the queue if it's initializing */
- if (!blk_queue_bypass(q) || !blk_queue_init_done(q))
+
+ /* we have problems freezing the queue if it's initializing */
+ if (!blk_queue_dying(q) &&
+ (!blk_queue_bypass(q) || !blk_queue_init_done(q)))
return 0;
__percpu_counter_add(&q->mq_usage_counter, -1, 1000000);