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blk-mq: idle all hardware contexts before freeing a queue

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Without this we can leak the active_queues reference if a command is
freed while it is considered active.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Christoph Hellwig 2014-05-26 11:45:02 +02:00 • committed by Jens Axboe
commit 19c5d84f14
1 changed files with 1 additions and 0 deletions
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block/blk-mq.c
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@ -1844,6 +1844,7 @@ void blk_mq_free_queue(struct request_queue *q)
blk_mq_del_queue_tag_set(q); blk_mq_del_queue_tag_set(q);
queue_for_each_hw_ctx(q, hctx, i) { queue_for_each_hw_ctx(q, hctx, i) {
blk_mq_tag_idle(hctx);
kfree(hctx->ctxs); kfree(hctx->ctxs);
blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier); blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);
if (q->mq_ops->exit_hctx) if (q->mq_ops->exit_hctx)