blk-mq: idle all hardware contexts before freeing a queue
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>
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@ -1844,6 +1844,7 @@ void blk_mq_free_queue(struct request_queue *q)
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blk_mq_del_queue_tag_set(q);
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queue_for_each_hw_ctx(q, hctx, i) {
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blk_mq_tag_idle(hctx);
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kfree(hctx->ctxs);
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blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);
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if (q->mq_ops->exit_hctx)
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