From 19c5d84f14d2b01fe4c24e1444142f69e6dc08f6 Mon Sep 17 00:00:00 2001
From: Christoph Hellwig <hch@lst.de>
Date: Mon, 26 May 2014 11:45:02 +0200
Subject: [PATCH] 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>
---
block/blk-mq.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 9bc075335d06..62082c5daae7 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1844,6 +1844,7 @@ void blk_mq_free_queue(struct request_queue *q)
blk_mq_del_queue_tag_set(q);
queue_for_each_hw_ctx(q, hctx, i) {
+ blk_mq_tag_idle(hctx);
kfree(hctx->ctxs);
blk_mq_unregister_cpu_notifier(&hctx->cpu_notifier);
if (q->mq_ops->exit_hctx)