Some data are leaked when blk_cleanup_queue() interface
is called.

CC: Jens Axboe <ax...@kernel.dk>
CC: linux-n...@lists.infradead.org
Signed-off-by: Alexander Gordeev <agord...@redhat.com>
---
 block/blk-mq.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 13f5a6c..90e3fef 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1707,8 +1707,13 @@ static void blk_mq_free_hw_queues(struct request_queue 
*q,
        struct blk_mq_hw_ctx *hctx;
        unsigned int i;
 
-       queue_for_each_hw_ctx(q, hctx, i)
+       queue_for_each_hw_ctx(q, hctx, i) {
                free_cpumask_var(hctx->cpumask);
+               kfree(hctx->ctxs);
+               kfree(hctx);
+       }
+
+       q->nr_hw_queues = 0;
 }
 
 static int blk_mq_init_hctx(struct request_queue *q,
-- 
1.8.3.1

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