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block: call blk_exit_queue() before freeing q->stats 

blk_stat_disable_accounting() is added in commit 68497092bd
("block: make queue stat accounting a reference"), and called in
kyber_exit_sched().

So we have to free q->stats after elevator is unloaded from
blk_exit_queue() in blk_release_queue(). Otherwise kernel panic
is caused.

Fixes: 68497092bd ("block: make queue stat accounting a reference")
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20211221040436.1333880-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ming Lei 2021-12-21 12:04:36 +08:00 committed by Jens Axboe
parent a957b61254
commit 37e11c3616
1 changed files with 2 additions and 2 deletions
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4
block/blk-sysfs.c
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@ -791,11 +791,11 @@ static void blk_release_queue(struct kobject *kobj)
blk_stat_remove_callback(q, q->poll_cb);
blk_stat_free_callback(q->poll_cb);
blk_exit_queue(q);
blk_free_queue_stats(q->stats);
kfree(q->poll_stat);
blk_exit_queue(q);
blk_queue_free_zone_bitmaps(q);
if (queue_is_mq(q))