blk_stat_disable_accounting() is added in commit 68497092bde9
("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: 68497092bde9 ("block: make queue stat accounting a reference")
Signed-off-by: Ming Lei <ming.lei@xxxxxxxxxx>
---
block/blk-sysfs.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 3e6357321225..e20eadfcf5c8 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -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))
--
2.31.1
