4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
[ Upstream commit 07d1b99825f40f9c0d93e6b99d79a08d0717bac1 ]
When a mutex lock is not used any more, the function mutex_destroy
should be called to mark the mutex lock uninitialized.
Fixes: f2298c0403b0 ("null_blk: multi queue aware block test driver")
Signed-off-by: Zhu Yanjun <yanjun.zhu@xxxxxxxxx>
Link: https://lore.kernel.org/r/20240425171635.4227-1-yanjun.zhu@xxxxxxxxx
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/block/null_blk_main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index 5553df736c720..fb20ed1360f99 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -1967,6 +1967,8 @@ static void __exit null_exit(void)
if (g_queue_mode == NULL_Q_MQ && shared_tags)
blk_mq_free_tag_set(&tag_set);
+
+ mutex_destroy(&lock);
}
module_init(null_init);
--
2.43.0
