From: Zhu Yanjun <yanjun.zhu@linux.dev>
Date: Thu, 25 Apr 2024 17:16:35 +0000 (+0200)
Subject: null_blk: Fix missing mutex_destroy() at module removal
X-Git-Tag: v6.8.12~348
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fcdac0720f0979f1e3d568353ac28642f86306e6;p=thirdparty%2Fkernel%2Fstable.git

null_blk: Fix missing mutex_destroy() at module removal

[ 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@linux.dev>
Link: https://lore.kernel.org/r/20240425171635.4227-1-yanjun.zhu@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c
index 36755f263e8ec..3584f389b92ce 100644
--- a/drivers/block/null_blk/main.c
+++ b/drivers/block/null_blk/main.c
@@ -2372,6 +2372,8 @@ 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);