[PATCH] counter: interrupt-cnt: use devm_mutex_init()

[Stepan Ionichev]

interrupt_cnt_probe() calls mutex_init() but neither this driver
nor the counter core issues a matching mutex_destroy() on unbind,
so the lock debug state is leaked.

Switch to devm_mutex_init() so the mutex is torn down in the same
devm scope it was set up in.

Signed-off-by: Stepan Ionichev <sozdayvek@xxxxxxxxx>
---
 drivers/counter/interrupt-cnt.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/counter/interrupt-cnt.c b/drivers/counter/interrupt-cnt.c
index e6100b5fb..cd475382a 100644
--- a/drivers/counter/interrupt-cnt.c
+++ b/drivers/counter/interrupt-cnt.c
@@ -233,7 +233,9 @@ static int interrupt_cnt_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	mutex_init(&priv->lock);
+	ret = devm_mutex_init(dev, &priv->lock);
+	if (ret)
+		return ret;
 
 	ret = devm_counter_add(dev, counter);
 	if (ret < 0)
-- 
2.43.0