[PATCH] platform/x86: dell-wmi-ddv: switch sensor mutex to devm_mutex_init()

[PATCH] platform/x86: dell-wmi-ddv: switch sensor mutex to devm_mutex_init()

[chitranshmandhaniya]

From: Chitransh Mandhaniya <Chitransh_Mandhaniya@dell.com>

Replace mutex_init() with devm_mutex_init() for the sensor caching
mutex so the mutex lifecycle is managed by devres. This allows
removing the manual mutex_destroy() call from the
dell_wmi_ddv_hwmon_cache_destroy() cleanup callback.

The translation_cache_lock in the same driver already uses
devm_mutex_init(); this brings the sensor lock in line.

Signed-off-by: Chitransh Mandhaniya <Chitransh_Mandhaniya@dell.com>
---
 drivers/platform/x86/dell/dell-wmi-ddv.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/dell/dell-wmi-ddv.c b/drivers/platform/x86/dell/dell-wmi-ddv.c
index f8903ced461b..c7f3d07abbc7 100644
--- a/drivers/platform/x86/dell/dell-wmi-ddv.c
+++ b/drivers/platform/x86/dell/dell-wmi-ddv.c
@@ -548,7 +548,6 @@ static void dell_wmi_ddv_hwmon_cache_destroy(void *data)
 	struct dell_wmi_ddv_sensors *sensors = data;
 
 	sensors->active = false;
-	mutex_destroy(&sensors->lock);
 	kfree(sensors->buffer);
 }
 
@@ -566,7 +565,9 @@ static struct hwmon_channel_info *dell_wmi_ddv_channel_init(struct wmi_device *w
 	if (ret < 0)
 		return ERR_PTR(ret);
 
-	mutex_init(&sensors->lock);
+	ret = devm_mutex_init(&wdev->dev, &sensors->lock);
+	if (ret < 0)
+		return ERR_PTR(ret);
 	sensors->active = true;
 
 	ret = devm_add_action_or_reset(&wdev->dev, dell_wmi_ddv_hwmon_cache_destroy, sensors);
-- 
2.43.0