Patch "leds: an30259a: Use devm_mutex_init() for mutex initialization" has been added to the 6.9-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    leds: an30259a: Use devm_mutex_init() for mutex initialization

to the 6.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     leds-an30259a-use-devm_mutex_init-for-mutex-initiali.patch
and it can be found in the queue-6.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit de7d6677d6f2a268dd8c42428315070a32bf0fc2
Author: George Stark <gnstark@xxxxxxxxxxxxxxxxx>
Date:   Thu Apr 11 19:10:32 2024 +0300

    leds: an30259a: Use devm_mutex_init() for mutex initialization
    
    [ Upstream commit c382e2e3eccb6b7ca8c7aff5092c1668428e7de6 ]
    
    In this driver LEDs are registered using devm_led_classdev_register()
    so they are automatically unregistered after module's remove() is done.
    led_classdev_unregister() calls module's led_set_brightness() to turn off
    the LEDs and that callback uses mutex which was destroyed already
    in module's remove() so use devm API instead.
    
    Signed-off-by: George Stark <gnstark@xxxxxxxxxxxxxxxxx>
    Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
    Link: https://lore.kernel.org/r/20240411161032.609544-9-gnstark@xxxxxxxxxxxxxxxxx
    Signed-off-by: Lee Jones <lee@xxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/leds/leds-an30259a.c b/drivers/leds/leds-an30259a.c
index 0216afed3b6e7..decfca447d8a7 100644
--- a/drivers/leds/leds-an30259a.c
+++ b/drivers/leds/leds-an30259a.c
@@ -283,7 +283,10 @@ static int an30259a_probe(struct i2c_client *client)
 	if (err < 0)
 		return err;
 
-	mutex_init(&chip->mutex);
+	err = devm_mutex_init(&client->dev, &chip->mutex);
+	if (err)
+		return err;
+
 	chip->client = client;
 	i2c_set_clientdata(client, chip);
 
@@ -317,17 +320,9 @@ static int an30259a_probe(struct i2c_client *client)
 	return 0;
 
 exit:
-	mutex_destroy(&chip->mutex);
 	return err;
 }
 
-static void an30259a_remove(struct i2c_client *client)
-{
-	struct an30259a *chip = i2c_get_clientdata(client);
-
-	mutex_destroy(&chip->mutex);
-}
-
 static const struct of_device_id an30259a_match_table[] = {
 	{ .compatible = "panasonic,an30259a", },
 	{ /* sentinel */ },
@@ -347,7 +342,6 @@ static struct i2c_driver an30259a_driver = {
 		.of_match_table = an30259a_match_table,
 	},
 	.probe = an30259a_probe,
-	.remove = an30259a_remove,
 	.id_table = an30259a_id,
 };