[PATCH v6 7/9] leds: mlxreg: use devm_mutex_init for mutex initializtion

[George Stark]

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 <gnst...@salutedevices.com>
---
 drivers/leds/leds-mlxreg.c | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/drivers/leds/leds-mlxreg.c b/drivers/leds/leds-mlxreg.c
index d8e3d5d8d2d0..b1510cd32e47 100644
--- a/drivers/leds/leds-mlxreg.c
+++ b/drivers/leds/leds-mlxreg.c
@@ -257,6 +257,7 @@ static int mlxreg_led_probe(struct platform_device *pdev)
 {
        struct mlxreg_core_platform_data *led_pdata;
        struct mlxreg_led_priv_data *priv;
+       int err;
 
        led_pdata = dev_get_platdata(&pdev->dev);
        if (!led_pdata) {
@@ -268,26 +269,21 @@ static int mlxreg_led_probe(struct platform_device *pdev)
        if (!priv)
                return -ENOMEM;
 
-       mutex_init(&priv->access_lock);
+       err = devm_mutex_init(&pdev->dev, &priv->access_lock);
+       if (err)
+               return err;
+
        priv->pdev = pdev;
        priv->pdata = led_pdata;
 
        return mlxreg_led_config(priv);
 }
 
-static void mlxreg_led_remove(struct platform_device *pdev)
-{
-       struct mlxreg_led_priv_data *priv = dev_get_drvdata(&pdev->dev);
-
-       mutex_destroy(&priv->access_lock);
-}
-
 static struct platform_driver mlxreg_led_driver = {
        .driver = {
            .name = "leds-mlxreg",
        },
        .probe = mlxreg_led_probe,
-       .remove_new = mlxreg_led_remove,
 };
 
 module_platform_driver(mlxreg_led_driver);
-- 
2.25.1