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>
---
drivers/leds/leds-mlxreg.c | 17 ++++++-----------
1 file changed, 6 insertions(+), 11 deletions(-)
diff --git a/drivers/leds/leds-mlxreg.c b/drivers/leds/leds-mlxreg.c
index b7855c93bd72..64a78eff05c7 100644
--- a/drivers/leds/leds-mlxreg.c
+++ b/drivers/leds/leds-mlxreg.c
@@ -5,6 +5,7 @@
#include <linux/bitops.h>
#include <linux/device.h>
+#include <linux/devm-helpers.h>
#include <linux/io.h>
#include <linux/leds.h>
#include <linux/module.h>
@@ -258,6 +259,7 @@ 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) {
@@ -269,28 +271,21 @@ 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 int mlxreg_led_remove(struct platform_device *pdev)
-{
- struct mlxreg_led_priv_data *priv = dev_get_drvdata(&pdev->dev);
-
- mutex_destroy(&priv->access_lock);
-
- return 0;
-}
-
static struct platform_driver mlxreg_led_driver = {
.driver = {
.name = "leds-mlxreg",
},
.probe = mlxreg_led_probe,
- .remove = mlxreg_led_remove,
};
module_platform_driver(mlxreg_led_driver);
--
2.25.1
