leds: spi-byte: Use devm_mutex_init() for mutex initialization

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: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20240606173037.3091598-6-andriy.shevchenko@linux.intel.com
Signed-off-by: Lee Jones <lee@kernel.org>

diff --git a/drivers/leds/leds-spi-byte.c b/drivers/leds/leds-spi-byte.c
index e63958e584c2c2358dea3154d438b4e025f849d0..985bbbed251b64efa424247deabe66022cee61cc 100644 (file)
--- a/drivers/leds/leds-spi-byte.c
+++ b/drivers/leds/leds-spi-byte.c
@@ -31,9 +31,9 @@
 #include <linux/leds.h>
 #include <linux/mod_devicetable.h>
 #include <linux/module.h>
+#include <linux/mutex.h>
 #include <linux/property.h>
 #include <linux/spi/spi.h>
-#include <linux/mutex.h>
 #include <uapi/linux/uleds.h>
 
 struct spi_byte_chipdef {
@@ -97,8 +97,11 @@ static int spi_byte_probe(struct spi_device *spi)
        if (!led)
                return -ENOMEM;
 
+       ret = devm_mutex_init(dev, &led->mutex);
+       if (ret)
+               return ret;
+
        led->spi = spi;
-       mutex_init(&led->mutex);
        led->cdef = device_get_match_data(dev);
        led->ldev.brightness = LED_OFF;
        led->ldev.max_brightness = led->cdef->max_value - led->cdef->off_value;
@@ -116,33 +119,16 @@ static int spi_byte_probe(struct spi_device *spi)
        init_data.devicename = "leds-spi-byte";
        init_data.default_label = ":";
 
-       ret = devm_led_classdev_register_ext(dev, &led->ldev, &init_data);
-       if (ret) {
-               mutex_destroy(&led->mutex);
-               return ret;
-       }
-
-       spi_set_drvdata(spi, led);
-
-       return 0;
-}
-
-static void spi_byte_remove(struct spi_device *spi)
-{
-       struct spi_byte_led     *led = spi_get_drvdata(spi);
-
-       mutex_destroy(&led->mutex);
+       return devm_led_classdev_register_ext(dev, &led->ldev, &init_data);
 }
 
 static struct spi_driver spi_byte_driver = {
        .probe          = spi_byte_probe,
-       .remove         = spi_byte_remove,
        .driver = {
                .name           = KBUILD_MODNAME,
                .of_match_table = spi_byte_dt_ids,
        },
 };
-
 module_spi_driver(spi_byte_driver);
 
 MODULE_AUTHOR("Christian Mauderer <oss@c-mauderer.de>");