leds: led-class: Add __devm_led_get() helper

Add a __devm_led_get() helper which registers a passed in led_classdev
with devm for unregistration.

This is a preparation patch for adding a generic (non devicetree specific)
devm_led_get() function.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230120114524.408368-4-hdegoede@redhat.com

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 743d97b082dcb8f17fb32d91a5a87ece1f587bb8..4904d140a560adb1416082198911193526c3fcdd 100644 (file)
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -274,6 +274,22 @@ static void devm_led_release(struct device *dev, void *res)
        led_put(*p);
 }
 
+static struct led_classdev *__devm_led_get(struct device *dev, struct led_classdev *led)
+{
+       struct led_classdev **dr;
+
+       dr = devres_alloc(devm_led_release, sizeof(struct led_classdev *), GFP_KERNEL);
+       if (!dr) {
+               led_put(led);
+               return ERR_PTR(-ENOMEM);
+       }
+
+       *dr = led;
+       devres_add(dev, dr);
+
+       return led;
+}
+
 /**
  * devm_of_led_get - Resource-managed request of a LED device
  * @dev:       LED consumer
@@ -289,7 +305,6 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev,
                                                  int index)
 {
        struct led_classdev *led;
-       struct led_classdev **dr;
 
        if (!dev)
                return ERR_PTR(-EINVAL);
@@ -298,17 +313,7 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev,
        if (IS_ERR(led))
                return led;
 
-       dr = devres_alloc(devm_led_release, sizeof(struct led_classdev *),
-                         GFP_KERNEL);
-       if (!dr) {
-               led_put(led);
-               return ERR_PTR(-ENOMEM);
-       }
-
-       *dr = led;
-       devres_add(dev, dr);
-
-       return led;
+       return __devm_led_get(dev, led);
 }
 EXPORT_SYMBOL_GPL(devm_of_led_get);