leds: disable triggers on brightness set

Disable any active triggers when the brightness attribute is
set to zero.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c
index 13c9026d68af..21dd96909444 100644
--- a/drivers/leds/led-triggers.c
+++ b/drivers/leds/led-triggers.c
@@ -45,9 +45,7 @@ ssize_t led_trigger_store(struct device *dev, struct device_attribute *attr,
                 trigger_name[len - 1] = '\0';
 
         if (!strcmp(trigger_name, "none")) {
-                down_write(&led_cdev->trigger_lock);
-                led_trigger_set(led_cdev, NULL);
-                up_write(&led_cdev->trigger_lock);
+                led_trigger_remove(led_cdev);
                 return count;
         }
 
@@ -139,6 +137,13 @@ void led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trigger)
         led_cdev->trigger = trigger;
 }
 
+void led_trigger_remove(struct led_classdev *led_cdev)
+{
+        down_write(&led_cdev->trigger_lock);
+        led_trigger_set(led_cdev, NULL);
+        up_write(&led_cdev->trigger_lock);
+}
+
 void led_trigger_set_default(struct led_classdev *led_cdev)
 {
         struct led_trigger *trig;
@@ -231,6 +236,7 @@ void led_trigger_unregister_simple(struct led_trigger *trigger)
 
 /* Used by LED Class */
 EXPORT_SYMBOL_GPL(led_trigger_set);
+EXPORT_SYMBOL_GPL(led_trigger_remove);
 EXPORT_SYMBOL_GPL(led_trigger_set_default);
 EXPORT_SYMBOL_GPL(led_trigger_show);
 EXPORT_SYMBOL_GPL(led_trigger_store);