leds: core: Add led_set_brightness_nosleep{nopm} functions

This patch adds led_set_brightness_nosleep() and led_set_brightness_nopm()
functions, that guarantee setting LED brightness in a non-blocking way.
The latter is used from pm_ops context and doesn't modify the brightness
cached in the struct led_classdev. Its execution always ends up with
a call to brightness setting op - either directly or through
a set_brightness_work, regardless of LED_SUSPENDED flag state.

The patch also replaces led_set_brightness_async() with
led_set_brightness_nosleep() in all places where the most vital was setting
brightness in a non sleeping way but not necessarily asynchronously, which
is not needed for non-blocking drivers.

Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 7385f98dd54b..83a1dc725864 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -109,7 +109,7 @@ static const struct attribute_group *led_groups[] = {
 void led_classdev_suspend(struct led_classdev *led_cdev)
 {
         led_cdev->flags |= LED_SUSPENDED;
-        led_cdev->brightness_set(led_cdev, 0);
+        led_set_brightness_nopm(led_cdev, 0);
 }
 EXPORT_SYMBOL_GPL(led_classdev_suspend);
 
@@ -119,7 +119,7 @@ EXPORT_SYMBOL_GPL(led_classdev_suspend);
  */
 void led_classdev_resume(struct led_classdev *led_cdev)
 {
-        led_cdev->brightness_set(led_cdev, led_cdev->brightness);
+        led_set_brightness_nopm(led_cdev, led_cdev->brightness);
 
         if (led_cdev->flash_resume)
                 led_cdev->flash_resume(led_cdev);