From: Kai-Heng Feng kai.heng.feng@canonical.com
[ Upstream commit 302a085c20194bfa7df52e0fe684ee0c41da02e6 ]
Sometimes LED won't be turned off by LED_CORE_SUSPENDRESUME flag upon system suspend.
led_set_brightness_nopm() uses schedule_work() to set LED brightness. However, there's no guarantee that the scheduled work gets executed because no one flushes the work.
So flush the scheduled work to make sure LED gets turned off.
Signed-off-by: Kai-Heng Feng kai.heng.feng@canonical.com Acked-by: Jacek Anaszewski jacek.anaszewski@gmail.com Fixes: 81fe8e5b73e3 ("leds: core: Add led_set_brightness_nosleep{nopm} functions") Signed-off-by: Pavel Machek pavel@ucw.cz Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/leds/led-class.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 3c7e3487b373b..4e63dd2bfcf87 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -173,6 +173,7 @@ void led_classdev_suspend(struct led_classdev *led_cdev) { led_cdev->flags |= LED_SUSPENDED; led_set_brightness_nopm(led_cdev, 0); + flush_work(&led_cdev->set_brightness_work); } EXPORT_SYMBOL_GPL(led_classdev_suspend);