diff options
| -rw-r--r-- | drivers/leds/led-triggers.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/leds/led-triggers.c b/drivers/leds/led-triggers.c index 4d1a506a772c..59deadb86335 100644 --- a/drivers/leds/led-triggers.c +++ b/drivers/leds/led-triggers.c @@ -194,6 +194,13 @@ int led_trigger_set(struct led_classdev *led_cdev, struct led_trigger *trig) spin_unlock(&trig->leddev_list_lock); led_cdev->trigger = trig; + /* + * Some activate() calls use led_trigger_event() to initialize + * the brightness of the LED for which the trigger is being set. + * Ensure the led_cdev is visible on trig->led_cdevs for this. + */ + synchronize_rcu(); + ret = 0; if (trig->activate) ret = trig->activate(led_cdev); |