--- zzzz-none-000/linux-3.10.107/drivers/leds/trigger/ledtrig-backlight.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/leds/trigger/ledtrig-backlight.c	2021-02-04 17:41:59.000000000 +0000
@@ -36,26 +36,28 @@
 					struct bl_trig_notifier, notifier);
 	struct led_classdev *led = n->led;
 	struct fb_event *fb_event = data;
-	int *blank = fb_event->data;
-	int new_status = *blank ? BLANK : UNBLANK;
+	int *blank;
+	int new_status;
 
-	switch (event) {
-	case FB_EVENT_BLANK:
-		if (new_status == n->old_status)
-			break;
-
-		if ((n->old_status == UNBLANK) ^ n->invert) {
-			n->brightness = led->brightness;
-			__led_set_brightness(led, LED_OFF);
-		} else {
-			__led_set_brightness(led, n->brightness);
-		}
-
-		n->old_status = new_status;
-
-		break;
+	/* If we aren't interested in this event, skip it immediately ... */
+	if (event != FB_EVENT_BLANK)
+		return 0;
+
+	blank = fb_event->data;
+	new_status = *blank ? BLANK : UNBLANK;
+
+	if (new_status == n->old_status)
+		return 0;
+
+	if ((n->old_status == UNBLANK) ^ n->invert) {
+		n->brightness = led->brightness;
+		led_set_brightness_async(led, LED_OFF);
+	} else {
+		led_set_brightness_async(led, n->brightness);
 	}
 
+	n->old_status = new_status;
+
 	return 0;
 }
 
@@ -87,9 +89,9 @@
 
 	/* After inverting, we need to update the LED. */
 	if ((n->old_status == BLANK) ^ n->invert)
-		__led_set_brightness(led, LED_OFF);
+		led_set_brightness_async(led, LED_OFF);
 	else
-		__led_set_brightness(led, n->brightness);
+		led_set_brightness_async(led, n->brightness);
 
 	return num;
 }