backlight: backlight: Refactor fb_notifier_callback()

Increase readability of fb_notifier_callback() by removing
a few indent levels.

No functional change.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

drivers/video/backlight/backlight.c

@@ -58,20 +58,21 @@ static int fb_notifier_callback(struct notifier_block *self,
 
 	bd = container_of(self, struct backlight_device, fb_notif);
 	mutex_lock(&bd->ops_lock);
-	if (bd->ops)
-		if (!bd->ops->check_fb ||
-		    bd->ops->check_fb(bd, evdata->info)) {
+
+	if (!bd->ops)
+		goto out;
+	if (bd->ops->check_fb && !bd->ops->check_fb(bd, evdata->info))
+		goto out;
+
 	fb_blank = *(int *)evdata->data;
-			if (fb_blank == FB_BLANK_UNBLANK &&
-			    !bd->fb_bl_on[node]) {
+	if (fb_blank == FB_BLANK_UNBLANK && !bd->fb_bl_on[node]) {
 		bd->fb_bl_on[node] = true;
 		if (!bd->use_count++) {
 			bd->props.state &= ~BL_CORE_FBBLANK;
 			bd->props.fb_blank = FB_BLANK_UNBLANK;
 			backlight_update_status(bd);
 		}
-			} else if (fb_blank != FB_BLANK_UNBLANK &&
-				   bd->fb_bl_on[node]) {
+	} else if (fb_blank != FB_BLANK_UNBLANK && bd->fb_bl_on[node]) {
 		bd->fb_bl_on[node] = false;
 		if (!(--bd->use_count)) {
 			bd->props.state |= BL_CORE_FBBLANK;
@@ -79,7 +80,7 @@ static int fb_notifier_callback(struct notifier_block *self,
 			backlight_update_status(bd);
 		}
 	}
-		}
+out:
 	mutex_unlock(&bd->ops_lock);
 	return 0;
 }