1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/video/backlight/lcd.c b/drivers/video/backlight/lcd.c
index b6449470106c..0bb13df0fa89 100644
--- a/drivers/video/backlight/lcd.c
+++ b/drivers/video/backlight/lcd.c
@@ -40,6 +40,8 @@ static int fb_notifier_callback(struct notifier_block *self,
         if (!ld->ops)
                 return 0;
 
+        if (!lock_fb_info(evdata->info))
+                return -ENODEV;
         mutex_lock(&ld->ops_lock);
         if (!ld->ops->check_fb || ld->ops->check_fb(ld, evdata->info)) {
                 if (event == FB_EVENT_BLANK) {
@@ -51,6 +53,7 @@ static int fb_notifier_callback(struct notifier_block *self,
                 }
         }
         mutex_unlock(&ld->ops_lock);
+        unlock_fb_info(evdata->info);
         return 0;
 }