diff options
| -rw-r--r-- | drivers/video/backlight/backlight.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c index 4840fe217e4..39394757679 100644 --- a/drivers/video/backlight/backlight.c +++ b/drivers/video/backlight/backlight.c @@ -94,8 +94,10 @@ static ssize_t backlight_store_power(struct device *dev, mutex_lock(&bd->ops_lock); if (bd->ops) { pr_debug("backlight: set power to %d\n", power); - bd->props.power = power; - backlight_update_status(bd); + if (bd->props.power != power) { + bd->props.power = power; + backlight_update_status(bd); + } rc = count; } mutex_unlock(&bd->ops_lock); @@ -132,8 +134,10 @@ static ssize_t backlight_store_brightness(struct device *dev, else { pr_debug("backlight: set brightness to %d\n", brightness); - bd->props.brightness = brightness; - backlight_update_status(bd); + if (bd->props.brightness != brightness) { + bd->props.brightness = brightness; + backlight_update_status(bd); + } rc = count; } } |