Pull utrace into release branch

[linux-2.6-omap-h63xx.git] / drivers / video / backlight / backlight.c

diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index 4840fe217e4d30edc8dcc41318720a6e6fede59d..fab0bc874b58d46992b64b90d47be82677b2f543 100644 (file)
--- 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;
                }
        }
@@ -187,6 +191,7 @@ static struct device_attribute bl_device_attributes[] = {
  *   backlight_device class.
  * @name: the name of the new object(must be the same as the name of the
  *   respective framebuffer device).
+ * @parent: a pointer to the parent device
  * @devdata: an optional pointer to be stored for private driver use. The
  *   methods may retrieve it by using bl_get_data(bd).
  * @ops: the backlight operations structure.