ar9170: fix LED power state handling

This patch fixes a minor visual bug in the led code, which
left the LED in the wrong power state when it was toggled
in a _unexpected_ way (e.g: enabling the LED twice).

Signed-off-by: Christian Lamparter <chunkeey@web.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 6 insertions, 2 deletions

diff --git a/drivers/net/wireless/ath/ar9170/ar9170.h b/drivers/net/wireless/ath/ar9170/ar9170.h
index 1247dcb9081a..396b24016f5e 100644
--- a/drivers/net/wireless/ath/ar9170/ar9170.h
+++ b/drivers/net/wireless/ath/ar9170/ar9170.h
@@ -91,6 +91,7 @@ struct ar9170_led {
         struct led_classdev l;
         char name[32];
         unsigned int toggled;
+        bool last_state;
         bool registered;
 };
 
diff --git a/drivers/net/wireless/ath/ar9170/led.c b/drivers/net/wireless/ath/ar9170/led.c
index 341cead7f606..3c8a5728920d 100644
--- a/drivers/net/wireless/ath/ar9170/led.c
+++ b/drivers/net/wireless/ath/ar9170/led.c
@@ -101,9 +101,12 @@ static void ar9170_led_brightness_set(struct led_classdev *led,
         struct ar9170_led *arl = container_of(led, struct ar9170_led, l);
         struct ar9170 *ar = arl->ar;
 
-        arl->toggled++;
+        if (arl->last_state != !!brightness) {
+                arl->toggled++;
+                arl->last_state = !!brightness;
+        }
 
-        if (likely(IS_ACCEPTING_CMD(ar) && brightness))
+        if (likely(IS_ACCEPTING_CMD(ar) && arl->toggled))
                 queue_delayed_work(ar->hw->workqueue, &ar->led_work, HZ/10);
 }