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leds: turn the blink_timer off before starting to blink

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Depending on the implementation of the hardware blinking function in
blink_set(), the led can support hardware blinking for some values of
delay_on and delay_off and fall-back to software blinking for some other
values.

Turning off the blink_timer unconditionally before starting to blink
make sure that a sequence like:

  OFF
  hardware blinking
  software blinking
  hardware blinking

does not leave the software blinking timer active.

Signed-off-by: Antonio Ospite <ospite@studenti.unina.it>
Reviewed-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: <stable@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Antonio Ospite 2011-10-31 17:12:22 -07:00 committed by Linus Torvalds
parent 6123b0e274
commit 488bc35bf4
1 changed files with 2 additions and 0 deletions
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2
drivers/leds/led-class.c
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@ -267,6 +267,8 @@ void led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_on,
unsigned long *delay_off)
{
del_timer_sync(&led_cdev->blink_timer);
if (led_cdev->blink_set &&
!led_cdev->blink_set(led_cdev, delay_on, delay_off)) {
led_cdev->blink_delay_on = *delay_on;