leds: turn the blink_timer off before starting to blink
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>
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index 5c270ae..661b692 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -267,6 +267,8 @@
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;
