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authorAntonio Ospite <ospite@studenti.unina.it>2011-10-31 17:12:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-10-31 17:30:55 -0700
commit6123b0e274503a0d3588e84fbe07c9aa01bfaf5d (patch)
treec4e47bb84136b2586c17be1a541f49898d2c9fcc /drivers/leds
parentdabc69c24271bd6ac126e3dda4f2d72234da81df (diff)
leds: save the delay values after a successful call to blink_set()
When calling the hardware blinking function implemented by blink_set(), the delay_on and delay_off values are not preserved across calls. Fix that and make the "timer" trigger work as expected when hardware blinking is available. BEFORE the fix: $ cd /sys/class/leds/someled $ echo timer > trigger $ cat delay_on delay_off 0 0 $ echo 100 > delay_on $ cat delay_on delay_off 0 0 $ echo 100 > delay_off $ cat delay_on delay_off 0 0 AFTER the fix: $ cd /sys/class/leds/someled $ echo timer > trigger $ cat delay_on delay_off 0 0 $ echo 100 > delay_on $ cat delay_on delay_off 100 0 $ echo 100 > delay_off $ cat delay_on delay_off 100 100 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>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/led-class.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index dc3d3d83191a..5c270aecedc5 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -268,8 +268,11 @@ void led_blink_set(struct led_classdev *led_cdev,
unsigned long *delay_off)
{
if (led_cdev->blink_set &&
- !led_cdev->blink_set(led_cdev, delay_on, delay_off))
+ !led_cdev->blink_set(led_cdev, delay_on, delay_off)) {
+ led_cdev->blink_delay_on = *delay_on;
+ led_cdev->blink_delay_off = *delay_off;
return;
+ }
/* blink with 1 Hz as default if nothing specified */
if (!*delay_on && !*delay_off)