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leds: change existing triggers to use activated flag 

Change existing triggers backlight, gpio, and heartbeat to use the new
->activated flag to set activate successful status in their activate
routines and check it in their deactivate routines to do cleanup.

Signed-off-by: Shuah Khan <shuahkhan@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Bryan Wu <bryan.wu@canonical.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Shuah Khan 2012-05-29 15:07:28 -07:00 committed by Linus Torvalds
parent b00961824a
commit 03c091e5b7
3 changed files with 9 additions and 3 deletions
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4
drivers/leds/ledtrig-backlight.c
View File

@ -120,6 +120,7 @@ static void bl_trig_activate(struct led_classdev *led)
ret = fb_register_client(&n->notifier);
if (ret)
dev_err(led->dev, "unable to register backlight trigger\n");
led->activated = true;
return;
@ -133,10 +134,11 @@ static void bl_trig_deactivate(struct led_classdev *led)
struct bl_trig_notifier *n =
(struct bl_trig_notifier *) led->trigger_data;
if (n) {
if (led->activated) {
device_remove_file(led->dev, &dev_attr_inverted);
fb_unregister_client(&n->notifier);
kfree(n);
led->activated = false;
}
}

4
drivers/leds/ledtrig-gpio.c
View File

@ -200,6 +200,7 @@ static void gpio_trig_activate(struct led_classdev *led)
gpio_data->led = led;
led->trigger_data = gpio_data;
INIT_WORK(&gpio_data->work, gpio_trig_work);
led->activated = true;
return;
@ -217,7 +218,7 @@ static void gpio_trig_deactivate(struct led_classdev *led)
{
struct gpio_trig_data *gpio_data = led->trigger_data;
if (gpio_data) {
if (led->activated) {
device_remove_file(led->dev, &dev_attr_gpio);
device_remove_file(led->dev, &dev_attr_inverted);
device_remove_file(led->dev, &dev_attr_desired_brightness);
@ -225,6 +226,7 @@ static void gpio_trig_deactivate(struct led_classdev *led)
if (gpio_data->gpio != 0)
free_irq(gpio_to_irq(gpio_data->gpio), led);
kfree(gpio_data);
led->activated = false;
}
}

4
drivers/leds/ledtrig-heartbeat.c
View File

@ -83,15 +83,17 @@ static void heartbeat_trig_activate(struct led_classdev *led_cdev)
led_heartbeat_function, (unsigned long) led_cdev);
heartbeat_data->phase = 0;
led_heartbeat_function(heartbeat_data->timer.data);
led_cdev->activated = true;
}
static void heartbeat_trig_deactivate(struct led_classdev *led_cdev)
{
struct heartbeat_trig_data *heartbeat_data = led_cdev->trigger_data;
if (heartbeat_data) {
if (led_cdev->activated) {
del_timer_sync(&heartbeat_data->timer);
kfree(heartbeat_data);
led_cdev->activated = false;
}
}