diff options
| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2018-07-02 22:05:21 +0200 |
|---|---|---|
| committer | Jacek Anaszewski <jacek.anaszewski@gmail.com> | 2018-07-05 23:21:10 +0200 |
| commit | 2282e125a406e09331c5a785e3df29035c99a607 (patch) | |
| tree | b5936ee2bde7c85bf71aaff259026857b2bda6d9 /drivers/leds/trigger/ledtrig-gpio.c | |
| parent | 033692eb3ec8305f6e9998b297aaec6899680637 (diff) | |
leds: triggers: let struct led_trigger::activate() return an error code
Given that activating a trigger can fail, let the callback return an
indication. This prevents to have a trigger active according to the
"trigger" sysfs attribute but not functional.
All users are changed accordingly to return 0 for now. There is no intended
change in behaviour.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Diffstat (limited to 'drivers/leds/trigger/ledtrig-gpio.c')
| -rw-r--r-- | drivers/leds/trigger/ledtrig-gpio.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/leds/trigger/ledtrig-gpio.c b/drivers/leds/trigger/ledtrig-gpio.c index 93906a17a4b6..f5358c40d03f 100644 --- a/drivers/leds/trigger/ledtrig-gpio.c +++ b/drivers/leds/trigger/ledtrig-gpio.c @@ -162,14 +162,14 @@ static ssize_t gpio_trig_gpio_store(struct device *dev, } static DEVICE_ATTR(gpio, 0644, gpio_trig_gpio_show, gpio_trig_gpio_store); -static void gpio_trig_activate(struct led_classdev *led) +static int gpio_trig_activate(struct led_classdev *led) { struct gpio_trig_data *gpio_data; int ret; gpio_data = kzalloc(sizeof(*gpio_data), GFP_KERNEL); if (!gpio_data) - return; + return 0; ret = device_create_file(led->dev, &dev_attr_gpio); if (ret) @@ -187,7 +187,7 @@ static void gpio_trig_activate(struct led_classdev *led) led->trigger_data = gpio_data; led->activated = true; - return; + return 0; err_brightness: device_remove_file(led->dev, &dev_attr_inverted); @@ -197,6 +197,8 @@ err_inverted: err_gpio: kfree(gpio_data); + + return 0; } static void gpio_trig_deactivate(struct led_classdev *led) |