struct device_attribute *attr, const char *buf, size_t size)
{
struct led_classdev *led_cdev = dev_get_drvdata(dev);
+ unsigned long state;
ssize_t ret = -EINVAL;
- char *after;
- unsigned long state = simple_strtoul(buf, &after, 10);
- size_t count = after - buf;
- if (isspace(*after))
- count++;
+ ret = kstrtoul(buf, 10, &state);
+ if (ret)
+ return ret;
- if (count == size) {
- ret = count;
+ if (state == LED_OFF)
+ led_trigger_remove(led_cdev);
+ led_set_brightness(led_cdev, state);
- if (state == LED_OFF)
- led_trigger_remove(led_cdev);
- led_set_brightness(led_cdev, state);
- }
-
- return ret;
+ return size;
}
static ssize_t led_max_brightness_show(struct device *dev,