leds: lp55xx-common: fix attribute-creation race
Use the attribute groups of the led-class to create the LED attributes
during probe in order to avoid racing with userspace.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
diff --git a/drivers/leds/leds-lp55xx-common.c b/drivers/leds/leds-lp55xx-common.c
index 3fbfb31..77c26bc 100644
--- a/drivers/leds/leds-lp55xx-common.c
+++ b/drivers/leds/leds-lp55xx-common.c
@@ -127,15 +127,12 @@
lp55xx_store_current);
static DEVICE_ATTR(max_current, S_IRUGO , lp55xx_show_max_current, NULL);
-static struct attribute *lp55xx_led_attributes[] = {
+static struct attribute *lp55xx_led_attrs[] = {
&dev_attr_led_current.attr,
&dev_attr_max_current.attr,
NULL,
};
-
-static struct attribute_group lp55xx_led_attr_group = {
- .attrs = lp55xx_led_attributes
-};
+ATTRIBUTE_GROUPS(lp55xx_led);
static void lp55xx_set_brightness(struct led_classdev *cdev,
enum led_brightness brightness)
@@ -176,6 +173,7 @@
}
led->cdev.brightness_set = lp55xx_set_brightness;
+ led->cdev.groups = lp55xx_led_groups;
if (pdata->led_config[chan].name) {
led->cdev.name = pdata->led_config[chan].name;
@@ -185,24 +183,12 @@
led->cdev.name = name;
}
- /*
- * register led class device for each channel and
- * add device attributes
- */
-
ret = led_classdev_register(dev, &led->cdev);
if (ret) {
dev_err(dev, "led register err: %d\n", ret);
return ret;
}
- ret = sysfs_create_group(&led->cdev.dev->kobj, &lp55xx_led_attr_group);
- if (ret) {
- dev_err(dev, "led sysfs err: %d\n", ret);
- led_classdev_unregister(&led->cdev);
- return ret;
- }
-
return 0;
}
@@ -520,8 +506,6 @@
for (i = 0; i < chip->num_leds; i++) {
each = led + i;
- sysfs_remove_group(&each->cdev.dev->kobj,
- &lp55xx_led_attr_group);
led_classdev_unregister(&each->cdev);
flush_work(&each->brightness_work);
}