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authorJohan Hovold <johan@kernel.org>2014-06-25 10:08:56 -0700
committerBryan Wu <cooloney@gmail.com>2014-06-27 13:44:05 -0700
commit44a1255b03aeedb56cbe7cf27461458bd4513049 (patch)
tree2203921e8ef397ac30e509be9808a762876318ff /drivers/leds
parent660216bf82e0cd65603c0935193c1f7c4aca04fb (diff)
downloadop-kernel-dev-44a1255b03aeedb56cbe7cf27461458bd4513049.zip
op-kernel-dev-44a1255b03aeedb56cbe7cf27461458bd4513049.tar.gz
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>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/leds-lp55xx-common.c22
1 files changed, 3 insertions, 19 deletions
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 @@ static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, lp55xx_show_current,
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 @@ static int lp55xx_init_led(struct lp55xx_led *led,
}
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 @@ static int lp55xx_init_led(struct lp55xx_led *led,
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 @@ void lp55xx_unregister_leds(struct lp55xx_led *led, struct lp55xx_chip *chip)
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);
}
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