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authorJohan Hovold <johan@kernel.org>2014-06-25 10:08:46 -0700
committerBryan Wu <cooloney@gmail.com>2014-06-25 15:02:31 -0700
commit9db9386016c6cfc6a6af3bacc7043cab8ff04ecf (patch)
tree77f0ca4c8fdd65069d4fb48ed26aeae4f7ea344d /drivers/leds
parent74c850394394efc0905c22ab9686e8d20e3921eb (diff)
leds: lm3533: fix attribute-creation race
Use the attribute groups of the led-class to create the 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-lm3533.c20
1 files changed, 8 insertions, 12 deletions
diff --git a/drivers/leds/leds-lm3533.c b/drivers/leds/leds-lm3533.c
index e2c642c1169b..cbf61a40137d 100644
--- a/drivers/leds/leds-lm3533.c
+++ b/drivers/leds/leds-lm3533.c
@@ -645,6 +645,11 @@ static struct attribute_group lm3533_led_attribute_group = {
.attrs = lm3533_led_attributes
};
+static const struct attribute_group *lm3533_led_attribute_groups[] = {
+ &lm3533_led_attribute_group,
+ NULL
+};
+
static int lm3533_led_setup(struct lm3533_led *led,
struct lm3533_led_platform_data *pdata)
{
@@ -692,6 +697,7 @@ static int lm3533_led_probe(struct platform_device *pdev)
led->cdev.brightness_get = lm3533_led_get;
led->cdev.blink_set = lm3533_led_blink_set;
led->cdev.brightness = LED_OFF;
+ led->cdev.groups = lm3533_led_attribute_groups,
led->id = pdev->id;
mutex_init(&led->mutex);
@@ -715,25 +721,16 @@ static int lm3533_led_probe(struct platform_device *pdev)
led->cb.dev = led->cdev.dev;
- ret = sysfs_create_group(&led->cdev.dev->kobj,
- &lm3533_led_attribute_group);
- if (ret < 0) {
- dev_err(&pdev->dev, "failed to create sysfs attributes\n");
- goto err_unregister;
- }
-
ret = lm3533_led_setup(led, pdata);
if (ret)
- goto err_sysfs_remove;
+ goto err_unregister;
ret = lm3533_ctrlbank_enable(&led->cb);
if (ret)
- goto err_sysfs_remove;
+ goto err_unregister;
return 0;
-err_sysfs_remove:
- sysfs_remove_group(&led->cdev.dev->kobj, &lm3533_led_attribute_group);
err_unregister:
led_classdev_unregister(&led->cdev);
flush_work(&led->work);
@@ -748,7 +745,6 @@ static int lm3533_led_remove(struct platform_device *pdev)
dev_dbg(&pdev->dev, "%s\n", __func__);
lm3533_ctrlbank_disable(&led->cb);
- sysfs_remove_group(&led->cdev.dev->kobj, &lm3533_led_attribute_group);
led_classdev_unregister(&led->cdev);
flush_work(&led->work);