From 9db9386016c6cfc6a6af3bacc7043cab8ff04ecf Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Wed, 25 Jun 2014 10:08:46 -0700 Subject: [PATCH] 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 Signed-off-by: Bryan Wu --- drivers/leds/leds-lm3533.c | 20 ++++++++------------ 1 file 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); -- 2.20.1