From: Johan Hovold Date: Wed, 25 Jun 2014 17:08:49 +0000 (-0700) Subject: leds: max8997: fix attribute-creation race X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=35c164998eede9e3d49f51541fcf2e639670fe72;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git leds: max8997: fix attribute-creation race Use the attribute groups of the led-class to create the mode attribute during probe in order to avoid racing with userspace. Signed-off-by: Johan Hovold Signed-off-by: Bryan Wu --- diff --git a/drivers/leds/leds-max8997.c b/drivers/leds/leds-max8997.c index f449a8bdddc7..607bc2755aba 100644 --- a/drivers/leds/leds-max8997.c +++ b/drivers/leds/leds-max8997.c @@ -229,6 +229,12 @@ static ssize_t max8997_led_store_mode(struct device *dev, static DEVICE_ATTR(mode, 0644, max8997_led_show_mode, max8997_led_store_mode); +static struct attribute *max8997_attrs[] = { + &dev_attr_mode.attr, + NULL +}; +ATTRIBUTE_GROUPS(max8997); + static int max8997_led_probe(struct platform_device *pdev) { struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent); @@ -253,6 +259,7 @@ static int max8997_led_probe(struct platform_device *pdev) led->cdev.brightness_set = max8997_led_brightness_set; led->cdev.flags |= LED_CORE_SUSPENDRESUME; led->cdev.brightness = 0; + led->cdev.groups = max8997_groups; led->iodev = iodev; /* initialize mode and brightness according to platform_data */ @@ -281,14 +288,6 @@ static int max8997_led_probe(struct platform_device *pdev) if (ret < 0) return ret; - ret = device_create_file(led->cdev.dev, &dev_attr_mode); - if (ret != 0) { - dev_err(&pdev->dev, - "failed to create file: %d\n", ret); - led_classdev_unregister(&led->cdev); - return ret; - } - return 0; } @@ -296,7 +295,6 @@ static int max8997_led_remove(struct platform_device *pdev) { struct max8997_led *led = platform_get_drvdata(pdev); - device_remove_file(led->cdev.dev, &dev_attr_mode); led_classdev_unregister(&led->cdev); return 0;