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| author | Johan Hovold <johan@kernel.org> | 2014-06-25 21:08:49 +0400 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2014-06-26 02:24:03 +0400 |
| commit | 35c164998eede9e3d49f51541fcf2e639670fe72 (patch) | |
| tree | ae03d1ebc5c9f557f6f30411d8dc55d9fdf4e9ac /drivers/leds/leds-max8997.c | |
| parent | fe29a3b0bb375aeac1c995904369553e62d03d75 (diff) | |
| download | linux-35c164998eede9e3d49f51541fcf2e639670fe72.tar.xz | |
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 <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Diffstat (limited to 'drivers/leds/leds-max8997.c')
| -rw-r--r-- | drivers/leds/leds-max8997.c | 16 |
1 files changed, 7 insertions, 9 deletions
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; |