diff options
| author | Johan Hovold <johan@kernel.org> | 2014-06-25 10:08:45 -0700 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2014-06-25 15:00:55 -0700 |
| commit | 74c850394394efc0905c22ab9686e8d20e3921eb (patch) | |
| tree | 53fdcc6e27c3ff5c459df368608cce191472030c /drivers/leds | |
| parent | d0d480cce8f522b37c2c1de38230fc9ad15fa506 (diff) | |
| download | lwn-74c850394394efc0905c22ab9686e8d20e3921eb.tar.gz lwn-74c850394394efc0905c22ab9686e8d20e3921eb.zip | |
leds: lm3550: 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')
| -rw-r--r-- | drivers/leds/leds-lm3530.c | 20 |
1 files changed, 7 insertions, 13 deletions
diff --git a/drivers/leds/leds-lm3530.c b/drivers/leds/leds-lm3530.c index 652368c2ea9a..91325de3cd33 100644 --- a/drivers/leds/leds-lm3530.c +++ b/drivers/leds/leds-lm3530.c @@ -400,6 +400,12 @@ static ssize_t lm3530_mode_set(struct device *dev, struct device_attribute } static DEVICE_ATTR(mode, 0644, lm3530_mode_get, lm3530_mode_set); +static struct attribute *lm3530_attrs[] = { + &dev_attr_mode.attr, + NULL +}; +ATTRIBUTE_GROUPS(lm3530); + static int lm3530_probe(struct i2c_client *client, const struct i2c_device_id *id) { @@ -436,6 +442,7 @@ static int lm3530_probe(struct i2c_client *client, drvdata->led_dev.name = LM3530_LED_DEV; drvdata->led_dev.brightness_set = lm3530_brightness_set; drvdata->led_dev.max_brightness = MAX_BRIGHTNESS; + drvdata->led_dev.groups = lm3530_groups; i2c_set_clientdata(client, drvdata); @@ -461,26 +468,13 @@ static int lm3530_probe(struct i2c_client *client, return err; } - err = device_create_file(drvdata->led_dev.dev, &dev_attr_mode); - if (err < 0) { - dev_err(&client->dev, "File device creation failed: %d\n", err); - err = -ENODEV; - goto err_create_file; - } - return 0; - -err_create_file: - led_classdev_unregister(&drvdata->led_dev); - return err; } static int lm3530_remove(struct i2c_client *client) { struct lm3530_data *drvdata = i2c_get_clientdata(client); - device_remove_file(drvdata->led_dev.dev, &dev_attr_mode); - lm3530_led_disable(drvdata); led_classdev_unregister(&drvdata->led_dev); return 0; |