diff options
| author | Johan Hovold <johan@kernel.org> | 2014-06-25 21:08:51 +0400 |
|---|---|---|
| committer | Bryan Wu <cooloney@gmail.com> | 2014-06-26 02:32:11 +0400 |
| commit | 475f85482663985550e589496bc3c1e09521838a (patch) | |
| tree | ab5967b79cc723ec2482531f5e621fa3c0f86a2e /drivers/leds/leds-ns2.c | |
| parent | 588a6a99286ae30afb1339d8bc2163517b1b7dd1 (diff) | |
| download | linux-475f85482663985550e589496bc3c1e09521838a.tar.xz | |
leds: ns2: fix attribute-creation race
Use the attribute groups of the led-class to create the sata 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-ns2.c')
| -rw-r--r-- | drivers/leds/leds-ns2.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/drivers/leds/leds-ns2.c b/drivers/leds/leds-ns2.c index efa625883c83..231993d1fe21 100644 --- a/drivers/leds/leds-ns2.c +++ b/drivers/leds/leds-ns2.c @@ -185,6 +185,12 @@ static ssize_t ns2_led_sata_show(struct device *dev, static DEVICE_ATTR(sata, 0644, ns2_led_sata_show, ns2_led_sata_store); +static struct attribute *ns2_led_attrs[] = { + &dev_attr_sata.attr, + NULL +}; +ATTRIBUTE_GROUPS(ns2_led); + static int create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat, const struct ns2_led *template) @@ -219,6 +225,7 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat, led_dat->cdev.blink_set = NULL; led_dat->cdev.brightness_set = ns2_led_set; led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; + led_dat->cdev.groups = ns2_led_groups; led_dat->cmd = template->cmd; led_dat->slow = template->slow; @@ -235,20 +242,11 @@ create_ns2_led(struct platform_device *pdev, struct ns2_led_data *led_dat, if (ret < 0) return ret; - ret = device_create_file(led_dat->cdev.dev, &dev_attr_sata); - if (ret < 0) - goto err_free_cdev; - return 0; - -err_free_cdev: - led_classdev_unregister(&led_dat->cdev); - return ret; } static void delete_ns2_led(struct ns2_led_data *led_dat) { - device_remove_file(led_dat->cdev.dev, &dev_attr_sata); led_classdev_unregister(&led_dat->cdev); } |