joel16/android_kernel_sony_msm8994
1
0
Fork 0
mirror of https://github.com/joel16/android_kernel_sony_msm8994.git synced 2024-11-27 22:21:14 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

LEDS: fix race in device_create

Browse Source 
There is a race from when a device is created with device_create() and
then the drvdata is set with a call to dev_set_drvdata() in which a
sysfs file could be open, yet the drvdata will be NULL, causing all
sorts of bad things to happen.

This patch fixes the problem by using the new function,
device_create_drvdata().

Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2008-05-16 17:55:12 -07:00
parent 6c06aec248
commit 0b00fc5851
1 changed files with 2 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/leds/led-class.c
View File

@ -103,13 +103,11 @@ int led_classdev_register(struct device *parent, struct led_classdev *led_cdev)
{
int rc;
led_cdev->dev = device_create(leds_class, parent, 0, "%s",
led_cdev->name);
led_cdev->dev = device_create_drvdata(leds_class, parent, 0, led_cdev,
"%s", led_cdev->name);
if (IS_ERR(led_cdev->dev))
return PTR_ERR(led_cdev->dev);
dev_set_drvdata(led_cdev->dev, led_cdev);
/* register the attributes */
rc = device_create_file(led_cdev->dev, &dev_attr_brightness);
if (rc)