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authorGreg Kroah-Hartman <gregkh@suse.de>2008-05-17 04:55:12 +0400
committerGreg Kroah-Hartman <gregkh@suse.de>2008-05-21 00:31:55 +0400
commit0b00fc5851551781e8a30153af2c94cee9fa84af (patch)
tree5a169f44047d2a6c864dfc518e5808bdf5a1ae51 /drivers/leds
parent6c06aec2487f7568cf57471a20f422568f25d551 (diff)
downloadlinux-0b00fc5851551781e8a30153af2c94cee9fa84af.tar.xz
LEDS: fix race in device_create
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>
Diffstat (limited to 'drivers/leds')
-rw-r--r--drivers/leds/led-class.c6
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c
index b3c54be74556..559a40861c39 100644
--- a/drivers/leds/led-class.c
+++ b/drivers/leds/led-class.c
@@ -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)