From: Axel Lin Date: Mon, 8 Aug 2011 09:17:18 +0000 (+0800) Subject: platform-drivers-x86: asus-laptop: fix wrong test for successful registered led_classdev X-Git-Tag: v3.2-rc1~111^2~24 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8fcf71aa0032acbd30b3222f9cb238919ab3b984;p=profile%2Fivi%2Fkernel-x86-ivi.git platform-drivers-x86: asus-laptop: fix wrong test for successful registered led_classdev device_create returns &struct device pointer on success, or ERR_PTR() on error. Thus if led_classdev_register fails, led_cdev->dev is always not NULL. Thus to unregister a successful registered led_classdev, we should check IS_ERR_OR_NULL macro for led_cdev->dev instead of checking if led_cdev->dev is NULL or not. we use IS_ERR_OR_NULL instead of IS_ERR because if we havn't call led_classdev_register, the led_cdev->dev is NULL. Signed-off-by: Axel Lin Acked-by: Corentin Chary Signed-off-by: Matthew Garrett --- diff --git a/drivers/platform/x86/asus-laptop.c b/drivers/platform/x86/asus-laptop.c index afed9ff..10b0a86 100644 --- a/drivers/platform/x86/asus-laptop.c +++ b/drivers/platform/x86/asus-laptop.c @@ -459,17 +459,17 @@ static enum led_brightness asus_kled_cdev_get(struct led_classdev *led_cdev) static void asus_led_exit(struct asus_laptop *asus) { - if (asus->mled.led.dev) + if (!IS_ERR_OR_NULL(asus->mled.led.dev)) led_classdev_unregister(&asus->mled.led); - if (asus->tled.led.dev) + if (!IS_ERR_OR_NULL(asus->tled.led.dev)) led_classdev_unregister(&asus->tled.led); - if (asus->pled.led.dev) + if (!IS_ERR_OR_NULL(asus->pled.led.dev)) led_classdev_unregister(&asus->pled.led); - if (asus->rled.led.dev) + if (!IS_ERR_OR_NULL(asus->rled.led.dev)) led_classdev_unregister(&asus->rled.led); - if (asus->gled.led.dev) + if (!IS_ERR_OR_NULL(asus->gled.led.dev)) led_classdev_unregister(&asus->gled.led); - if (asus->kled.led.dev) + if (!IS_ERR_OR_NULL(asus->kled.led.dev)) led_classdev_unregister(&asus->kled.led); if (asus->led_workqueue) { destroy_workqueue(asus->led_workqueue);