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OpenCloudOS-Kernel
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gma500: Fix backlight crash 

We need to check the NULL case earlier.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Alan Cox 2011-07-05 15:44:34 +01:00 committed by Greg Kroah-Hartman
parent a11c3ec7e9
commit 6a8ca6f5ff
1 changed files with 4 additions and 3 deletions
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7
drivers/staging/gma500/backlight.c
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@ -38,9 +38,10 @@ void gma_backlight_exit(struct drm_device *dev)
{
#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
struct drm_psb_private *dev_priv = dev->dev_private;
dev_priv->backlight_device->props.brightness = 0;
backlight_update_status(dev_priv->backlight_device);
if (dev_priv->backlight_device)
if (dev_priv->backlight_device) {
dev_priv->backlight_device->props.brightness = 0;
backlight_update_status(dev_priv->backlight_device);
backlight_device_unregister(dev_priv->backlight_device);
}
#endif
}