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>

diff --git a/drivers/staging/gma500/backlight.c b/drivers/staging/gma500/backlight.c
index 4027e70..d3e698b 100644 (file)
--- a/drivers/staging/gma500/backlight.c
+++ b/drivers/staging/gma500/backlight.c
@@ -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
 }