device_create_file() can fail.  This causes the sparc64 compile to
fail when my fanatical __must_check patch is applied, due to -Werror.
[ Added necessary identical fix for sparc32. -DaveM]
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
        if (rc)
                return rc;
 
-       device_create_file(&ofdev->dev, &dev_attr_devspec);
+       rc = device_create_file(&ofdev->dev, &dev_attr_devspec);
+       if (rc)
+               device_unregister(&ofdev->dev);
 
-       return 0;
+       return rc;
 }
 
 void of_device_unregister(struct of_device *ofdev)
 
        if (rc)
                return rc;
 
-       device_create_file(&ofdev->dev, &dev_attr_devspec);
+       rc = device_create_file(&ofdev->dev, &dev_attr_devspec);
+       if (rc)
+               device_unregister(&ofdev->dev);
 
-       return 0;
+       return rc;
 }
 
 void of_device_unregister(struct of_device *ofdev)