>input_dev *input)

quoted

 	if (error)
 		return error;
 
+	if (dev->open)
+		dev->open(dev);
+
 	if (dev->flush)
 		dev->flush(dev);

Hmm... I think having both open and flush is overkill. My 
fault for not looking closer, I will kill the flush and 
convert existing users to open.

Good. So I can continue work with my drivers with an assumption that
there are open and close methods available at some point.

Samu