USB: appletouch: fix atp_disconnect

appletouch uses urb->transfer_dma after having freed the urb, this shows
up only if the system is compiled with slab debugging. This patch fixes
it by reordering the free calls.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/input/appletouch.c

@@ -597,9 +597,9 @@ static void atp_disconnect(struct usb_interface *iface)
 	if (dev) {
 		usb_kill_urb(dev->urb);
 		input_unregister_device(dev->input);
-		usb_free_urb(dev->urb);
 		usb_buffer_free(dev->udev, dev->datalen,
 				dev->data, dev->urb->transfer_dma);
+		usb_free_urb(dev->urb);
 		kfree(dev);
 	}
 	printk(KERN_INFO "input: appletouch disconnected\n");