[PATCH] USB: disable both sides of usb device ep0 at once

This eliminates an error case (current cost, memleak) when
disabling endpoints that have control requests queued.

drivers/usb/core/hcd.c

@@ -1307,7 +1307,8 @@ static void hcd_endpoint_disable (struct usb_device *udev, int endpoint)
 		/* ignore urbs for other endpoints */
 		if (usb_pipeendpoint (tmp) != epnum)
 			continue;
-		if ((tmp ^ endpoint) & USB_DIR_IN)
+		/* NOTE assumption that only ep0 is a control endpoint */
+		if (epnum != 0 && ((tmp ^ endpoint) & USB_DIR_IN))
 			continue;
 
 		/* another cpu may be in hcd, spinning on hcd_data_lock