static void sg_clean(struct usb_sg_request *io)
{
	if (io->urbs) {
		while (io->entries--)
			usb_free_urb(io->urbs[io->entries]);
		kfree(io->urbs);
		io->urbs = NULL;
	}
	io->dev = NULL;
}
static void sg_clean(struct usb_sg_request *io)
{
	if (io->urbs) {
		while (io->entries--)
			usb_free_urb(io->urbs[io->entries]);
		kfree(io->urbs);
		io->urbs = NULL;
	}
	io->dev = NULL;
}