USB_GET_IFACE_DRIVER
if (ioctl(pdev->file, IOUSB(USB_GET_IFACE_DRIVER), &ugd)) {
args->cmd = USB_GET_IFACE_DRIVER;
case USB_GET_IFACE_DRIVER:
_IOC_NEWTYPE(USB_GET_IFACE_DRIVER, struct usb_gen_descriptor32)