usbd_get_device_desc
if (usbd_get_device_desc(un->un_udev, &dd))
status = usbd_get_device_desc(sc->sc_udev, &usbddsc);
if (usbd_get_device_desc(dev, &dd) != 0)
err = usbd_get_device_desc(dev, udd);
usbd_status usbd_get_device_desc(struct usbd_device *,