usbd_get_string_desc
if (!ethd || usbd_get_string_desc(sc->cdce_udev, ethd->iMacAddress, 0,
error = usbd_get_string_desc(sc->sc_udev, dd->iSerialNumber,
err = usbd_get_string_desc(dev, USB_LANGUAGE_TABLE, 0, &us,
err = usbd_get_string_desc(dev, si, dev->langid, &us, &size);
usbd_status usbd_get_string_desc(struct usbd_device *dev, int sindex,