usbhid_sync_xfer
error = usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, buf);
return (usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req,
error = usbhid_sync_xfer(sc, USBHID_INTR_IN_DT, &req, buf);
return (usbhid_sync_xfer(sc, USBHID_INTR_OUT_DT, &req,
return (usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, NULL));
return (usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, NULL));
error = usbhid_sync_xfer(