usbd_request_async
error = usbd_request_async(xfer, &req, sc, bwfm_usb_txctl_cb);
return usbd_request_async(xfer, &req, NULL, NULL);
if (usbd_request_async(xfer, &req, NULL, NULL))
if (usbd_request_async(xfer, &req, info, uhidev_get_report_async_cb)) {
err = usbd_request_async(xfer, &req, NULL, NULL);
usbd_status usbd_request_async(struct usbd_xfer *xfer,