usbd_transfer_enqueue
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&xfer->xroot->bus->intr_q, xfer);
usbd_transfer_enqueue(&sc->sc_bus.intr_q, xfer);
usbd_transfer_enqueue(pq, xfer);
usbd_transfer_enqueue(pq, xfer);
void usbd_transfer_enqueue(struct usb_xfer_queue *pq,