usb_delay_ms_locked
usb_delay_ms_locked(&sc->sc_bus, 2, &sc->sc_lock);
usb_delay_ms_locked(&sc->sc_bus, OHCI_ITD_NOFFSET, &sc->sc_lock);
usb_delay_ms_locked(upipe->pipe.up_dev->ud_bus, 2, &sc->sc_lock);
usb_delay_ms_locked(&sc->sc_bus, 2, &sc->sc_lock);
usb_delay_ms_locked(&sc->sc_bus, 2, &sc->sc_lock);
usb_delay_ms_locked(bus, ms, NULL);
usb_delay_ms_locked(dev->ud_bus, ms, lock);
usb_delay_ms_locked(dev->ud_bus, ms, NULL);
void usb_delay_ms_locked(struct usbd_bus *, u_int, kmutex_t *);