xhci_ring_free
xhci_ring_free(sc, &sc->sc_er);
xhci_ring_free(sc, &sc->sc_cr);
static void xhci_ring_free(struct xhci_softc * const,
xhci_ring_free(sc, &xs->xs_xr[dci]);
xhci_ring_free(sc, &xs->xs_xr[dci]);
xhci_ring_free(sc, &sc->sc_cr);
xhci_ring_free(sc, &sc->sc_er);