AR7100_PCI_ERROR
bus_space_read_4(sc->sc_bst, sc->sc_bsh, AR7100_PCI_ERROR);
bus_space_write_4(sc->sc_bst, sc->sc_bsh, AR7100_PCI_ERROR,
bus_space_read_4(sc->sc_bst, sc->sc_bsh, AR7100_PCI_ERROR) & 3);