ALC_MSI_RETRANS_TIMER
ctl = CSR_READ_4(sc, ALC_MSI_RETRANS_TIMER);
CSR_WRITE_4(sc, ALC_MSI_RETRANS_TIMER, ctl |
CSR_WRITE_4(sc, ALC_MSI_RETRANS_TIMER, ctl |
CSR_WRITE_4(sc, ALC_MSI_RETRANS_TIMER, 0);