AHCI_P_SERR
AHCI_WRITE(sc, AHCI_P_SERR(chp->ch_channel),
AHCI_READ(sc, AHCI_P_SERR(chp->ch_channel)));
AHCI_P_SERR(i), 4, &achp->ahcic_serror) != 0) {
AHCI_READ(sc, AHCI_P_SERR(chp->ch_channel))),