ahci_intr_port
ret |= ahci_intr_port(&sc->sc_channels[0].ata_channel);
ret |= ahci_intr_port(&sc->sc_channels[1].ata_channel);
ahci_intr_port(achp);
ahci_intr_port(achp);
ahci_intr_port(achp);
int ahci_intr_port(void *);
intr_handler = ahci_intr_port;