xyc_error
int xyc_error(struct xyc_softc *, struct xy_iorq *, struct xy_iopb *, int);
xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK)
int xyc_error(struct xyc_softc *, struct xy_iorq *,
xyc_error(xycsc, iorq, iopb, comm) == XY_ERR_AOK)