st_load
error = st_load(st, LD_RETENSION, flags);
error = st_load(st, LD_LOAD, flags);
static int st_load(struct st_softc *, u_int, int);
if ((error = st_load(st, LD_LOAD, XS_CTL_SILENT)) != 0)
st_load(st, LD_UNLOAD, XS_CTL_IGNORE_NOT_READY);