access_fmri
subchassis_val = access_fmri(slmp, expander->fmri, SUBCHASSIS,
(void) access_fmri(slmp, fmri, CONTROLLER, INVERT_FMRI_INSTANCE, &err);
(void) access_fmri(slmp, fmri, SASEXPANDER, INVERT_FMRI_INSTANCE, &err);