mpr_diag_action_t
static int mpr_user_diag_action(struct mpr_softc *sc, mpr_diag_action_t *data);
mpr_user_diag_action(struct mpr_softc *sc, mpr_diag_action_t *data)
error = mpr_user_diag_action(sc, (mpr_diag_action_t *)arg);