free_states
pd->free_states = pd_free_states;
genpd->free_states = genpd_free_default_power_state;
if (genpd->free_states == genpd_free_default_power_state) {
if (genpd->free_states)
genpd->free_states(genpd->states, genpd->state_count);
void (*free_states)(struct genpd_power_state *states,
free_states(env);