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PM / Domains: Add generic data pointer to struct genpd_power_state

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Add a data pointer to the genpd_power_state struct, to allow a genpd
backend driver to store per-state specific data. To introduce the
pointer, change the way genpd deals with freeing of the corresponding
allocated data.

More precisely, clarify the responsibility of whom that shall free the
data, by adding a ->free_states() callback to the generic_pm_domain
structure. The one allocating the data will be expected to set the
callback, to allow genpd to invoke it from genpd_remove().

Co-developed-by: Lina Iyer <lina.iyer@linaro.org>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson
2019-03-27 15:35:45 +01:00
committed by Rafael J. Wysocki
parent c324f43aed
commit 49a27e2790
2 changed files with 13 additions and 3 deletions
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12
drivers/base/power/domain.c
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@@ -1686,6 +1686,12 @@ out:
}
EXPORT_SYMBOL_GPL(pm_genpd_remove_subdomain);
static void genpd_free_default_power_state(struct genpd_power_state *states,
unsigned int state_count)
{
kfree(states);
}
static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
{
struct genpd_power_state *state;
@@ -1696,7 +1702,7 @@ static int genpd_set_default_power_state(struct generic_pm_domain *genpd)
genpd->states = state;
genpd->state_count = 1;
genpd->free = state;
genpd->free_states = genpd_free_default_power_state;
return 0;
}
@@ -1812,7 +1818,9 @@ static int genpd_remove(struct generic_pm_domain *genpd)
list_del(&genpd->gpd_list_node);
genpd_unlock(genpd);
cancel_work_sync(&genpd->power_off_work);
kfree(genpd->free);
if (genpd->free_states)
genpd->free_states(genpd->states, genpd->state_count);
pr_debug("%s: removed %s\n", __func__, genpd->name);
return 0;