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PM / Domains: Respect errors from genpd's ->power_off() callback 

The current code in genpd_sync_power_off(), doesn't care about potential
errors being returned from genpd's ->power_off() callback.

Obviously this behaviour could lead to problems, such as incorrectly
setting the genpd's status to GPD_STATE_POWER_OFF, but also to incorrectly
decrease the subdomain count for the masters, which potentially allows them
to be powered off in the next recursive call to genpd_sync_power_off().

Let's fix this behaviour by bailing out when the ->power_off() callback
returns an error code.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2017-03-20 11:19:22 +01:00 committed by Rafael J. Wysocki
parent ffaa42e8a4
commit 1c14967c6e
1 changed files with 2 additions and 1 deletions
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3
drivers/base/power/domain.c
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@ -767,7 +767,8 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock,
/* Choose the deepest state when suspending */
genpd->state_idx = genpd->state_count - 1;
_genpd_power_off(genpd, false);
if (_genpd_power_off(genpd, false))
return;
genpd->status = GPD_STATE_POWER_OFF;