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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2017-03-20 11:19:22 +0100 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-03-29 00:11:34 +0200 |
| commit | 1c14967c6ea0deb3db4a974b1de519f5a5593ef4 (patch) | |
| tree | 37685d825177673bcb3d82c577ee36fefc1eac01 /drivers/base | |
| parent | PM / Domains: Enable users of genpd to specify always on PM domains (diff) | |
| download | linux-1c14967c6ea0deb3db4a974b1de519f5a5593ef4.tar.xz linux-1c14967c6ea0deb3db4a974b1de519f5a5593ef4.zip | |
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>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/power/domain.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index c71a7ef08b05..c0318c130396 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -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; |