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PM / Domains: Propagate start and restore errors during runtime resume

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During runtime resume the return values of the start and restore steps
are ignored. As a result drivers are not notified of runtime resume
failures and can't propagate them up. Fix it by returning an error if
either the start or restore step fails, and clean up properly in the
error path.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Kevin Hilman <khilman@baylibre.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Laurent Pinchart 2016-03-02 01:20:38 +02:00 committed by Rafael J. Wysocki
parent 0ba554e45c
commit 076395cae2
1 changed files with 18 additions and 2 deletions
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20
drivers/base/power/domain.c
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@ -487,8 +487,13 @@ static int pm_genpd_runtime_resume(struct device *dev)
if (timed && runtime_pm)
time_start = ktime_get();
genpd_start_dev(genpd, dev);
genpd_restore_dev(genpd, dev);
ret = genpd_start_dev(genpd, dev);
if (ret)
goto err_poweroff;
ret = genpd_restore_dev(genpd, dev);
if (ret)
goto err_stop;
/* Update resume latency value if the measured time exceeds it. */
if (timed && runtime_pm) {
@ -503,6 +508,17 @@ static int pm_genpd_runtime_resume(struct device *dev)
}
return 0;
err_stop:
genpd_stop_dev(genpd, dev);
err_poweroff:
if (!dev->power.irq_safe) {
mutex_lock(&genpd->lock);
genpd_poweroff(genpd, 0);
mutex_unlock(&genpd->lock);
}
return ret;
}
static bool pd_ignore_unused;