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PM: domains: Return early if perf state is already set for the device

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When dev_pm_genpd_set_performance_state() gets called to set a new
performance state for the device, let's take a quicker path by doing an
early return, if it turns out that the new state is already set for the
device.

Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ulf Hansson 2021-06-03 11:34:36 +02:00 committed by Rafael J. Wysocki
parent 0eef091d2d
commit d97fe100ee
1 changed files with 3 additions and 0 deletions
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3
drivers/base/power/domain.c
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@ -387,6 +387,9 @@ static int genpd_set_performance_state(struct device *dev, unsigned int state)
int ret;
prev_state = gpd_data->performance_state;
if (prev_state == state)
return 0;
gpd_data->performance_state = state;
state = _genpd_reeval_performance_state(genpd, state);