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| author | Ulf Hansson <ulf.hansson@linaro.org> | 2021-06-03 11:34:36 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2021-06-11 18:39:24 +0200 |
| commit | d97fe100ee0b36c5dd8013ffd70fe8fcdcabff2b (patch) | |
| tree | 76e151367dac89e324c223ce9cd94ebeb2138aa5 /drivers/base/power | |
| parent | PM: domains: Split code in dev_pm_genpd_set_performance_state() (diff) | |
| download | linux-d97fe100ee0b36c5dd8013ffd70fe8fcdcabff2b.tar.xz linux-d97fe100ee0b36c5dd8013ffd70fe8fcdcabff2b.zip | |
PM: domains: Return early if perf state is already set for the device
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>
Diffstat (limited to 'drivers/base/power')
| -rw-r--r-- | drivers/base/power/domain.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c index ede0f576efe6..90a9828fcb2f 100644 --- a/drivers/base/power/domain.c +++ b/drivers/base/power/domain.c @@ -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); |