diff options
| author | Shawn Guo <shawn.guo@linaro.org> | 2013-06-17 15:24:23 +0200 |
|---|---|---|
| committer | Zhang Rui <rui.zhang@intel.com> | 2013-08-15 09:48:59 +0200 |
| commit | 178c2490b99f898efc06d1ad75cadc84f13021a6 (patch) | |
| tree | 07d2ccb2548315cb969438b48db4f1af5fb4393d /drivers/thermal | |
| parent | Thermal/cpu_cooling: Return directly for the cpu out of allowed_cpus in the c... (diff) | |
| download | linux-178c2490b99f898efc06d1ad75cadc84f13021a6.tar.xz linux-178c2490b99f898efc06d1ad75cadc84f13021a6.zip | |
thermal: step_wise: cdev only needs update on a new target state
The cooling device only needs update on a new target state. Since we
already check old target in thermal_zone_trip_update(), we can do one
more check to see if it's a new target state. If not, we can reasonably
save some uncecesary code execution.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Diffstat (limited to 'drivers/thermal')
| -rw-r--r-- | drivers/thermal/step_wise.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c index 4d4ddae1a991..0afbd86e4962 100644 --- a/drivers/thermal/step_wise.c +++ b/drivers/thermal/step_wise.c @@ -133,6 +133,9 @@ static void thermal_zone_trip_update(struct thermal_zone_device *tz, int trip) old_target = instance->target; instance->target = get_target_state(instance, trend, throttle); + if (old_target == instance->target) + continue; + /* Activate a passive thermal instance */ if (old_target == THERMAL_NO_TARGET && instance->target != THERMAL_NO_TARGET) |