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cpufreq: interactive: don't handle transition notification if not enabled

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If multiple governors are in use then avoid processing frequency transition
notifications for CPUs on which the interactive governor is not enabled.

Change-Id: Ibd75255b921d887501a64774a8c4f62302f2d4e4
Reported-by: Francisco Franco <francisco.franco@cloudcar.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2012-12-23 12:28:49 -08:00
committed by John Stultz
parent c5ec6c6724
commit 06371b575f
1 changed files with 8 additions and 1 deletions
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9
drivers/cpufreq/cpufreq_interactive.c
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@@ -552,6 +552,12 @@ static int cpufreq_interactive_notifier(
if (val == CPUFREQ_POSTCHANGE) {
pcpu = &per_cpu(cpuinfo, freq->cpu);
if (!down_read_trylock(&pcpu->enable_sem))
return 0;
if (!pcpu->governor_enabled) {
up_read(&pcpu->enable_sem);
return 0;
}
for_each_cpu(cpu, pcpu->policy->cpus) {
struct cpufreq_interactive_cpuinfo *pjcpu =
@@ -560,8 +566,9 @@ static int cpufreq_interactive_notifier(
update_load(cpu);
spin_unlock(&pjcpu->load_lock);
}
}
up_read(&pcpu->enable_sem);
}
return 0;
}