cpufreq: interactive: don't handle transition notification if not enabled
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>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index c8358a3..51c34bf 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -552,6 +552,12 @@
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 @@
update_load(cpu);
spin_unlock(&pjcpu->load_lock);
}
- }
+ up_read(&pcpu->enable_sem);
+ }
return 0;
}