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Thermal/cpu_cooling: Return directly for the cpu out of allowed_cpus in the cpufreq_thermal_notifier()

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cpufreq_thermal_notifier() is to change the cpu's cpufreq in the allowed_cpus mask
when associated thermal-cpufreq cdev's cooling state is changed. It's a cpufreq policy
notifier handler and it will be triggered even if those cpus out of allowed_cpus has
changed freq policy.

cpufreq_thermal_notifier() checks the policy->cpu. If it belongs to allowed_cpus,
change max_freq(default to 0) to the desire cpufreq value and pass 0 and max_freq
to cpufreq_verify_within_limits() as cpufreq scope. But if not, do nothing and
max_freq will remain 0. This will cause the cpufreq scope to become 0~0. This
is not right. This patch is to return directly after finding cpu not belonging
to allowed_cpus.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This commit is contained in:
Lan Tianyu 2013-08-13 10:07:28 +08:00 committed by Zhang Rui
parent 584d88b2cd
commit 044d5c26da
1 changed files with 2 additions and 0 deletions
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2
drivers/thermal/cpu_cooling.c
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@ -322,6 +322,8 @@ static int cpufreq_thermal_notifier(struct notifier_block *nb,
if (cpumask_test_cpu(policy->cpu, &notify_device->allowed_cpus))
max_freq = notify_device->cpufreq_val;
else
return 0;
/* Never exceed user_policy.max */
if (max_freq > policy->user_policy.max)