Hi Jane:
On Thu, Jan 02, 2014 at 11:14:42AM +0800, jiel@xxxxxxxxxxx wrote:
> @@ -119,8 +121,11 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
> {
> int i;
>
> - if (!policy->governor_enabled)
> + mutex_lock(&cpufreq_governor_lock);
> + if (!policy->governor_enabled) {
> + mutex_unlock(&cpufreq_governor_lock);
> return;
> + }
>
> if (!all_cpus) {
> /*
> @@ -135,6 +140,7 @@ void gov_queue_work(struct dbs_data *dbs_data, struct cpufreq_policy *policy,
> for_each_cpu(i, policy->cpus)
> __gov_queue_work(i, dbs_data, delay);
> }
> + mutex_unlock(&cpufreq_governor_lock);
Unlocking in different branches is not the best practice IMO, I'd
recommend doing:
mutex_lock(&cpufreq_governor_lock);
if (!policy->governor_enabled)
goto out_unlock;
...
out_unlock:
mutex_unlock(&cpufreq_governor_lock);
Thanks!
--
Dmitry
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