policy->cpu, event);
mutex_lock(&cpufreq_governor_lock);
- if ((!policy->governor_enabled && (event == CPUFREQ_GOV_STOP)) ||
- (policy->governor_enabled && (event == CPUFREQ_GOV_START))) {
+ if (policy->governor_busy
+ || (policy->governor_enabled && event == CPUFREQ_GOV_START)
+ || (!policy->governor_enabled
+ && (event == CPUFREQ_GOV_LIMITS || event == CPUFREQ_GOV_STOP))) {
mutex_unlock(&cpufreq_governor_lock);
return -EBUSY;
}
+ policy->governor_busy = true;
if (event == CPUFREQ_GOV_STOP)
policy->governor_enabled = false;
else if (event == CPUFREQ_GOV_START)
if ((event == CPUFREQ_GOV_STOP) && !ret)
module_put(policy->governor->owner);
+ mutex_lock(&cpufreq_governor_lock);
+ policy->governor_busy = false;
+ mutex_unlock(&cpufreq_governor_lock);
return ret;
}
struct cpufreq_governor *governor; /* see below */
void *governor_data;
bool governor_enabled; /* governor start/stop flag */
+ bool governor_busy;
struct work_struct update; /* if update_policy() needs to be
* called, but you're in IRQ context */