thermal: cpu_cooling: Remove cpu_dev update on policy CPU update
It was initially understood that an update to the cpu_device
(cached in cpufreq_cooling_device) was required to ascertain the
correct operating point of the device on a cpufreq policy->cpu update
or creation or deletion of a cpufreq policy.
(e.g. when the existing policy CPU goes offline).
This update is not required and it is possible to ascertain the OPPs
from the leading CPU in a cpufreq domain even if the CPU is hotplugged out.
Fixes: e0128d8ab423 ("thermal: cpu_cooling: implement the power cooling device API")
Acked-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Kapileshwar Singh <kapileshwar.singh@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index 3a01dfd..beffa55 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -199,39 +199,6 @@
}
EXPORT_SYMBOL_GPL(cpufreq_cooling_get_level);
-static void update_cpu_device(int cpu)
-{
- struct cpufreq_cooling_device *cpufreq_dev;
-
- mutex_lock(&cooling_cpufreq_lock);
- list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) {
- if (cpumask_test_cpu(cpu, &cpufreq_dev->allowed_cpus)) {
- cpufreq_dev->cpu_dev = get_cpu_device(cpu);
- if (!cpufreq_dev->cpu_dev) {
- dev_warn(&cpufreq_dev->cool_dev->device,
- "No cpu device for new policy cpu %d\n",
- cpu);
- }
- break;
- }
- }
- mutex_unlock(&cooling_cpufreq_lock);
-}
-
-static void remove_cpu_device(int cpu)
-{
- struct cpufreq_cooling_device *cpufreq_dev;
-
- mutex_lock(&cooling_cpufreq_lock);
- list_for_each_entry(cpufreq_dev, &cpufreq_dev_list, node) {
- if (cpumask_test_cpu(cpu, &cpufreq_dev->allowed_cpus)) {
- cpufreq_dev->cpu_dev = NULL;
- break;
- }
- }
- mutex_unlock(&cooling_cpufreq_lock);
-}
-
/**
* cpufreq_thermal_notifier - notifier callback for cpufreq policy change.
* @nb: struct notifier_block * with callback info.
@@ -268,13 +235,6 @@
}
mutex_unlock(&cooling_cpufreq_lock);
break;
-
- case CPUFREQ_CREATE_POLICY:
- update_cpu_device(policy->cpu);
- break;
- case CPUFREQ_REMOVE_POLICY:
- remove_cpu_device(policy->cpu);
- break;
default:
return NOTIFY_DONE;
}