cpufreq: Add policy create/remove notifiers back
This effectively reverts some changes made by commit f9f41e3ef99
("cpufreq: Remove policy create/remove notifiers").
We have a new use case for policy create/remove notifiers (for
allocating/freeing QoS requests per policy), so add them back.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
[ rjw: Subject & changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 8dda623..c13dcb5 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -1266,7 +1266,17 @@ static void cpufreq_policy_free(struct cpufreq_policy *policy)
DEV_PM_QOS_MAX_FREQUENCY);
dev_pm_qos_remove_notifier(dev, &policy->nb_min,
DEV_PM_QOS_MIN_FREQUENCY);
- dev_pm_qos_remove_request(policy->max_freq_req);
+
+ if (policy->max_freq_req) {
+ /*
+ * CPUFREQ_CREATE_POLICY notification is sent only after
+ * successfully adding max_freq_req request.
+ */
+ blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+ CPUFREQ_REMOVE_POLICY, policy);
+ dev_pm_qos_remove_request(policy->max_freq_req);
+ }
+
dev_pm_qos_remove_request(policy->min_freq_req);
kfree(policy->min_freq_req);
@@ -1391,6 +1401,9 @@ static int cpufreq_online(unsigned int cpu)
ret);
goto out_destroy_policy;
}
+
+ blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
+ CPUFREQ_CREATE_POLICY, policy);
}
if (cpufreq_driver->get && has_target()) {