diff mbox series

[V4.1,3/4] cpufreq: powernv: Migrate to ->exit() callback instead of ->stop_cpu()

Message ID fec6e49c9b9b43080525c9eaddcc0e7e0fd4050f.1624428000.git.viresh.kumar@linaro.org
State Accepted
Commit 952da0c9ab5b047665442dc239cee36d5c9edb98
Headers show
Series None | expand

Commit Message

Viresh Kumar June 23, 2021, 6:01 a.m. UTC 
commit 367dc4aa932b ("cpufreq: Add stop CPU callback to cpufreq_driver
interface") added the stop_cpu() callback to allow the drivers to do
clean up before the CPU is completely down and its state can't be
modified.

At that time the CPU hotplug framework used to call the cpufreq core's
registered notifier for different events like CPU_DOWN_PREPARE and
CPU_POST_DEAD. The stop_cpu() callback was called during the
CPU_DOWN_PREPARE event.

This is no longer the case, cpuhp_cpufreq_offline() is called only once
by the CPU hotplug core now and we don't really need two separate
callbacks for cpufreq drivers, i.e. stop_cpu() and exit(), as everything
can be done from the exit() callback itself.

Migrate to using the exit() callback instead of stop_cpu().

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

---
V4->V4.1:
- s/powerenv/powernv/

 drivers/cpufreq/powernv-cpufreq.c | 23 +++++++++--------------
 1 file changed, 9 insertions(+), 14 deletions(-)

-- 
2.31.1.272.g89b43f80a514
diff mbox series

Patch

diff --git a/drivers/cpufreq/powernv-cpufreq.c b/drivers/cpufreq/powernv-cpufreq.c
index e439b43c19eb..005600cef273 100644
--- a/drivers/cpufreq/powernv-cpufreq.c
+++ b/drivers/cpufreq/powernv-cpufreq.c
@@ -875,7 +875,15 @@  static int powernv_cpufreq_cpu_init(struct cpufreq_policy *policy)
 
 static int powernv_cpufreq_cpu_exit(struct cpufreq_policy *policy)
 {
-	/* timer is deleted in cpufreq_cpu_stop() */
+	struct powernv_smp_call_data freq_data;
+	struct global_pstate_info *gpstates = policy->driver_data;
+
+	freq_data.pstate_id = idx_to_pstate(powernv_pstate_info.min);
+	freq_data.gpstate_id = idx_to_pstate(powernv_pstate_info.min);
+	smp_call_function_single(policy->cpu, set_pstate, &freq_data, 1);
+	if (gpstates)
+		del_timer_sync(&gpstates->timer);
+
 	kfree(policy->driver_data);
 
 	return 0;
@@ -1007,18 +1015,6 @@  static struct notifier_block powernv_cpufreq_opal_nb = {
 	.priority	= 0,
 };
 
-static void powernv_cpufreq_stop_cpu(struct cpufreq_policy *policy)
-{
-	struct powernv_smp_call_data freq_data;
-	struct global_pstate_info *gpstates = policy->driver_data;
-
-	freq_data.pstate_id = idx_to_pstate(powernv_pstate_info.min);
-	freq_data.gpstate_id = idx_to_pstate(powernv_pstate_info.min);
-	smp_call_function_single(policy->cpu, set_pstate, &freq_data, 1);
-	if (gpstates)
-		del_timer_sync(&gpstates->timer);
-}
-
 static unsigned int powernv_fast_switch(struct cpufreq_policy *policy,
 					unsigned int target_freq)
 {
@@ -1042,7 +1038,6 @@  static struct cpufreq_driver powernv_cpufreq_driver = {
 	.target_index	= powernv_cpufreq_target_index,
 	.fast_switch	= powernv_fast_switch,
 	.get		= powernv_cpufreq_get,
-	.stop_cpu	= powernv_cpufreq_stop_cpu,
 	.attr		= powernv_cpu_freq_attr,
 };