[PATCH 5.18 421/879] PM: EM: Decrement policy counter

From: Greg Kroah-Hartman
Date: Tue Jun 07 2022 - 20:15:55 EST


From: Pierre Gondois <Pierre.Gondois@xxxxxxx>

[ Upstream commit c9d8923bfbcb63f15ea6cb2b5c8426fc3d96f643 ]

In commit e458716a92b57 ("PM: EM: Mark inefficiencies in CPUFreq"),
cpufreq_cpu_get() is called without a cpufreq_cpu_put(), permanently
increasing the reference counts of the policy struct.

Decrement the reference count once the policy struct is not used
anymore.

Fixes: e458716a92b57 ("PM: EM: Mark inefficiencies in CPUFreq")
Tested-by: Cristian Marussi <cristian.marussi@xxxxxxx>
Signed-off-by: Pierre Gondois <pierre.gondois@xxxxxxx>
Reviewed-by: Vincent Donnefort <vincent.donnefort@xxxxxxx>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
kernel/power/energy_model.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/kernel/power/energy_model.c b/kernel/power/energy_model.c
index 0153b0ca7b23..6219aaa454b5 100644
--- a/kernel/power/energy_model.c
+++ b/kernel/power/energy_model.c
@@ -259,6 +259,8 @@ static void em_cpufreq_update_efficiencies(struct device *dev)
found++;
}

+ cpufreq_cpu_put(policy);
+
if (!found)
return;

--
2.35.1