This is a note to let you know that I've just added the patch titled
PM / devfreq: Fix kernel warning with cpufreq passive register fail
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
pm-devfreq-fix-kernel-warning-with-cpufreq-passive-r.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit a53d3ccecf54330cba08207ee470a3456b785b13
Author: Christian Marangi <ansuelsmth@xxxxxxxxx>
Date: Mon Jun 20 00:29:39 2022 +0200
PM / devfreq: Fix kernel warning with cpufreq passive register fail
[ Upstream commit 82c66d2bbbeda9e493487e7413769087a0b46250 ]
Remove cpufreq_passive_unregister_notifier from
cpufreq_passive_register_notifier in case of error as devfreq core
already call unregister on GOV_START fail.
This fix the kernel always printing a WARN on governor PROBE_DEFER as
cpufreq_passive_unregister_notifier is called two times and return
error on the second call as the cpufreq is already unregistered.
Fixes: a03dacb0316f ("PM / devfreq: Add cpu based scaling support to passive governor")
Signed-off-by: Christian Marangi <ansuelsmth@xxxxxxxxx>
Signed-off-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
index 9997332af3df..c516d3733267 100644
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -293,7 +293,6 @@ static int cpufreq_passive_register_notifier(struct devfreq *devfreq)
err_put_policy:
cpufreq_cpu_put(policy);
err:
- WARN_ON(cpufreq_passive_unregister_notifier(devfreq));
return ret;
}
