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@gmail.com>
---
 drivers/devfreq/governor_passive.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
index 72c67979ebe1..8055801cf182 100644
--- a/drivers/devfreq/governor_passive.c
+++ b/drivers/devfreq/governor_passive.c
@@ -336,7 +336,6 @@ 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;
 }
-- 
2.36.1

On 22. 6. 20. 07:29, Christian Marangi wrote:
> 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@gmail.com>
> ---
>  drivers/devfreq/governor_passive.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/drivers/devfreq/governor_passive.c b/drivers/devfreq/governor_passive.c
> index 72c67979ebe1..8055801cf182 100644
> --- a/drivers/devfreq/governor_passive.c
> +++ b/drivers/devfreq/governor_passive.c
> @@ -336,7 +336,6 @@ 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;
>  }

Applied. Thanks.

-- 
Best Regards,
Samsung Electronics
Chanwoo Choi