linux-kernel - Re: [PATCH v4 4/4] PM / devfreq: Mute warning on governor PROBE

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Date:   Wed, 15 Jun 2022 15:56:31 +0900
From:   Chanwoo Choi <cwchoi00@...il.com>
To:     Christian 'Ansuel' Marangi <ansuelsmth@...il.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Sibi Sankar <sibis@...eaurora.org>,
        Saravana Kannan <skannan@...eaurora.org>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 4/4] PM / devfreq: Mute warning on governor PROBE_DEFER

On 22. 6. 15. 08:09, Christian 'Ansuel' Marangi wrote:
> Don't print warning when a governor PROBE_DEFER as it's not a real
> GOV_START fail.
> 
> Fixes: a03dacb0316f ("PM / devfreq: Add cpu based scaling support to passive governor")
> Signed-off-by: Christian 'Ansuel' Marangi <ansuelsmth@...il.com>
> ---
>  drivers/devfreq/devfreq.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index 2e2b3b414d67..6a39638ed064 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -931,8 +931,9 @@ struct devfreq *devfreq_add_device(struct device *dev,
>  	err = devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_START,
>  						NULL);
>  	if (err) {
> -		dev_err(dev, "%s: Unable to start governor for the device\n",
> -			__func__);
> +		dev_err_probe(dev, err,
> +			      "%s: Unable to start governor for the device\n",
> +			      __func__);
>  		goto err_init;
>  	}
>  	create_sysfs_files(devfreq, devfreq->governor);


In order to keep the left-align with above error log
when try_then_request_governor() is failed,
I recommend to use the tab without space indentation as following:

If you have no objection, I'll merge this change.

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index 01474daf4548..80a1235ef8fb 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -932,8 +932,9 @@ struct devfreq *devfreq_add_device(struct device *dev,
        err = devfreq->governor->event_handler(devfreq, DEVFREQ_GOV_START,
                                                NULL);
        if (err) {
-               dev_err(dev, "%s: Unable to start governor for the device\n",
-                       __func__);
+               dev_err_probe(dev, err,
+                       "%s: Unable to start governor for the device\n",
+                        __func__);
                goto err_init;
        }
        create_sysfs_files(devfreq, devfreq->governor);





-- 
Best Regards,
Samsung Electronics
Chanwoo Choi