[RESEND PATCH] drm/panfrost: Reduce the amount of logs on deferred probe

[RESEND PATCH] drm/panfrost: Reduce the amount of logs on deferred probe

[Krzysztof Kozlowski]

There is no point to print deferred probe (and its failures to get
resources) as an error.

In case of multiple probe tries this would pollute the dmesg.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
---
 drivers/gpu/drm/panfrost/panfrost_device.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
index 46b0b02e4289..2252147bc285 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.c
+++ b/drivers/gpu/drm/panfrost/panfrost_device.c
@@ -95,7 +95,9 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev)
 		pfdev->regulator = NULL;
 		if (ret == -ENODEV)
 			return 0;
-		dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
+		if (ret != -EPROBE_DEFER)
+			dev_err(pfdev->dev, "failed to get regulator: %d\n",
+				ret);
 		return ret;
 	}
 
-- 
2.17.1

Re: [RESEND PATCH] drm/panfrost: Reduce the amount of logs on deferred probe

[Steven Price]

On 09/09/2019 16:51, Krzysztof Kozlowski wrote:
> There is no point to print deferred probe (and its failures to get
> resources) as an error.
> 
> In case of multiple probe tries this would pollute the dmesg.
> 
> Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>

Looks like a good idea, however from what I can tell you haven't
completely silenced the 'error' as the return from
panfrost_regulator_init() will be -EPROBE_DEFER causing another
dev_err() output:

        err = panfrost_regulator_init(pfdev);
        if (err) {
                dev_err(pfdev->dev, "regulator init failed %d\n", err);
                goto err_out0;
        }

Can you fix that up as well? Or indeed drop it altogether since
panfrost_regulator_init() already outputs an appropriate message.

Steve

> ---
>  drivers/gpu/drm/panfrost/panfrost_device.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c b/drivers/gpu/drm/panfrost/panfrost_device.c
> index 46b0b02e4289..2252147bc285 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_device.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_device.c
> @@ -95,7 +95,9 @@ static int panfrost_regulator_init(struct panfrost_device *pfdev)
>  		pfdev->regulator = NULL;
>  		if (ret == -ENODEV)
>  			return 0;
> -		dev_err(pfdev->dev, "failed to get regulator: %d\n", ret);
> +		if (ret != -EPROBE_DEFER)
> +			dev_err(pfdev->dev, "failed to get regulator: %d\n",
> +				ret);
>  		return ret;
>  	}
>  
> 

Re: [RESEND PATCH] drm/panfrost: Reduce the amount of logs on deferred probe

[Krzysztof Kozlowski]

On Thu, Sep 12, 2019 at 10:36:25AM +0100, Steven Price wrote:
> On 09/09/2019 16:51, Krzysztof Kozlowski wrote:
> > There is no point to print deferred probe (and its failures to get
> > resources) as an error.
> > 
> > In case of multiple probe tries this would pollute the dmesg.
> > 
> > Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
> 
> Looks like a good idea, however from what I can tell you haven't
> completely silenced the 'error' as the return from
> panfrost_regulator_init() will be -EPROBE_DEFER causing another
> dev_err() output:
> 
>         err = panfrost_regulator_init(pfdev);
>         if (err) {
>                 dev_err(pfdev->dev, "regulator init failed %d\n", err);
>                 goto err_out0;
>         }
> 
> Can you fix that up as well? Or indeed drop it altogether since
> panfrost_regulator_init() already outputs an appropriate message.

I'll drop this error message then. Thanks for feedback!

Best regards,
Krzysztof