linux-kernel - Re: [PATCH 15/39] drm: renesas: shmobile: Improve error handling

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Date:   Fri, 23 Jun 2023 18:41:12 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Magnus Damm <magnus.damm@...il.com>,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 15/39] drm: renesas: shmobile: Improve error handling

Hi Geert,

Thank you for the patch.

On Thu, Jun 22, 2023 at 11:21:27AM +0200, Geert Uytterhoeven wrote:
> Prepare for DT conversion, where panel probe can be deferred, by
> streamlining error propagation and handling:
>   - Use dev_err_probe() to avoid printing error messages in case of
>     probe deferral,
>   - Propagate errors where needed.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>

> ---
>  drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c |  3 ++-
>  drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c | 14 +++++++++++---
>  2 files changed, 13 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> index 9aa9800899976a23..50fca18282c5cb5e 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c
> @@ -228,7 +228,8 @@ static int shmob_drm_probe(struct platform_device *pdev)
>  
>  	ret = shmob_drm_modeset_init(sdev);
>  	if (ret < 0) {
> -		dev_err(&pdev->dev, "failed to initialize mode setting\n");
> +		dev_err_probe(&pdev->dev, ret,
> +			      "failed to initialize mode setting\n");
>  		goto err_free_drm_dev;
>  	}
>  
> diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c
> index 3051318ddc7999bc..1a62e7f8a8a9e6df 100644
> --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c
> +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_kms.c
> @@ -157,9 +157,17 @@ int shmob_drm_modeset_init(struct shmob_drm_device *sdev)
>  	if (ret)
>  		return ret;
>  
> -	shmob_drm_crtc_create(sdev);
> -	shmob_drm_encoder_create(sdev);
> -	shmob_drm_connector_create(sdev, &sdev->encoder);
> +	ret = shmob_drm_crtc_create(sdev);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = shmob_drm_encoder_create(sdev);
> +	if (ret < 0)
> +		return ret;
> +
> +	ret = shmob_drm_connector_create(sdev, &sdev->encoder);
> +	if (ret < 0)
> +		return ret;
>  
>  	drm_kms_helper_poll_init(sdev->ddev);
>  

-- 
Regards,

Laurent Pinchart