Re: [PATCH] drm/bridge: ti-sn65dsi86: Use dev_err_probe() to avoid polluting the log

[Andrzej Hajda <andrzej.hajda@intel.com>]

On 22.07.2022 09:47, Javier Martinez Canillas wrote:
> If devm_drm_of_get_bridge() can't find the connected bridge, it returns an
> ERR_PTR(-EPROBE_DEFER) to indicate that the probe should be deferred.
>
> But this path also prints an error message, which pollutes the kernel log
> since is printed on every probe deferral, i.e:
>
>    $ dmesg | grep "failed to create panel bridge" | wc -l
>    38
>
> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com>

Reviewed-by: Andrzej Hajda <andrzej.hajda@intel.com>

Regards
Andrzej

> ---
>
>   drivers/gpu/drm/bridge/ti-sn65dsi86.c | 7 +++----
>   1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> index 369bf72717f6..90bbabde1595 100644
> --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c
> @@ -1206,10 +1206,9 @@ static int ti_sn_bridge_probe(struct auxiliary_device *adev,
>   	int ret;
>   
>   	pdata->next_bridge = devm_drm_of_get_bridge(pdata->dev, np, 1, 0);
> -	if (IS_ERR(pdata->next_bridge)) {
> -		DRM_ERROR("failed to create panel bridge\n");
> -		return PTR_ERR(pdata->next_bridge);
> -	}
> +	if (IS_ERR(pdata->next_bridge))
> +		return dev_err_probe(pdata->dev, PTR_ERR(pdata->next_bridge),
> +				     "failed to create panel bridge\n");
>   
>   	ti_sn_bridge_parse_lanes(pdata, np);
>