Re: Patch "drm/drm-bridge: Drop conditionals around of_node pointers" has been added to the 6.6-stable t

[Pascal Ernster <git@hardfalcon.net>]

[2024-09-04 19:50] Sasha Levin:
> This is a note to let you know that I've just added the patch titled
> 
>      drm/drm-bridge: Drop conditionals around of_node pointers
> 
> to the 6.6-stable tree which can be found at:
>      http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> The filename of the patch is:
>       drm-drm-bridge-drop-conditionals-around-of_node-poin.patch
> and it can be found in the queue-6.6 subdirectory.
> 
> If you, or anyone else, feels it should not be added to the stable tree,
> please let <stable@vger.kernel.org> know about it.
> 
> 
> 
> commit 74f5f42c35daf9aedbc96283321c30fc591c634f
> Author: Sui Jingfeng <sui.jingfeng@linux.dev>
> Date:   Wed May 8 02:00:00 2024 +0800
> 
>      drm/drm-bridge: Drop conditionals around of_node pointers
>      
>      [ Upstream commit ad3323a6ccb7d43bbeeaa46d5311c43d5d361fc7 ]
>      
>      Having conditional around the of_node pointer of the drm_bridge structure
>      is not necessary, since drm_bridge structure always has the of_node as its
>      member.
>      
>      Let's drop the conditional to get a better looks, please also note that
>      this is following the already accepted commitments. see commit d8dfccde2709
>      ("drm/bridge: Drop conditionals around of_node pointers") for reference.
>      
>      Signed-off-by: Sui Jingfeng <sui.jingfeng@linux.dev>
>      Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
>      Signed-off-by: Robert Foss <rfoss@kernel.org>
>      Link: https://patchwork.freedesktop.org/patch/msgid/20240507180001.1358816-1-sui.jingfeng@linux.dev
>      Signed-off-by: Sasha Levin <sashal@kernel.org>
> 
> diff --git a/drivers/gpu/drm/drm_bridge.c b/drivers/gpu/drm/drm_bridge.c
> index 62d8a291c49c..70b05582e616 100644
> --- a/drivers/gpu/drm/drm_bridge.c
> +++ b/drivers/gpu/drm/drm_bridge.c
> @@ -353,13 +353,8 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge,
>   	bridge->encoder = NULL;
>   	list_del(&bridge->chain_node);
>   
> -#ifdef CONFIG_OF
>   	DRM_ERROR("failed to attach bridge %pOF to encoder %s: %d\n",
>   		  bridge->of_node, encoder->name, ret);
> -#else
> -	DRM_ERROR("failed to attach bridge to encoder %s: %d\n",
> -		  encoder->name, ret);
> -#endif
>   
>   	return ret;
>   }


Hi Sasha,


this breaks the x86_64 build for me.

AFAICT this patch cannot work without commit 
d8dfccde2709de4327c3d62b50e5dc012f08836f "drm/bridge: Drop conditionals 
around of_node pointers", but that commit is only present in Linux >= 6.7.

This issue affects the 6.6, 6.1 and 5.15 branches.


Regards
Pascal