linux-kernel - Re: [PATCH] drm/bridge: tfp410: Remove a small useless code snippet

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Message-ID: <20240512211238.GJ17158@pendragon.ideasonboard.com>
Date: Mon, 13 May 2024 00:12:38 +0300
From: Laurent Pinchart <laurent.pinchart@...asonboard.com>
To: Sui Jingfeng <sui.jingfeng@...ux.dev>
Cc: Maxime Ripard <mripard@...nel.org>,
	Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>, Jonas Karlman <jonas@...boo.se>,
	Jernej Skrabec <jernej.skrabec@...il.com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/bridge: tfp410: Remove a small useless code snippet

Hi Sui,

Thank you for the patch.

On Sat, May 11, 2024 at 09:24:23PM +0800, Sui Jingfeng wrote:
> In the tfp410_attach(), the check on the existence of bridge->encoder has
> already been done in the implementation of drm_bridge_attach() function.
> The driver won't go further if bridge->encoder is NULL and the driver will
> quit even if drm_bridge_attach() fails for some reasons.
> 
> Therefore there is no need to check another time at the later, remove the
> redundant checking codes "if (!bridge->encoder) { ... }".
> 
> Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>

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

> ---
>  drivers/gpu/drm/bridge/ti-tfp410.c | 5 -----
>  1 file changed, 5 deletions(-)
> 
> diff --git a/drivers/gpu/drm/bridge/ti-tfp410.c b/drivers/gpu/drm/bridge/ti-tfp410.c
> index c7bef5c23927..b1b1e4d5a24a 100644
> --- a/drivers/gpu/drm/bridge/ti-tfp410.c
> +++ b/drivers/gpu/drm/bridge/ti-tfp410.c
> @@ -133,11 +133,6 @@ static int tfp410_attach(struct drm_bridge *bridge,
>  	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
>  		return 0;
>  
> -	if (!bridge->encoder) {
> -		dev_err(dvi->dev, "Missing encoder\n");
> -		return -ENODEV;
> -	}
> -
>  	if (dvi->next_bridge->ops & DRM_BRIDGE_OP_DETECT)
>  		dvi->connector.polled = DRM_CONNECTOR_POLL_HPD;
>  	else

-- 
Regards,

Laurent Pinchart