linux-kernel - [PATCH v2 04/12] drm/bridge: panel: Remove a redundant check on existence of bridge->encoder

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Message-ID: <20240513153109.46786-5-sui.jingfeng@linux.dev>
Date: Mon, 13 May 2024 23:31:01 +0800
From: Sui Jingfeng <sui.jingfeng@...ux.dev>
To: Laurent Pinchart <Laurent.pinchart@...asonboard.com>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Douglas Anderson <dianders@...omium.org>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	Liu Ying <victor.liu@....com>,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	imx@...ts.linux.dev,
	Sui Jingfeng <sui.jingfeng@...ux.dev>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: [PATCH v2 04/12] drm/bridge: panel: Remove a redundant check on existence of bridge->encoder

Because the existence of 'bridge->encoder' has already been checked before
the panel_bridge_attach() function get called, and the drm_bridge_attach()
will quit with a negative error code returned if it fails for some reasons.
Hence, it is guaranteed that the .encoder member of the drm_bridge instance
is not NULL when panel_bridge_attach() function get called.

Remove the redundant checking codes "if (!bridge->encoder) { ... }".

Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
---
 drivers/gpu/drm/bridge/panel.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/panel.c b/drivers/gpu/drm/bridge/panel.c
index 32506524d9a2..56c40b516a8f 100644
--- a/drivers/gpu/drm/bridge/panel.c
+++ b/drivers/gpu/drm/bridge/panel.c
@@ -67,11 +67,6 @@ static int panel_bridge_attach(struct drm_bridge *bridge,
 	if (flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)
 		return 0;
 
-	if (!bridge->encoder) {
-		DRM_ERROR("Missing encoder\n");
-		return -ENODEV;
-	}
-
 	drm_connector_helper_add(connector,
 				 &panel_bridge_connector_helper_funcs);
 
-- 
2.43.0