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

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Date: Sat, 11 May 2024 20:42:38 +0800
From: Sui Jingfeng <sui.jingfeng@...ux.dev>
To: Maxime Ripard <mripard@...nel.org>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>,
	Neil Armstrong <neil.armstrong@...aro.org>,
	Robert Foss <rfoss@...nel.org>,
	Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
	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,
	Sui Jingfeng <sui.jingfeng@...ux.dev>
Subject: [PATCH] drm/bridge: Remove a small useless code snippet

Because the check on the non-existence (encoder == NULL) has already been
done in the implementation of drm_bridge_attach() function, and
drm_bridge_attach() is called earlier. The driver won't get to check point
even if drm_bridge_attach() fails for some reasons, as it will clear the
bridge->encoder to NULL and return a negective error code.

Therefore, there is no need to check another again. Remove the redundant
codes at the later.

Signed-off-by: Sui Jingfeng <sui.jingfeng@...ux.dev>
---
 drivers/gpu/drm/bridge/simple-bridge.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/drivers/gpu/drm/bridge/simple-bridge.c b/drivers/gpu/drm/bridge/simple-bridge.c
index 28376d0ecd09..3caa918ac2e0 100644
--- a/drivers/gpu/drm/bridge/simple-bridge.c
+++ b/drivers/gpu/drm/bridge/simple-bridge.c
@@ -116,11 +116,6 @@ static int simple_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(&sbridge->connector,
 				 &simple_bridge_con_helper_funcs);
 	ret = drm_connector_init_with_ddc(bridge->dev, &sbridge->connector,
-- 
2.43.0