linux-kernel - [PATCH 12/30] drm/bridge/analogix/anx6345: Cleanup on errors in anx6345_bridge

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Message-Id: <20210219215326.2227596-13-lyude@redhat.com>
Date:   Fri, 19 Feb 2021 16:53:08 -0500
From:   Lyude Paul <lyude@...hat.com>
To:     intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        amd-gfx@...ts.freedesktop.org, nouveau@...ts.freedesktop.org,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>,
        Jani Nikula <jani.nikula@...ux.intel.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Thomas Zimmermann <tzimmermann@...e.de>
Cc:     Andrzej Hajda <a.hajda@...sung.com>,
        Neil Armstrong <narmstrong@...libre.com>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...l.net>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Sam Ravnborg <sam@...nborg.org>, Torsten Duwe <duwe@....de>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Joe Perches <joe@...ches.com>, Icenowy Zheng <icenowy@...c.io>,
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 12/30] drm/bridge/analogix/anx6345: Cleanup on errors in anx6345_bridge_attach()

Another drive-by fix I found when fixing DP AUX adapter across the kernel
tree - make sure we don't leak resources (and by proxy-AUX adapters) on
failures in anx6345_bridge_attach() by unrolling on errors.

Signed-off-by: Lyude Paul <lyude@...hat.com>
---
 drivers/gpu/drm/bridge/analogix/analogix-anx6345.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
index 6258f16da0e8..aa6cda458eb9 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix-anx6345.c
@@ -550,7 +550,7 @@ static int anx6345_bridge_attach(struct drm_bridge *bridge,
 				 DRM_MODE_CONNECTOR_eDP);
 	if (err) {
 		DRM_ERROR("Failed to initialize connector: %d\n", err);
-		return err;
+		goto aux_unregister;
 	}
 
 	drm_connector_helper_add(&anx6345->connector,
@@ -562,16 +562,21 @@ static int anx6345_bridge_attach(struct drm_bridge *bridge,
 					   bridge->encoder);
 	if (err) {
 		DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
-		return err;
+		goto connector_cleanup;
 	}
 
 	err = drm_connector_register(&anx6345->connector);
 	if (err) {
 		DRM_ERROR("Failed to register connector: %d\n", err);
-		return err;
+		goto connector_cleanup;
 	}
 
 	return 0;
+connector_cleanup:
+	drm_connector_cleanup(&anx6345->connector);
+aux_unregister:
+	drm_dp_aux_unregister(&anx6345->aux);
+	return err;
 }
 
 static void anx6345_bridge_detach(struct drm_bridge *bridge)
-- 
2.29.2