[PATCH AUTOSEL 4.19 13/35] drm/bridge/analogix/anx78xx: Cleanup on error in anx78xx_bridge_attach()
From: Sasha Levin <sashal@kernel.org>
Date: 2021-05-03 17:00:36
Also in:
dri-devel, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for bridge chips, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Andrzej Hajda, Neil Armstrong, Robert Foss, Linus Torvalds
From: Lyude Paul <lyude@redhat.com> [ Upstream commit 212ee8db84600f7b279b8645c62a112bff310995 ] Just another issue I noticed while correcting usages of drm_dp_aux_init()/drm_dp_aux_register() around the tree. If any of the steps in anx78xx_bridge_attach() fail, we end up leaking resources. So, let's fix that (and fix leaking a DP AUX adapter in the process) by unrolling on errors. Signed-off-by: Lyude Paul <lyude@redhat.com> Reviewed-by: Robert Foss <redacted> Link: https://patchwork.freedesktop.org/patch/msgid/20210219215326.2227596-10-lyude@redhat.com Signed-off-by: Sasha Levin <sashal@kernel.org> --- drivers/gpu/drm/bridge/analogix-anx78xx.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix-anx78xx.c
index 9fa1610b237a..84a261c1b54f 100644
--- a/drivers/gpu/drm/bridge/analogix-anx78xx.c
+++ b/drivers/gpu/drm/bridge/analogix-anx78xx.c@@ -1036,7 +1036,7 @@ static int anx78xx_bridge_attach(struct drm_bridge *bridge) DRM_MODE_CONNECTOR_DisplayPort); if (err) { DRM_ERROR("Failed to initialize connector: %d\n", err); - return err; + goto aux_unregister; } drm_connector_helper_add(&anx78xx->connector,
@@ -1048,16 +1048,21 @@ static int anx78xx_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(&anx78xx->connector); if (err) { DRM_ERROR("Failed to register connector: %d\n", err); - return err; + goto connector_cleanup; } return 0; +connector_cleanup: + drm_connector_cleanup(&anx78xx->connector); +aux_unregister: + drm_dp_aux_unregister(&anx78xx->aux); + return err; } static enum drm_mode_status
--
2.30.2