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 robert.foss@linaro.org Link: https://patchwork.freedesktop.org/patch/msgid/20210219215326.2227596-10-lyud... 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 a5a690dd44c2..176ad7a7756e 100644 --- a/drivers/gpu/drm/bridge/analogix-anx78xx.c +++ b/drivers/gpu/drm/bridge/analogix-anx78xx.c @@ -1038,7 +1038,7 @@ 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, @@ -1050,16 +1050,21 @@ 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