From: Victor Lu victorchengchi.lu@amd.com

[ Upstream commit 8e92bb0fa75bca9a57e4aba2e36f67d8016a3053 ]

[why] An old dc_sink state is causing a memory leak because it is missing a dc_sink_release before a new dc_sink is assigned back to aconnector->dc_sink.

[how] Decrement the dc_sink refcount before reassigning it to a new dc_sink.

Signed-off-by: Victor Lu victorchengchi.lu@amd.com Reviewed-by: Rodrigo Siqueira Rodrigo.Siqueira@amd.com Acked-by: Anson Jacob Anson.Jacob@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 9284960d24b0a..13f963047766b 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -1417,8 +1417,10 @@ amdgpu_dm_update_connector_after_detect(struct amdgpu_dm_connector *aconnector) * TODO: check if we still need the S3 mode update workaround. * If yes, put it here. */ - if (aconnector->dc_sink) + if (aconnector->dc_sink) { amdgpu_dm_update_freesync_caps(connector, NULL); + dc_sink_release(aconnector->dc_sink); + }

aconnector->dc_sink = sink; dc_sink_retain(aconnector->dc_sink);