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drm/amd/display: Fix drm_edid leak in amdgpu_dm 

[WHAT]
When a sink is connected, aconnector->drm_edid was overwritten without
freeing the previous allocation, causing a memory leak on resume.

[HOW]
Free the previous drm_edid before updating it.

Reviewed-by: Roman Li <roman.li@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Signed-off-by: Chuanyu Tseng <chuanyu.tseng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 52024a94e7111366141cfc5d888b2ef011f879e5)
Cc: stable@vger.kernel.org
This commit is contained in:
Alex Hung 2026-03-09 11:16:08 -06:00 committed by Alex Deucher
parent 14b81abe7b
commit 37c2caa167
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -3909,8 +3909,9 @@ void amdgpu_dm_update_connector_after_detect(
aconnector->dc_sink = sink;
dc_sink_retain(aconnector->dc_sink);
drm_edid_free(aconnector->drm_edid);
aconnector->drm_edid = NULL;
if (sink->dc_edid.length == 0) {
aconnector->drm_edid = NULL;
hdmi_cec_unset_edid(aconnector);
if (aconnector->dc_link->aux_mode) {
drm_dp_cec_unset_edid(&aconnector->dm_dp_aux.aux);