From: Mario Limonciello <mario.limonciello@amd.com>
Date: Tue, 15 Jul 2025 19:41:46 +0000 (-0500)
Subject: drm/amd/display: Only finalize atomic_obj if it was initialized
X-Git-Tag: v6.12.43~172
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=d2b6f313ac0060191a242e07f600a85d6f76c6b0;p=thirdparty%2Fkernel%2Fstable.git

drm/amd/display: Only finalize atomic_obj if it was initialized

[ Upstream commit b174084b3fe15ad1acc69530e673c1535d2e4f85 ]

[Why]
If amdgpu_dm failed to initalize before amdgpu_dm_initialize_drm_device()
completed then freeing atomic_obj will lead to list corruption.

[How]
Check if atomic_obj state is initialized before trying to free.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@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>
---

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 084d9ed325af6..33a3e5e28fbc3 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5223,7 +5223,8 @@ fail:
 
 static void amdgpu_dm_destroy_drm_device(struct amdgpu_display_manager *dm)
 {
-	drm_atomic_private_obj_fini(&dm->atomic_obj);
+	if (dm->atomic_obj.state)
+		drm_atomic_private_obj_fini(&dm->atomic_obj);
 }
 
 /******************************************************************************