From: Andrey Grodzovsky <andrey.grodzov...@amd.com>
commit 5dff80bdce9e385af5716ed083f9e33e814484ab upstream.
On connector destruction call drm_dp_mst_topology_mgr_destroy
to release resources allocated in drm_dp_mst_topology_mgr_init.
Do it only if MST manager was initilized before otherwsie a crash
is seen on driver unload/device unplug.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
Signed-off-by: Andrey Grodzovsky <andrey.grodzov...@amd.com>
Acked-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Cc: sta...@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3956,6 +3956,13 @@ static void amdgpu_dm_connector_destroy(
struct amdgpu_device *adev = connector->dev->dev_private;
struct amdgpu_display_manager *dm = &adev->dm;
+ /*
+ * Call only if mst_mgr was iniitalized before since it's not done
+ * for all connector types.
+ */
+ if (aconnector->mst_mgr.dev)
+ drm_dp_mst_topology_mgr_destroy(&aconnector->mst_mgr);
+
#if defined(CONFIG_BACKLIGHT_CLASS_DEVICE) ||\
defined(CONFIG_BACKLIGHT_CLASS_DEVICE_MODULE)
