On 2020-10-15 11:02 p.m., Alex Deucher wrote:
On Wed, Oct 14, 2020 at 1:25 PM Andrey Grodzovsky
<andrey.grodzovsky@xxxxxxx> wrote:
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 initialized before otherwsie a crash
is seen on driver unload/device unplug.
Not really an mst expert, but this seems to match what i915 and
nouveau do. Series is:
Acked-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@xxxxxxx>
Looks reasonable to me. Untested, however.
Reviewed-by: Nicholas Kazlauskas <nicholas.kazlauskas@xxxxxxx>
Regards,
Nicholas Kazlauskas
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 +++++++
1 file changed, 7 insertions(+)
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 a72447d..64799c4 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -5170,6 +5170,13 @@ static void amdgpu_dm_connector_destroy(struct drm_connector *connector)
struct amdgpu_device *adev = drm_to_adev(connector->dev);
struct amdgpu_display_manager *dm = &adev->dm;
+ /*
+ * Call only if mst_mgr was initialized 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)
--
2.7.4
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