Just like i915 and nouveau, it's a good idea for us to hold a malloc
reference to the port here so that we never pass a freed pointer to any
of the DP MST helper functions.
Also, we stop unsetting aconnector->port in
dm_dp_destroy_mst_connector(). There's literally no point to that
assignment that I can see anyway.
Signed-off-by: Lyude Paul <lyude@xxxxxxxxxx>
Cc: Daniel Vetter <daniel@xxxxxxxx>
Cc: David Airlie <airlied@xxxxxxxxxx>
Cc: Jerry Zuo <Jerry.Zuo@xxxxxxx>
Cc: Harry Wentland <harry.wentland@xxxxxxx>
Cc: Juston Li <juston.li@xxxxxxxxx>
---
.../drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 5e7ca1f3a8d1..24632727e127 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -191,6 +191,7 @@ dm_dp_mst_connector_destroy(struct drm_connector *connector)
drm_encoder_cleanup(&amdgpu_encoder->base);
kfree(amdgpu_encoder);
drm_connector_cleanup(connector);
+ drm_dp_mst_put_port_malloc(amdgpu_dm_connector->port);
kfree(amdgpu_dm_connector);
}
@@ -363,7 +364,9 @@ dm_dp_add_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
amdgpu_dm_connector_funcs_reset(connector);
DRM_INFO("DM_MST: added connector: %p [id: %d] [master: %p]\n",
- aconnector, connector->base.id, aconnector->mst_port);
+ aconnector, connector->base.id, aconnector->mst_port);
+
+ drm_dp_mst_get_port_malloc(port);
DRM_DEBUG_KMS(":%d\n", connector->base.id);
@@ -379,12 +382,12 @@ static void dm_dp_destroy_mst_connector(struct drm_dp_mst_topology_mgr *mgr,
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
DRM_INFO("DM_MST: Disabling connector: %p [id: %d] [master: %p]\n",
- aconnector, connector->base.id, aconnector->mst_port);
+ aconnector, connector->base.id, aconnector->mst_port);
- aconnector->port = NULL;
if (aconnector->dc_sink) {
amdgpu_dm_update_freesync_caps(connector, NULL);
- dc_link_remove_remote_sink(aconnector->dc_link, aconnector->dc_sink);
+ dc_link_remove_remote_sink(aconnector->dc_link,
+ aconnector->dc_sink);
dc_sink_release(aconnector->dc_sink);
aconnector->dc_sink = NULL;
}
--
2.19.2
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