drm/dp/mst: Always clear proposed vcpi table for port.

Not clearing mst manager's proposed vcpis table for destroyed connectors when the manager is stopped leaves it pointing to unrefernced memory, this causes pagefault when the manager is restarted when plugging back a branch.

Fixes: 91a25e463130 ("drm/dp/mst: deallocate payload on port destruction")
Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Reviewed-by: Lyude <cpaul@redhat.com>
Cc: stable@vger.kernel.org
Cc: Mykola Lysenko <Mykola.Lysenko@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index a13edf5..6537908 100644 (file)
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -2927,11 +2927,9 @@ static void drm_dp_destroy_connector_work(struct work_struct *work)
                drm_dp_port_teardown_pdt(port, port->pdt);
 
                if (!port->input && port->vcpi.vcpi > 0) {
-                       if (mgr->mst_state) {
-                               drm_dp_mst_reset_vcpi_slots(mgr, port);
-                               drm_dp_update_payload_part1(mgr);
-                               drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi);
-                       }
+                       drm_dp_mst_reset_vcpi_slots(mgr, port);
+                       drm_dp_update_payload_part1(mgr);
+                       drm_dp_mst_put_payload_id(mgr, port->vcpi.vcpi);
                }
 
                kref_put(&port->kref, drm_dp_free_mst_port);