diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
index 0feeac52e4eb..9f40437ee252 100644
--- a/drivers/gpu/drm/drm_dp_mst_topology.c
+++ b/drivers/gpu/drm/drm_dp_mst_topology.c
@@ -3769,6 +3769,9 @@ int drm_dp_mst_topology_mgr_set_mst(struct drm_dp_mst_topology_mgr *mgr, bool ms
 		set_bit(0, &mgr->payload_mask);
 		mgr->vcpi_mask = 0;
 		mgr->payload_id_table_cleared = false;
+
+		memset(&mgr->down_rep_recv, 0, sizeof(mgr->down_rep_recv));
+		memset(&mgr->up_req_recv, 0, sizeof(mgr->up_req_recv));
 	}
 
 out_unlock: