ConnectX HCAs support the IB_MGMT_CLASS_CONG_MGMT management class, so
process MADs of this class through the MAD_IFC firmware command.
Signed-off-by: Eli Cohen <eli@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
                        return IB_MAD_RESULT_SUCCESS;
        } else if (in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT ||
                   in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS1   ||
-                  in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2) {
+                  in_mad->mad_hdr.mgmt_class == MLX4_IB_VENDOR_CLASS2   ||
+                  in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_CONG_MGMT) {
                if (in_mad->mad_hdr.method  != IB_MGMT_METHOD_GET &&
                    in_mad->mad_hdr.method  != IB_MGMT_METHOD_SET)
                        return IB_MAD_RESULT_SUCCESS;