IB/mlx4: Fix use of flow-counters for process_mad

	struct mlx4_ib_dev *dev = to_mdev(ibdev);

	const struct ib_mad *in_mad = (const struct ib_mad *)in;

	struct ib_mad *out_mad = (struct ib_mad *)out;

	enum rdma_link_layer link = rdma_port_get_link_layer(ibdev, port_num);

	if (WARN_ON_ONCE(in_mad_size != sizeof(*in_mad) ||

			 *out_mad_size != sizeof(*out_mad)))

		return IB_MAD_RESULT_FAILURE;

	switch (rdma_port_get_link_layer(ibdev, port_num)) {

	case IB_LINK_LAYER_INFINIBAND:

		if (!mlx4_is_slave(dev->dev))

	/* iboe_process_mad() which uses the HCA flow-counters to implement IB PMA

	 * queries, should be called only by VFs and for that specific purpose

	 */

	if (link == IB_LINK_LAYER_INFINIBAND) {

		if (mlx4_is_slave(dev->dev) &&

		    in_mad->mad_hdr.mgmt_class == IB_MGMT_CLASS_PERF_MGMT &&

		    in_mad->mad_hdr.attr_id == IB_PMA_PORT_COUNTERS)

			return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,

						in_grh, in_mad, out_mad);

		return ib_process_mad(ibdev, mad_flags, port_num, in_wc,

				      in_grh, in_mad, out_mad);

	case IB_LINK_LAYER_ETHERNET:

	}

	if (link == IB_LINK_LAYER_ETHERNET)

		return iboe_process_mad(ibdev, mad_flags, port_num, in_wc,

					in_grh, in_mad, out_mad);

	default:

	return -EINVAL;

}

}

static void send_handler(struct ib_mad_agent *agent,

			 struct ib_mad_send_wc *mad_send_wc)