i40e: allow XPS with QoS enabled

Recently, the kernel gained support for enabling XPS and QoS at the
same time. Thus, we no longer need to worry about the number of
traffic classes when enabling XPS.
Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
Tested-by: NAndrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>

drivers/net/ethernet/intel/i40e/i40e_main.c

@@ -2879,23 +2879,18 @@ static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
  **/
 static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
 {
-	struct i40e_vsi *vsi = ring->vsi;
 	int cpu;
 
 	if (!ring->q_vector || !ring->netdev)
 		return;
 
-	if ((vsi->tc_config.numtc <= 1) &&
-	    !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, ring->state)) {
-		cpu = cpumask_local_spread(ring->q_vector->v_idx, -1);
-		netif_set_xps_queue(ring->netdev, get_cpu_mask(cpu),
-				    ring->queue_index);
-	}
+	/* We only initialize XPS once, so as not to overwrite user settings */
+	if (test_and_set_bit(__I40E_TX_XPS_INIT_DONE, ring->state))
+		return;
 
-	/* schedule our worker thread which will take care of
-	 * applying the new filter changes
-	 */
-	i40e_service_event_schedule(vsi->back);
+	cpu = cpumask_local_spread(ring->q_vector->v_idx, -1);
+	netif_set_xps_queue(ring->netdev, get_cpu_mask(cpu),
+			    ring->queue_index);
 }
 
 /**