From: Jacob Keller <jacob.e.keller@intel.com>
Date: Thu, 7 Sep 2017 08:05:53 -0400
Subject: i40e: allow XPS with QoS enabled
Patch-mainline: v4.15-rc1
Git-commit: 6f853d4f8e93eeace504b021e05dfdbeb4d3b40f
References: bsc#1101816 FATE#325147 FATE#325149

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: Jacob Keller <jacob.e.keller@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/intel/i40e/i40e_main.c |   17 ++++++-----------
 1 file changed, 6 insertions(+), 11 deletions(-)

--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -2879,23 +2879,18 @@ static void i40e_vsi_free_rx_resources(s
  **/
 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);
 }
 
 /**