ice: Do not set LB_EN for prune switch rules

LB_EN for prune switch rules was causing all TX traffic
to loopback to the internal switch and dropped.  When
running bi-directional stress workloads with RDMA
the RDPU would hang blocking tx and rx traffic.

Signed-off-by: Christopher N Bednarz <christopher.n.bednarz@intel.com>
Reviewed-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Anirudh Venkataramanan <anirudh.venkataramanan@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index 48864b59036a..22a14e2da94f 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -643,7 +643,12 @@ static void ice_fill_sw_info(struct ice_hw *hw, struct ice_fltr_info *fi)
              fi->fltr_act == ICE_FWD_TO_VSI_LIST ||
              fi->fltr_act == ICE_FWD_TO_Q ||
              fi->fltr_act == ICE_FWD_TO_QGRP)) {
-                fi->lb_en = true;
+                /* Setting LB for prune actions will result in replicated
+                 * packets to the internal switch that will be dropped.
+                 */
+                if (fi->lkup_type != ICE_SW_LKUP_VLAN)
+                        fi->lb_en = true;
+
                 /* Set lan_en to TRUE if
                  * 1. The switch is a VEB AND
                  * 2