i40e: Retain MAC filters when changing port VLAN

We were already taking care to retain the MAC filter list when deleting a
port VLAN.  Take some additional care to retain the MAC filter list when
changing a port VLAN.

Change-ID: Iacf9599ea24ecb4dca8e419aacaf4b58ca361a9c
Signed-off-by: Greg Rose <gregory.v.rose@intel.com>
Signed-off-by: Catherine Sullivan <catherine.sullivan@intel.com>
Tested-by: Sibai Li <sibai.li@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index b27b2f59ea82..982eef042577 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2128,11 +2128,15 @@ int i40e_ndo_set_vf_port_vlan(struct net_device *netdev,
 
         /* Check for condition where there was already a port VLAN ID
          * filter set and now it is being deleted by setting it to zero.
+         * Additionally check for the condition where there was a port
+         * VLAN but now there is a new and different port VLAN being set.
          * Before deleting all the old VLAN filters we must add new ones
          * with -1 (I40E_VLAN_ANY) or otherwise we're left with all our
          * MAC addresses deleted.
          */
-        if (!(vlan_id || qos) && vsi->info.pvid)
+        if ((!(vlan_id || qos) ||
+            (vlan_id | qos) != le16_to_cpu(vsi->info.pvid)) &&
+            vsi->info.pvid)
                 ret = i40e_vsi_add_vlan(vsi, I40E_VLAN_ANY);
 
         if (vsi->info.pvid) {