i40e: remove code to handle dev_addr specially

The netdev->dev_addr MAC filter already exists in the
MAC/VLAN hash table, as it is added when we configure
the netdev in i40e_configure_netdev. Because we already
know that this address will be updated in the
hash_for_each loops, we do not need to handle it
specially. This removes duplicate code and simplifies
the i40e_vsi_add_vlan and i40e_vsi_kill_vlan functions.
Because we know these filters must be part of the
MAC/VLAN hash table, this should not have any functional
impact on what filters are included and is merely a code
simplification.

Change-ID: I5e648302dbdd7cc29efc6d203b7019c11f0b5705
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>

diff --git a/drivers/net/ethernet/intel/i40e/i40e_main.c b/drivers/net/ethernet/intel/i40e/i40e_main.c
index c467cc4..ae4a2b2 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -2515,17 +2515,6 @@ int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
        /* Locked once because all functions invoked below iterates list*/
        spin_lock_bh(&vsi->mac_filter_hash_lock);
 
-       if (vsi->netdev) {
-               add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid);
-               if (!add_f) {
-                       dev_info(&vsi->back->pdev->dev,
-                                "Could not add vlan filter %d for %pM\n",
-                                vid, vsi->netdev->dev_addr);
-                       spin_unlock_bh(&vsi->mac_filter_hash_lock);
-                       return -ENOMEM;
-               }
-       }
-
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->state == I40E_FILTER_REMOVE)
                        continue;
@@ -2539,28 +2528,14 @@ int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
                }
        }
 
-       /* Now if we add a vlan tag, make sure to check if it is the first
-        * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
-        * with 0, so we now accept untagged and specified tagged traffic
-        * (and not all tags along with untagged)
+       /* When we add a new VLAN filter, we need to make sure that all existing
+        * filters which are marked as vid=-1 (I40E_VLAN_ANY) are converted to
+        * vid=0. The simplest way is just search for all filters marked as
+        * vid=-1 and replace them with vid=0. This converts all filters that
+        * were marked to receive all traffic (tagged or untagged) into
+        * filters to receive only untagged traffic, so that we don't receive
+        * tagged traffic for VLANs which we have not configured.
         */
-       if (vid > 0 && vsi->netdev) {
-               del_f = i40e_find_filter(vsi, vsi->netdev->dev_addr,
-                                        I40E_VLAN_ANY);
-               if (del_f) {
-                       __i40e_del_filter(vsi, del_f);
-                       add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0);
-                       if (!add_f) {
-                               dev_info(&vsi->back->pdev->dev,
-                                        "Could not add filter 0 for %pM\n",
-                                        vsi->netdev->dev_addr);
-                               spin_unlock_bh(&vsi->mac_filter_hash_lock);
-                               return -ENOMEM;
-                       }
-               }
-       }
-
-       /* Do not assume that I40E_VLAN_ANY should be reset to VLAN 0 */
        if (vid > 0 && !vsi->info.pvid) {
                hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                        if (f->state == I40E_FILTER_REMOVE)
@@ -2597,7 +2572,6 @@ int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
  **/
 void i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
 {
-       struct net_device *netdev = vsi->netdev;
        struct i40e_mac_filter *f;
        struct hlist_node *h;
        int bkt;
@@ -2605,9 +2579,6 @@ void i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
        /* Locked once because all functions invoked below iterates list */
        spin_lock_bh(&vsi->mac_filter_hash_lock);
 
-       if (vsi->netdev)
-               i40e_del_filter(vsi, netdev->dev_addr, vid);
-
        hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
                if (f->vlan == vid)
                        __i40e_del_filter(vsi, f);