i40e: Clarify steps in MAC/VLAN filters initialization routine

This patch clarifies the reason for removal of automatically
firmware-generated filter and explicit addition of filter which
accepts frames with any VLAN id.

Change-ID: Iabf180b6d61c4d8a36d3bcf8457c377a6f2aca0e
Signed-off-by: Filip Sadowski <filip.sadowski@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 e577ff8a9c76dd3314d0dd93071b47f8775fd164..414685c683d709d83a564634edfe7b0a6c5d95d2 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_main.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_main.c
@@ -9461,10 +9461,10 @@ static int i40e_config_netdev(struct i40e_vsi *vsi)
        if (vsi->type == I40E_VSI_MAIN) {
                SET_NETDEV_DEV(netdev, &pf->pdev->dev);
                ether_addr_copy(mac_addr, hw->mac.perm_addr);
-               /* The following steps are necessary to prevent reception
-                * of tagged packets - some older NVM configurations load a
-                * default a MAC-VLAN filter that accepts any tagged packet
-                * which must be replaced by a normal filter.
+               /* The following steps are necessary to properly keep track of
+                * MAC-VLAN filters loaded into firmware - first we remove
+                * filter that is automatically generated by firmware and then
+                * add new filter both to the driver hash table and firmware.
                 */
                i40e_rm_default_mac_filter(vsi, mac_addr);
                spin_lock_bh(&vsi->mac_filter_hash_lock);