i40e: handle setting administratively set MAC address back to zero

When an administratively set MAC was previously set and should now be
switched back to 00:00:00:00:00:00 the pf_set_mac flag did not get
toggled back to false.
As a result VFs were still treated as if an administratively set MAC was
present.

Signed-off-by: Stefan Assmann <sassmann@kpanic.de>
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_virtchnl_pf.c b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
index 2e261bb..979110d 100644 (file)
--- a/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_virtchnl_pf.c
@@ -2762,7 +2762,6 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
 
        spin_unlock_bh(&vsi->mac_filter_hash_lock);
 
-       dev_info(&pf->pdev->dev, "Setting MAC %pM on VF %d\n", mac, vf_id);
        /* program mac filter */
        if (i40e_sync_vsi_filters(vsi)) {
                dev_err(&pf->pdev->dev, "Unable to program ucast filters\n");
@@ -2770,7 +2769,16 @@ int i40e_ndo_set_vf_mac(struct net_device *netdev, int vf_id, u8 *mac)
                goto error_param;
        }
        ether_addr_copy(vf->default_lan_addr.addr, mac);
-       vf->pf_set_mac = true;
+
+       if (is_zero_ether_addr(mac)) {
+               vf->pf_set_mac = false;
+               dev_info(&pf->pdev->dev, "Removing MAC on VF %d\n", vf_id);
+       } else {
+               vf->pf_set_mac = true;
+               dev_info(&pf->pdev->dev, "Setting MAC %pM on VF %d\n",
+                        mac, vf_id);
+       }
+
        /* Force the VF driver stop so it has to reload with new MAC address */
        i40e_vc_disable_vf(pf, vf);
        dev_info(&pf->pdev->dev, "Reload the VF driver to make this change effective.\n");