Use simplified is_vlan_dev function.
Signed-off-by: Joonwoo Park <joonwpark81@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
                        goto out;
 
                err = -EINVAL;
-               if (args.cmd != ADD_VLAN_CMD &&
-                   !(dev->priv_flags & IFF_802_1Q_VLAN))
+               if (args.cmd != ADD_VLAN_CMD && !is_vlan_dev(dev))
                        goto out;
        }
 
 
                dev->hard_start_xmit = vlan_dev_hard_start_xmit;
        }
 
-       if (real_dev->priv_flags & IFF_802_1Q_VLAN)
+       if (is_vlan_dev(real_dev))
                subclass = 1;
 
        lockdep_set_class_and_subclass(&dev->_xmit_lock,
 
        static const char fmt[] = "%30s %12lu\n";
        int i;
 
-       if (!(vlandev->priv_flags & IFF_802_1Q_VLAN))
+       if (!is_vlan_dev(vlandev))
                return 0;
 
        seq_printf(seq,