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vlan: make vlan_dev_real_dev work over stacked vlans
Sometimes we might have stacked vlans on top of each other, and we're interested in the first non-vlan real device on the path, so transform vlan_dev_real_dev to go over the stacked vlans and extract the first non-vlan device. Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com> Signed-off-by: Veaceslav Falico <vfalico@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -91,7 +91,12 @@ EXPORT_SYMBOL(__vlan_find_dev_deep);
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struct net_device *vlan_dev_real_dev(const struct net_device *dev)
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{
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return vlan_dev_priv(dev)->real_dev;
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struct net_device *ret = vlan_dev_priv(dev)->real_dev;
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while (is_vlan_dev(ret))
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ret = vlan_dev_priv(ret)->real_dev;
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return ret;
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}
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EXPORT_SYMBOL(vlan_dev_real_dev);
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