vlan: add helper which can be called to see if device is used by vlan

[karo-tx-linux.git] / net / 8021q / vlan_core.c

diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 8ca533c95de0346f181c1acd067a787c20a49f62..b258da88f6756d4f3ad6d52c992f86fb5a23a93d 100644 (file)
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -368,3 +368,9 @@ void vlan_vids_del_by_dev(struct net_device *dev,
                vlan_vid_del(dev, vid_info->vid);
 }
 EXPORT_SYMBOL(vlan_vids_del_by_dev);
+
+bool vlan_uses_dev(const struct net_device *dev)
+{
+       return rtnl_dereference(dev->vlan_info) ? true : false;
+}
+EXPORT_SYMBOL(vlan_uses_dev);