1 files changed, 18 insertions, 11 deletions

diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c
index a2fc7b961dbc..04c8b69fd426 100644
--- a/net/ipv4/arp.c
+++ b/net/ipv4/arp.c
@@ -1143,6 +1143,23 @@ static int arp_req_get(struct arpreq *r, struct net_device *dev)
         return err;
 }
 
+int arp_invalidate(struct net_device *dev, __be32 ip)
+{
+        struct neighbour *neigh = neigh_lookup(&arp_tbl, &ip, dev);
+        int err = -ENXIO;
+
+        if (neigh) {
+                if (neigh->nud_state & ~NUD_NOARP)
+                        err = neigh_update(neigh, NULL, NUD_FAILED,
+                                           NEIGH_UPDATE_F_OVERRIDE|
+                                           NEIGH_UPDATE_F_ADMIN);
+                neigh_release(neigh);
+        }
+
+        return err;
+}
+EXPORT_SYMBOL(arp_invalidate);
+
 static int arp_req_delete_public(struct net *net, struct arpreq *r,
                 struct net_device *dev)
 {
@@ -1163,7 +1180,6 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
 {
         int err;
         __be32 ip;
-        struct neighbour *neigh;
 
         if (r->arp_flags & ATF_PUBL)
                 return arp_req_delete_public(net, r, dev);
@@ -1181,16 +1197,7 @@ static int arp_req_delete(struct net *net, struct arpreq *r,
                 if (!dev)
                         return -EINVAL;
         }
-        err = -ENXIO;
-        neigh = neigh_lookup(&arp_tbl, &ip, dev);
-        if (neigh) {
-                if (neigh->nud_state & ~NUD_NOARP)
-                        err = neigh_update(neigh, NULL, NUD_FAILED,
-                                           NEIGH_UPDATE_F_OVERRIDE|
-                                           NEIGH_UPDATE_F_ADMIN);
-                neigh_release(neigh);
-        }
-        return err;
+        return arp_invalidate(dev, ip);
 }
 
 /*