ipv6/ndisc: join error paths

Signed-off-by: NIlpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/ipv6/ndisc.c

@@ -1538,13 +1538,10 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 	if (rt->rt6i_flags & RTF_GATEWAY) {
 		ND_PRINTK2(KERN_WARNING
 			   "ICMPv6 Redirect: destination is not a neighbour.\n");
-		dst_release(dst);
-		return;
-	}
-	if (!xrlim_allow(dst, 1*HZ)) {
-		dst_release(dst);
-		return;
+		goto release;
 	}
+	if (!xrlim_allow(dst, 1*HZ))
+		goto release;
 
 	if (dev->addr_len) {
 		read_lock_bh(&neigh->lock);
@@ -1570,8 +1567,7 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 		ND_PRINTK0(KERN_ERR
 			   "ICMPv6 Redirect: %s() failed to allocate an skb.\n",
 			   __func__);
-		dst_release(dst);
-		return;
+		goto release;
 	}
 
 	skb_reserve(buff, LL_RESERVED_SPACE(dev));
@@ -1631,6 +1627,10 @@ void ndisc_send_redirect(struct sk_buff *skb, struct neighbour *neigh,
 
 	if (likely(idev != NULL))
 		in6_dev_put(idev);
+	return;
+
+release:
+	dst_release(dst);
 }
 
 static void pndisc_redo(struct sk_buff *skb)