sunvnet: use icmp_ndo_send helper

commit 67c9a7e1e3ac491b5df018803639addc36f154ba upstream.

Because sunvnet is calling icmp from network device context, it should use
the ndo helper so that the rate limiting applies correctly. While we're
at it, doing the additional route lookup before calling icmp_ndo_send is
superfluous, since this is the job of the icmp code in the first place.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/net/ethernet/sun/sunvnet_common.c b/drivers/net/ethernet/sun/sunvnet_common.c
index baa3088b475c758f3cbcf17bdf7cb0e222ba2caf..59fc14b58c8389638f2749a487e85bc78f495e86 100644 (file)
--- a/drivers/net/ethernet/sun/sunvnet_common.c
+++ b/drivers/net/ethernet/sun/sunvnet_common.c
@@ -1353,27 +1353,12 @@ sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
                if (vio_version_after_eq(&port->vio, 1, 3))
                        localmtu -= VLAN_HLEN;
 
-               if (skb->protocol == htons(ETH_P_IP)) {
-                       struct flowi4 fl4;
-                       struct rtable *rt = NULL;
-
-                       memset(&fl4, 0, sizeof(fl4));
-                       fl4.flowi4_oif = dev->ifindex;
-                       fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos);
-                       fl4.daddr = ip_hdr(skb)->daddr;
-                       fl4.saddr = ip_hdr(skb)->saddr;
-
-                       rt = ip_route_output_key(dev_net(dev), &fl4);
-                       if (!IS_ERR(rt)) {
-                               skb_dst_set(skb, &rt->dst);
-                               icmp_send(skb, ICMP_DEST_UNREACH,
-                                         ICMP_FRAG_NEEDED,
-                                         htonl(localmtu));
-                       }
-               }
+               if (skb->protocol == htons(ETH_P_IP))
+                       icmp_ndo_send(skb, ICMP_DEST_UNREACH, ICMP_FRAG_NEEDED,
+                                     htonl(localmtu));
 #if IS_ENABLED(CONFIG_IPV6)
                else if (skb->protocol == htons(ETH_P_IPV6))
-                       icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
+                       icmpv6_ndo_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
 #endif
                goto out_dropped;
        }