Merge branch 'x86/hyperv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Topic branch for stable KVM clockource under Hyper-V.

Thanks to Christoffer Dall for resolving the ARM conflict.

1 files changed, 17 insertions, 13 deletions

diff --git a/net/ipv6/ip6_tunnel.c b/net/ipv6/ip6_tunnel.c
index db84f523656d..1ee5584c3555 100644
--- a/net/ipv6/ip6_tunnel.c
+++ b/net/ipv6/ip6_tunnel.c
@@ -642,8 +642,7 @@ ip4ip6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 		if (rel_info > dst_mtu(skb_dst(skb2)))
 			goto out;
 
-		skb_dst(skb2)->ops->update_pmtu(skb_dst(skb2), NULL, skb2,
-						rel_info);
+		skb_dst_update_pmtu(skb2, rel_info);
 	}
 
 	icmp_send(skb2, rel_type, rel_code, htonl(rel_info));
@@ -1074,10 +1073,11 @@ int ip6_tnl_xmit(struct sk_buff *skb, struct net_device *dev, __u8 dsfield,
 			memcpy(&fl6->daddr, addr6, sizeof(fl6->daddr));
 			neigh_release(neigh);
 		}
-	} else if (!(t->parms.flags &
-		     (IP6_TNL_F_USE_ORIG_TCLASS | IP6_TNL_F_USE_ORIG_FWMARK))) {
-		/* enable the cache only only if the routing decision does
-		 * not depend on the current inner header value
+	} else if (t->parms.proto != 0 && !(t->parms.flags &
+					    (IP6_TNL_F_USE_ORIG_TCLASS |
+					     IP6_TNL_F_USE_ORIG_FWMARK))) {
+		/* enable the cache only if neither the outer protocol nor the
+		 * routing decision depends on the current inner header value
 		 */
 		use_cache = true;
 	}
@@ -1123,10 +1123,14 @@ route_lookup:
 		max_headroom += 8;
 		mtu -= 8;
 	}
-	if (mtu < IPV6_MIN_MTU)
-		mtu = IPV6_MIN_MTU;
-	if (skb_dst(skb) && !t->parms.collect_md)
-		skb_dst(skb)->ops->update_pmtu(skb_dst(skb), NULL, skb, mtu);
+	if (skb->protocol == htons(ETH_P_IPV6)) {
+		if (mtu < IPV6_MIN_MTU)
+			mtu = IPV6_MIN_MTU;
+	} else if (mtu < 576) {
+		mtu = 576;
+	}
+
+	skb_dst_update_pmtu(skb, mtu);
 	if (skb->len - t->tun_hlen - eth_hlen > mtu && !skb_is_gso(skb)) {
 		*pmtu = mtu;
 		err = -EMSGSIZE;
@@ -1671,11 +1675,11 @@ int ip6_tnl_change_mtu(struct net_device *dev, int new_mtu)
 {
 	struct ip6_tnl *tnl = netdev_priv(dev);
 
-	if (tnl->parms.proto == IPPROTO_IPIP) {
-		if (new_mtu < ETH_MIN_MTU)
+	if (tnl->parms.proto == IPPROTO_IPV6) {
+		if (new_mtu < IPV6_MIN_MTU)
 			return -EINVAL;
 	} else {
-		if (new_mtu < IPV6_MIN_MTU)
+		if (new_mtu < ETH_MIN_MTU)
 			return -EINVAL;
 	}
 	if (new_mtu > 0xFFF8 - dev->hard_header_len)