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Diffstat (limited to 'net')
-rw-r--r--net/ipv6/sit.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index 063560e2cb1a..cc24cefdb85c 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -1095,12 +1095,13 @@ tx_err:
static void ipip6_tunnel_bind_dev(struct net_device *dev)
{
+ struct ip_tunnel *tunnel = netdev_priv(dev);
+ int t_hlen = tunnel->hlen + sizeof(struct iphdr);
struct net_device *tdev = NULL;
- struct ip_tunnel *tunnel;
+ int hlen = LL_MAX_HEADER;
const struct iphdr *iph;
struct flowi4 fl4;
- tunnel = netdev_priv(dev);
iph = &tunnel->parms.iph;
if (iph->daddr) {
@@ -1123,14 +1124,15 @@ static void ipip6_tunnel_bind_dev(struct net_device *dev)
tdev = __dev_get_by_index(tunnel->net, tunnel->parms.link);
if (tdev && !netif_is_l3_master(tdev)) {
- int t_hlen = tunnel->hlen + sizeof(struct iphdr);
int mtu;
mtu = tdev->mtu - t_hlen;
if (mtu < IPV6_MIN_MTU)
mtu = IPV6_MIN_MTU;
WRITE_ONCE(dev->mtu, mtu);
+ hlen = tdev->hard_header_len + tdev->needed_headroom;
}
+ dev->needed_headroom = t_hlen + hlen;
}
static void ipip6_tunnel_update(struct ip_tunnel *t, struct ip_tunnel_parm *p,