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authorTom Goff <thomas.goff@boeing.com>2009-08-14 16:33:56 -0700
committerDavid S. Miller <davem@davemloft.net>2009-08-14 16:41:18 -0700
commit8cdb045632e5ee22854538619ac6f150eb0a4894 (patch)
treeece387e77861a103ca6cc5b7d501e4c69a0399dc
parent7c1d15d736687057f4dc6e51fbf44b6f6e4320cb (diff)
gre: Fix MTU calculation for bound GRE tunnels
The GRE header length should be subtracted when the tunnel MTU is calculated. This just corrects for the associativity change introduced by commit 42aa916265d740d66ac1f17290366e9494c884c2 ("gre: Move MTU setting out of ipgre_tunnel_bind_dev"). Signed-off-by: Tom Goff <thomas.goff@boeing.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/ipv4/ip_gre.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index cb4a0f4bd5e..82c11dd10a6 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -951,7 +951,7 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev)
addend += 4;
}
dev->needed_headroom = addend + hlen;
- mtu -= dev->hard_header_len - addend;
+ mtu -= dev->hard_header_len + addend;
if (mtu < 68)
mtu = 68;