ip_fragment: fix subtracting PPPOE_SES_HLEN from mtu twice
6c79bf0f2440fd250c8fce8d9b82fcf03d4e8350 subtracts PPPOE_SES_HLEN from mtu at
the front of ip_fragment(). So the later subtraction should be removed. The
MTU of 802.1q is also 1500, so MTU should not be changed.
Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: Bart De Schuymer <bdschuym@pandora.bo>
----
net/ipv4/ip_output.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
Signed-off-by: Bart De Schuymer <bdschuym@pandora.bo>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c
index 6652bd9..04b6989 100644
--- a/net/ipv4/ip_output.c
+++ b/net/ipv4/ip_output.c
@@ -446,7 +446,7 @@
int ptr;
struct net_device *dev;
struct sk_buff *skb2;
- unsigned int mtu, hlen, left, len, ll_rs, pad;
+ unsigned int mtu, hlen, left, len, ll_rs;
int offset;
__be16 not_last_frag;
struct rtable *rt = skb_rtable(skb);
@@ -585,9 +585,7 @@
/* for bridged IP traffic encapsulated inside f.e. a vlan header,
* we need to make room for the encapsulating header
*/
- pad = nf_bridge_pad(skb);
- ll_rs = LL_RESERVED_SPACE_EXTRA(rt->dst.dev, pad);
- mtu -= pad;
+ ll_rs = LL_RESERVED_SPACE_EXTRA(rt->dst.dev, nf_bridge_pad(skb));
/*
* Fragment the datagram.