diff options
| author |   Xin Long <lucien.xin@gmail.com> | 2017-12-18 14:24:35 +0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2017-12-19 13:45:32 -0500 |
| commit | cfddd4c33c254954927942599d299b3865743146 (patch) | |
| tree | 72cf144a6cb4d52630770ddbbdc3c23a615d022d /net/ipv4/ip_gre.c | |
| parent | vxlan: update skb dst pmtu on tx path (diff) | |
| download | linux-dev-cfddd4c33c254954927942599d299b3865743146.tar.xz linux-dev-cfddd4c33c254954927942599d299b3865743146.zip | |
ip_gre: remove the incorrect mtu limit for ipgre tap
ipgre tap driver calls ether_setup(), after commit 61e84623ace3
("net: centralize net_device min/max MTU checking"), the range
of mtu is [min_mtu, max_mtu], which is [68, 1500] by default.
It causes the dev mtu of the ipgre tap device to not be greater
than 1500, this limit value is not correct for ipgre tap device.
Besides, it's .change_mtu already does the right check. So this
patch is just to set max_mtu as 0, and leave the check to it's
.change_mtu.
Fixes: 61e84623ace3 ("net: centralize net_device min/max MTU checking")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 9c1735632c8c..45ffd3d045d2 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1310,6 +1310,7 @@ static const struct net_device_ops erspan_netdev_ops = { static void ipgre_tap_setup(struct net_device *dev) { ether_setup(dev); + dev->max_mtu = 0; dev->netdev_ops = &gre_tap_netdev_ops; dev->priv_flags &= ~IFF_TX_SKB_SHARING; dev->priv_flags |= IFF_LIVE_ADDR_CHANGE; |