From: Haishuang Yan yanhaishuang@cmss.chinamobile.com
[ Upstream commit 4123f637a5129470ff9d3cb00a5a4e213f2e15cc ]
ip6erspan 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 erspan device to not be greater than 1500, this limit value is not correct for ip6erspan tap device.
Fixes: 61e84623ace3 ("net: centralize net_device min/max MTU checking") Signed-off-by: Haishuang Yan yanhaishuang@cmss.chinamobile.com Acked-by: William Tu u9012063@gmail.com Signed-off-by: Jakub Kicinski jakub.kicinski@netronome.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv6/ip6_gre.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index b3515a4f1303..1f2d0022ba6f 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -2218,6 +2218,7 @@ static void ip6erspan_tap_setup(struct net_device *dev) { ether_setup(dev);
+ dev->max_mtu = 0; dev->netdev_ops = &ip6erspan_netdev_ops; dev->needs_free_netdev = true; dev->priv_destructor = ip6gre_dev_free;