vti4: Don't override MTU passed on link creation via IFLA_MTU

[ Upstream commit 03080e5ec72740c1a62e6730f2a5f3f114f11b19 ]

Don't hardcode a MTU value on vti tunnel initialization,
ip_tunnel_newlink() is able to deal with this already. See also
commit ffc2b6ee4174 ("ip_gre: fix IFLA_MTU ignored on NEWLINK").

Fixes: 1181412c1a67 ("net/ipv4: VTI support new module for ip_vti.")
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Acked-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv4/ip_vti.c b/net/ipv4/ip_vti.c
index 00d4371..5c5699c 100644 (file)
--- a/net/ipv4/ip_vti.c
+++ b/net/ipv4/ip_vti.c
@@ -396,7 +396,6 @@ static int vti_tunnel_init(struct net_device *dev)
        memcpy(dev->dev_addr, &iph->saddr, 4);
        memcpy(dev->broadcast, &iph->daddr, 4);
 
-       dev->mtu                = ETH_DATA_LEN;
        dev->flags              = IFF_NOARP;
        dev->addr_len           = 4;
        dev->features           |= NETIF_F_LLTX;