net: unset IFF_XMIT_DST_RELEASE in ipgre_tunnel_setup()

ipgre_tunnel_xmit() might need skb->dst, so tell dev_hard_start_xmit()
to no release it.

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 0 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index e62510d5ea5a..77436e2732eb 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -1238,6 +1238,7 @@ static void ipgre_tunnel_setup(struct net_device *dev)
         dev->iflink             = 0;
         dev->addr_len           = 4;
         dev->features           |= NETIF_F_NETNS_LOCAL;
+        dev->priv_flags         &= ~IFF_XMIT_DST_RELEASE;
 }
 
 static int ipgre_tunnel_init(struct net_device *dev)