vxlan: Enable checksum unnecessary conversions for vxlan/UDP sockets

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 67527f3..53c3ec1 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -2370,6 +2370,8 @@
 	/* Disable multicast loopback */
 	inet_sk(sock->sk)->mc_loop = 0;
 
+	udp_set_convert_csum(sock->sk, true);
+
 	return sock;
 }