[PATCH 2/2] net: vxlan: enable local checksum offload on HW_CSUM devices

[Edward Cree]

Signed-off-by: Edward Cree <ec...@solarflare.com>
---
 drivers/net/vxlan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 6369a57..c1660d6 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -1785,6 +1785,9 @@ static int vxlan_xmit_skb(struct rtable *rt, struct sock 
*sk, struct sk_buff *sk
        bool udp_sum = !!(vxflags & VXLAN_F_UDP_CSUM);
        int type = udp_sum ? SKB_GSO_UDP_TUNNEL_CSUM : SKB_GSO_UDP_TUNNEL;
        u16 hdrlen = sizeof(struct vxlanhdr);
+       /* Is device able to do the inner checksum? */
+       bool inner_csum = skb_dst(skb) && skb_dst(skb)->dev &&
+                               (skb_dst(skb)->dev->features & NETIF_F_HW_CSUM);
 
        if ((vxflags & VXLAN_F_REMCSUM_TX) &&
            skb->ip_summed == CHECKSUM_PARTIAL) {
@@ -1814,7 +1817,7 @@ static int vxlan_xmit_skb(struct rtable *rt, struct sock 
*sk, struct sk_buff *sk
        if (WARN_ON(!skb))
                return -ENOMEM;
 
-       skb = iptunnel_handle_offloads(skb, udp_sum, type);
+       skb = iptunnel_handle_offloads(skb, udp_sum && !inner_csum, type);
        if (IS_ERR(skb))
                return PTR_ERR(skb);
 
-- 
2.4.3

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