netdev - [PATCH net-next] geneve: fix incorrect setting of UDP checksum flag

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Message-Id: <1493327513-23247-1-git-send-email-girish.moodalbail@oracle.com>
Date:   Thu, 27 Apr 2017 14:11:53 -0700
From:   Girish Moodalbail <girish.moodalbail@...cle.com>
To:     <davem@...emloft.net>
Cc:     <netdev@...r.kernel.org>, <pshelar@....org>
Subject: [PATCH net-next] geneve: fix incorrect setting of UDP checksum flag

Creating a geneve link with 'udpcsum' set results in a creation of link
for which UDP checksum will NOT be computed on outbound packets, as can
be seen below.

11: gen0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
    link/ether c2:85:27:b6:b4:15 brd ff:ff:ff:ff:ff:ff promiscuity 0
    geneve id 200 remote 192.168.13.1 dstport 6081 noudpcsum

Similarly, creating a link with 'noudpcsum' set results in a creation
of link for which UDP checksum will be computed on outbound packets.

Fixes: 9b4437a5b870 ("geneve: Unify LWT and netdev handling.")
Signed-off-by: Girish Moodalbail <girish.moodalbail@...cle.com>
---
 drivers/net/geneve.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index 7074b40..dec5d56 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -1244,7 +1244,7 @@ static int geneve_newlink(struct net *net, struct net_device *dev,
 		metadata = true;
 
 	if (data[IFLA_GENEVE_UDP_CSUM] &&
-	    !nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
+	    nla_get_u8(data[IFLA_GENEVE_UDP_CSUM]))
 		info.key.tun_flags |= TUNNEL_CSUM;
 
 	if (data[IFLA_GENEVE_UDP_ZERO_CSUM6_TX] &&
-- 
1.8.3.1