netdev - [PATCH v2] geneve: remove use of internal IP header when calling IP_ECN

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Message-Id: <1442522094-876-1-git-send-email-linville@tuxdriver.com>
Date:	Thu, 17 Sep 2015 16:34:54 -0400
From:	"John W. Linville" <linville@...driver.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, Jesse Gross <jesse@...ira.com>,
	"John W. Linville" <linville@...driver.com>
Subject: [PATCH v2] geneve: remove use of internal IP header when calling IP_ECN_decapsulate

This seems to have been a "thinko".  IP_ECN_decapsulate needs info
from both internal and external headers.

Signed-off-by: John W. Linville <linville@...driver.com>
---
v2 -- ensure the collect_md path still calls IP_ECN_decapsulate

 drivers/net/geneve.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index da3259ce7c8d..549febac0579 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -126,6 +126,8 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
 	__be32 addr;
 	int err;
 
+	iph = ip_hdr(skb); /* outer IP header... */
+
 	if (gs->collect_md) {
 		static u8 zero_vni[3];
 
@@ -133,7 +135,6 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
 		addr = 0;
 	} else {
 		vni = gnvh->vni;
-		iph = ip_hdr(skb); /* Still outer IP header... */
 		addr = iph->saddr;
 	}
 
@@ -178,7 +179,6 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
 
 	skb_reset_network_header(skb);
 
-	iph = ip_hdr(skb); /* Now inner IP header... */
 	err = IP_ECN_decapsulate(iph, skb);
 
 	if (unlikely(err)) {
-- 
2.4.3

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