netdev - [PATCH 2/7] gre6: Call skb_checksum_simple

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Message-ID: <alpine.DEB.2.02.1405071642400.874@tomh.mtv.corp.google.com>
Date:	Wed, 7 May 2014 16:51:57 -0700 (PDT)
From:	Tom Herbert <therbert@...gle.com>
To:	davem@...emloft.net, netdev@...r.kernel.org
Subject: [PATCH 2/7] gre6: Call skb_checksum_simple_validate

Use skb_checksum_simple_validate to verify checksum.

Signed-off-by: Tom Herbert <therbert@...gle.com>
---
 net/ipv6/ip6_gre.c | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c
index 75277b7..3873181 100644
--- a/net/ipv6/ip6_gre.c
+++ b/net/ipv6/ip6_gre.c
@@ -468,17 +468,7 @@ static int ip6gre_rcv(struct sk_buff *skb)
 			goto drop;
 
 		if (flags&GRE_CSUM) {
-			switch (skb->ip_summed) {
-			case CHECKSUM_COMPLETE:
-				csum = csum_fold(skb->csum);
-				if (!csum)
-					break;
-				/* fall through */
-			case CHECKSUM_NONE:
-				skb->csum = 0;
-				csum = __skb_checksum_complete(skb);
-				skb->ip_summed = CHECKSUM_COMPLETE;
-			}
+			csum = skb_checksum_simple_validate(skb);
 			offset += 4;
 		}
 		if (flags&GRE_KEY) {
-- 
1.9.1.423.g4596e3a

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