netdev - [PATCH] net: fix can_checksum_protocol() arguments swap

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Message-ID: <1295434296.3273.18.camel@edumazet-laptop>
Date:	Wed, 19 Jan 2011 11:51:36 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	David Miller <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>, Jesse Gross <jesse@...ira.com>,
	Hans de Bruin <jmdebruin@...net.nl>
Subject: [PATCH] net: fix can_checksum_protocol() arguments swap

commit 0363466866d901fbc (net offloading: Convert checksums to use
centrally computed features.) mistakenly swapped can_checksum_protocol()
arguments.

This broke IPv6 on bnx2 for instance, on NIC without TCPv6 checksum
offloads.

Reported-by: Hans de Bruin <jmdebruin@...net.nl>
Signed-off-by: Eric Dumazet <eric.dumazet@...il.com>
CC: Jesse Gross <jesse@...ira.com>
---
I cant believe I spent so much time on this bug.

 net/core/dev.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dev.c b/net/core/dev.c
index 54277df..cff6d9b 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -2001,7 +2001,7 @@ static bool can_checksum_protocol(unsigned long features, __be16 protocol)
 
 static int harmonize_features(struct sk_buff *skb, __be16 protocol, int features)
 {
-	if (!can_checksum_protocol(protocol, features)) {
+	if (!can_checksum_protocol(features, protocol)) {
 		features &= ~NETIF_F_ALL_CSUM;
 		features &= ~NETIF_F_SG;
 	} else if (illegal_highdma(skb->dev, skb)) {


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