From 04a0551c87363f100b04d28d7a15a632b70e18e7 Mon Sep 17 00:00:00 2001
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: Fri, 15 Aug 2008 14:56:37 -0700
Subject: [PATCH] loopback: Drop obsolete ip_summed setting
Now that the network stack can handle inbound packets with partial
checksums, we should no longer clobber the ip_summed field in the
loopback driver. This is because CHECKSUM_UNNECESSARY implies that
the checksum field is actually valid which is not true for loopback
packets since it's only partial (and thus complemented).
This allows packets from lo to then be SNATed to an external source
while still preserving the checksum's validity.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/loopback.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c
index 489d53be2f5d..3b43bfd85a0f 100644
--- a/drivers/net/loopback.c
+++ b/drivers/net/loopback.c
@@ -75,9 +75,6 @@ static int loopback_xmit(struct sk_buff *skb, struct net_device *dev)
skb_orphan(skb);
skb->protocol = eth_type_trans(skb,dev);
-#ifndef LOOPBACK_MUST_CHECKSUM
- skb->ip_summed = CHECKSUM_UNNECESSARY;
-#endif
#ifdef LOOPBACK_TSO
if (skb_is_gso(skb)) {
--
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