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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>
This commit is contained in:
Herbert Xu 2008-08-15 14:56:37 -07:00 committed by David S. Miller
parent 6f85a124d8
commit 04a0551c87
1 changed files with 0 additions and 3 deletions
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3
drivers/net/loopback.c
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@ -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)) {