From: David S. Miller <davem@davemloft.net>
Date: Sat, 16 Nov 2013 02:11:16 +0000 (-0500)
Subject: net: Handle CHECKSUM_COMPLETE more adequately in pskb_trim_rcsum().
X-Git-Tag: v3.13-rc1~33^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=018c5bba052b3a383d83cf0c756da0e7bc748397;p=pandora-kernel.git

net: Handle CHECKSUM_COMPLETE more adequately in pskb_trim_rcsum().

Currently pskb_trim_rcsum() just balks on CHECKSUM_COMPLETE packets
and remarks them as CHECKSUM_NONE, forcing a software checksum
validation later.

We have all of the mechanics available to fixup the skb->csum value,
even for complicated fragmented packets, via the helpers
skb_checksum() and csum_sub().

So just use them.

Based upon a suggestion by Herbert Xu.

Signed-off-by: David S. Miller <davem@davemloft.net>
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