tree ed9f7d5c31117b0413b97e3d37f8739df6954a21
parent fdaefd62fd658b266a8f389cdf7991630b4bc7b4
author Alexander Duyck <aduyck@mirantis.com> 1454714900 -0800
committer David S. Miller <davem@davemloft.net> 1455198934 -0500

udp: Use uh->len instead of skb->len to compute checksum in segmentation

The segmentation code was having to do a bunch of work to pull the
skb->len and strip the udp header offset before the value could be used to
adjust the checksum.  Instead of doing all this work we can just use the
value that goes into uh->len since that is the correct value with the
correct byte order that we need anyway.  By using this value we can save
ourselves a bunch of pain as there is no need to do multiple byte swaps.

Signed-off-by: Alexander Duyck <aduyck@mirantis.com>
Acked-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>