From: Patrick McHardy <[EMAIL PROTECTED]>
Date: Mon, 26 Jun 2006 19:04:15 +0200

> I know this was discussed before, but I can't remember the
> exact outcome. Why don't we just unconditionally update iif
> in netif_receive_skb()?

Software devices might have interesting semantics that would
make not setting iif desirable.

Once you set iif, you can't just undo it because the information
is lost.

I also would really prefer to set it unconditionally in
netif_receive_skb(), but Jamal's concerns in this area are real.
We really need to evaluate this on a case-by-case basis.
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