From mboxrd@z Thu Jan  1 00:00:00 1970
From: Roger Luethi <rl@hellgate.ch>
Subject: VLAN packets silently dropped in promiscuous mode
Date: Wed, 29 Sep 2010 13:37:57 +0200
Message-ID: <20100929113757.GA23755@core.hellgate.ch>
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Cc: Patrick McHardy <kaber@trash.net>
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I noticed packets for unknown VLANs getting silently dropped even in
promiscuous mode (this is true only for the hardware accelerated path).
netif_nit_deliver was introduced specifically to prevent that, but the
function gets called only _after_ packets from unknown VLANs have been
dropped.

Presumably this has been the case since

commit e1c096e251e52773afeffbbcb74d0a072be47ea3
Author: Herbert Xu <herbert@gondor.apana.org.au>
Date:   Tue Jan 6 10:50:09 2009 -0800
    vlan: Add GRO interfaces

I didn't find any indication that the change in behavior is intentional. Is
it?

Roger