From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH net] nfp: flower: remove headroom from max MTU
 calculation
Date: Thu, 10 May 2018 15:28:27 -0400 (EDT)
Message-ID: <20180510.152827.2297604674993831939.davem@davemloft.net>
References: <20180509071858.11124-1-jakub.kicinski@netronome.com>
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Cc: oss-drivers@netronome.com, netdev@vger.kernel.org,
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To: jakub.kicinski@netronome.com
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From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Wed,  9 May 2018 00:18:58 -0700

> From: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
> 
> Since commit 29a5dcae2790 ("nfp: flower: offload phys port MTU change") we
> take encapsulation headroom into account when calculating the max allowed
> MTU.  This is unnecessary as the max MTU advertised by firmware should have
> already accounted for encap headroom.
> 
> Subtracting headroom twice brings the max MTU below what's necessary for
> some deployments.
> 
> Fixes: 29a5dcae2790 ("nfp: flower: offload phys port MTU change")
> Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
> Reviewed-by: John Hurley <john.hurley@netronome.com>
> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>

Applied.