netdev - Re: [PATCH net-next 04/14] net: dsa: mv88e6xxx: rework ATU Load/Purge

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Date:   Fri, 10 Mar 2017 03:27:48 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...oirfairelinux.com,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>
Subject: Re: [PATCH net-next 04/14] net: dsa: mv88e6xxx: rework ATU Load/Purge

On Thu, Mar 09, 2017 at 06:33:14PM -0500, Vivien Didelot wrote:
> All Marvell switch chips have an ATU accessed using the same Global (1)
> register layout. Only the handling of the FID differs as more bits were
> necessary to support more and more databases.
> 
> Add and use a fresh documented implementation of the ATU Load/Purge.

This is not really the Linux way of doing something. You don't throw
something away and replace it. You incrementally modify what you have
into something better.

I really wished you had moved the code, unmodified, into
global1_atu.c. Then made lots of easy to review small changes. I
cannot just look at this patch and know it is correct. What i need to
compare against is not in this patch. So it is a lot harder to review.

I will continue this review later...

  Andrew