netdev - Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20171005222159.GO13247@lunn.ch>
Date:   Fri, 6 Oct 2017 00:21:59 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Rob Herring <robh@...nel.org>
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Corentin Labbe <clabbe.montjoie@...il.com>,
        mark.rutland@....com, maxime.ripard@...e-electrons.com,
        wens@...e.org, linux@...linux.org.uk, catalin.marinas@....com,
        will.deacon@....com, peppe.cavallaro@...com,
        alexandre.torgue@...com, frowand.list@...il.com,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: Re: [PATCH v6 11/11] of: mdio: Prevent of_mdiobus_register from
 scanning mdio-mux nodes

> Looking at this some more, why can't mdio-mux-mmio be used?

Hi Rob

That was my first thought. And then i dug into the details. The mux is
more than just a couple of bits in an address space. Clocks needs to
be enabled/disabled, and the MAC needs a reset, when the mux changes.
So the mux needs intimate knowledge of MAC.

   Andrew