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Date:   Thu, 14 May 2020 15:47:16 +0000
From:   Christian Herber <>
To:     Andrew Lunn <>,
        Oleksij Rempel <>
CC:     Mark Rutland <>, Marek Vasut <>,
        Florian Fainelli <>,
        "" <>,
        "" <>,
        Pengutronix Kernel Team <>,
        David Jander <>,
        "David S. Miller" <>,
        Heiner Kallweit <>
Subject: RE: [EXT] Re: [PATCH net-next v1] net: phy: tja11xx: add cable-test

Hi Andrew,

> On Wed, May 13, 2020 at 03:39:00PM +0200, Andrew Lunn wrote:
>> On Thu, May 14, 2020 at 02:09:59PM +0200, Oleksij Rempel wrote:
>>  ETHTOOL_A_CABLE_RESULT_CODE_ACTIVE_PARTNER - the link partner is active.
>>      The TJA1102 is able to detect it if partner link is master.
> master is not a cable diagnostics issue. This is a configuration
> issue.

Master is very relevant for cable diagnostics, as a cable measurement should not be done with an active link partner on the other end (i.e. a PHY in master mode trying to train the link).

So if the measurement detects an active link partner disturbing the measurement, it is important to report this to the user.


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