linux-kernel - Re: [PATCH v2 net] net: fec: fix hardware time stamping by external devices

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Date:   Tue, 14 Jul 2020 17:27:16 +0300
From:   Sergey Organov <sorganov@...il.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Fugang Duan <fugang.duan@....com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Vladimir Oltean <olteanv@...il.com>
Subject: Re: [PATCH v2 net] net: fec: fix hardware time stamping by external
 devices

Richard Cochran <richardcochran@...il.com> writes:

> On Sat, Jul 11, 2020 at 03:08:42PM +0300, Sergey Organov wrote:
>> Fix support for external PTP-aware devices such as DSA or PTP PHY:
>> 
>> Make sure we never time stamp tx packets when hardware time stamping
>> is disabled.
>> 
>> Check for PTP PHY being in use and then pass ioctls related to time
>> stamping of Ethernet packets to the PTP PHY rather than handle them
>> ourselves. In addition, disable our own hardware time stamping in this
>> case.
>> 
>> Fixes: 6605b73 ("FEC: Add time stamping code and a PTP hardware clock")
>> Signed-off-by: Sergey Organov <sorganov@...il.com>
>> ---
>> 
>> v2:
>>   - Extracted from larger patch series
>>   - Description/comments updated according to discussions
>>   - Added Fixes: tag
>
> Acked-by: Richard Cochran <richardcochran@...il.com>

Thanks for reviewing!

-- Sergey