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

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Message-ID: <20200714140134.GA19806@hoboy>
Date:   Tue, 14 Jul 2020 07:01:34 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Sergey Organov <sorganov@...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

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>