linux-kernel - Re: [PATCH v2 6/7] net: dsa: b53: Add logic for TX timestamping

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Message-ID: <20211110152341.muap5bu5b2tmnnir@skbuf>
Date:   Wed, 10 Nov 2021 17:23:41 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Richard Cochran <richardcochran@...il.com>
Cc:     Kurt Kanzenbach <kurt@...utronix.de>,
        Martin Kaistra <martin.kaistra@...utronix.de>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        John Stultz <john.stultz@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org
Subject: Re: [PATCH v2 6/7] net: dsa: b53: Add logic for TX timestamping

On Wed, Nov 10, 2021 at 07:08:55AM -0800, Richard Cochran wrote:
> In any case, I agree that the driver should enable the capabilities of
> the HW and not impose artificial limitations.

Which was not my actual point. We were discussing whether the kernel
should attempt to take a 2-step TX timestamp if a different one is
outstanding, be it from the same socket or from a different one.
Whether the hardware supports multiple concurrent TX timestamps is
orthogonal to that.