netdev - Re: [Patch net-next v3 09/13] net: dsa: microchip: ptp: move pdelay

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Date:   Fri, 9 Dec 2022 17:08:18 +0200
From:   Vladimir Oltean <olteanv@...il.com>
To:     Arun Ramadoss <arun.ramadoss@...rochip.com>
Cc:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        woojung.huh@...rochip.com, UNGLinuxDriver@...rochip.com,
        andrew@...n.ch, vivien.didelot@...il.com, f.fainelli@...il.com,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, linux@...linux.org.uk,
        Tristram.Ha@...rochip.com, richardcochran@...il.com,
        ceggers@...i.de
Subject: Re: [Patch net-next v3 09/13] net: dsa: microchip: ptp: move
 pdelay_rsp correction field to tail tag

On Fri, Dec 09, 2022 at 12:54:33PM +0530, Arun Ramadoss wrote:
> From: Christian Eggers <ceggers@...i.de>
> 
> For PDelay_Resp messages we will likely have a negative value in the
> correction field. The switch hardware cannot correctly update such
> values (produces an off by one error in the UDP checksum), so it must be
> moved to the time stamp field in the tail tag. Format of the correction
> field is 48 bit ns + 16 bit fractional ns.  After updating the
> correction field, clone is no longer required hence it is freed.
> 
> Signed-off-by: Christian Eggers <ceggers@...i.de>

Similar. This needs your sign off too.