linux-kernel - Re: [PATCH net v3] net: macb: Fix PTP one step sync support

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Message-ID: <3ecbe9d60f555266fe09d5a8c657b87d6f7564b8.camel@redhat.com>
Date:   Thu, 19 May 2022 20:17:54 +0200
From:   Paolo Abeni <pabeni@...hat.com>
To:     Harini Katakam <harini.katakam@...inx.com>,
        nicolas.ferre@...rochip.com, davem@...emloft.net,
        richardcochran@...il.com, claudiu.beznea@...rochip.com,
        kuba@...nel.org, edumazet@...gle.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        michal.simek@...inx.com, harinikatakamlinux@...il.com,
        radhey.shyam.pandey@...inx.com
Subject: Re: [PATCH net v3] net: macb: Fix PTP one step sync support

On Wed, 2022-05-18 at 22:37 +0530, Harini Katakam wrote:
> PTP one step sync packets cannot have CSUM padding and insertion in
> SW since time stamp is inserted on the fly by HW.
> In addition, ptp4l version 3.0 and above report an error when skb
> timestamps are reported for packets that not processed for TX TS
> after transmission.
> Add a helper to identify PTP one step sync and fix the above two
> errors. Add a common mask for PTP header flag field "twoStepflag".
> Also reset ptp OSS bit when one step is not selected.
> 
> Fixes: ab91f0a9b5f4 ("net: macb: Add hardware PTP support")
> Fixes: 653e92a9175e ("net: macb: add support for padding and fcs computation")
> Signed-off-by: Harini Katakam <harini.katakam@...inx.com>
> Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@...inx.com>

I'm sorry, but I cut the -net PR to Linus too early for this, so the
fix will have to wait for a little more (no need to repost!) and even
more pause will be required for the net-next follow-up.

Sorry for the inconvenince,

Paolo