linux-kernel - Re: [PATCH net-next] net: dsa: convert to ndo_hwtstamp_get() and ndo_hwtstamp

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Message-ID: <904c9113-0b01-4b9d-995f-f2729426281e@linux.dev>
Date: Thu, 8 May 2025 23:15:30 +0100
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Vladimir Oltean <vladimir.oltean@....com>
Cc: netdev@...r.kernel.org, KÃ¶ry Maincent
 <kory.maincent@...tlin.com>, Kurt Kanzenbach <kurt@...utronix.de>,
 Andrew Lunn <andrew@...n.ch>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Woojung Huh <woojung.huh@...rochip.com>,
 UNGLinuxDriver@...rochip.com, Claudiu Manoil <claudiu.manoil@....com>,
 Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Simon Horman <horms@...nel.org>, Richard Cochran <richardcochran@...il.com>,
 Russell King <linux@...linux.org.uk>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] net: dsa: convert to ndo_hwtstamp_get() and
 ndo_hwtstamp_set()

On 08/05/2025 21:56, Vladimir Oltean wrote:
> On Thu, May 08, 2025 at 09:48:40PM +0100, Vadim Fedorenko wrote:
>> On 08/05/2025 21:40, Vladimir Oltean wrote:
>>> On Thu, May 08, 2025 at 09:25:14PM +0100, Vadim Fedorenko wrote:
>>>> The new interface also supports providing error explanation via extack,
>>>> it would be great to add some error messages in case when setter fails.
>>>> For example, HIRSCHMANN HellCreek switch doesn't support disabling
>>>> of timestamps, it's not obvious from general -ERANGE error code, but can
>>>> be explained by the text in extack message.
>>>
>>> I wanted to keep the patches spartan and not lose track of the conversion
>>> subtleties in embelishments like extack messages which can be added later
>>> and do not require nearly as much attention to the flow before and after.
>>> I'm afraid if I say "yes" here to the request to add extack to hellcreek
>>> I'm opening the door to further requests to do that for other DSA drivers,
>>> and sadly I do not have infinite time to fulfill them. Plus, I would
>>> like to finalize the conversion tree-wide by the end of this development
>>> cycle.
>>>
>>> Even if I were to follow through with your request, I would do so in a
>>> separate patch. I've self-reviewed this patch prior to posting it, and I
>>> was already of the impression that it is pretty busy as it is.
>>
>> I agree that the patch is pretty busy, and the extack additions should
>> go into separate patch. The only thing which bothers me is that it may never
>> happen if it's not done with this patch.
> 
> That may well be. But look at it another way, I wrote this patch in July
> 2023 and never got to upstream it, then Kory pinged me because it's
> necessary to get rid of the old API. I don't want to go back and spend
> time on extack messages when there's still a long way to go, and the
> priority is obviously somewhere else. I've added this request to my
> to-do list, and if I still have time at the end of all conversions, I'll
> go through DSA drivers and see what can be improved.
> 
>> Anyway, the conversion code looks good, so
>>
>> Reviewed-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
> 
> Thanks for the review, here and elsewhere. Do you want me to copy you on
> the remaining conversions?

Yes, please. I'm trying to follow all PTP-related things as it's my
current focus.

Thanks,
Vadim