netdev - Re: [PATCH net-next 2/5] net: stmmac: fix PPS capture input index

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Message-ID: <20231017-transfer-refurbish-5cfaf12a524c-mkl@pengutronix.de>
Date: Tue, 17 Oct 2023 22:27:41 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Jakub Kicinski <kuba@...nel.org>
Cc: Johannes Zink <j.zink@...gutronix.de>, kernel@...gutronix.de,
	linux-kernel@...r.kernel.org,
	Maxime Coquelin <mcoquelin.stm32@...il.com>, netdev@...r.kernel.org,
	Richard Cochran <richardcochran@...il.com>,
	Kurt Kanzenbach <kurt@...utronix.de>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	linux-stm32@...md-mailman.stormreply.com,
	Eric Dumazet <edumazet@...gle.com>,
	Jose Abreu <joabreu@...opsys.com>, Simon Horman <horms@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	"David S. Miller" <davem@...emloft.net>,
	linux-arm-kernel@...ts.infradead.org, patchwork-jzi@...gutronix.de
Subject: Re: [PATCH net-next 2/5] net: stmmac: fix PPS capture input index

On 17.10.2023 08:26:18, Jakub Kicinski wrote:
> On Tue, 17 Oct 2023 11:12:53 +0200 Johannes Zink wrote:
> > > If it is a bug fix then it should probably be targeted at 'net',
> > > creating a dependency for the remainder of this series.
> > > 
> > > On the other hand, if it is not a bug fix then perhaps it is best to
> > > update the subject and drop the Fixes tag.  
> > 
> > I added the fixes-Tag in order to make code archeology easier, but as it may 
> > trigger picks to stable branches (which is not required imho), I have no 
> > objections to dropping it for a v2.
> 
> Would be good to clarify what impact on device operation the problem
> has. How would end user notice the problem?
> Does it mean snapshots were always or never enabled, previously?

On all dwmac devices not covered by dwmac-intel.c (INTEL 10/100/1000
Ethernet PCI driver), PPS capture can be requested from user-space, but
is not enabled in HW. There is no error message or other feedback to the
user space. The user space will not get any PPS events.

As this change also affects the Intel driver, and we don't have any
hardware to test, I think it's better that this goes via net-next to
give it a bit more time of testing.

> Note that if you submit this fix for net today it will still make it 
> to -rc7 and net-next by tomorrow, so no major delay. We merge the trees
> on Thursday, usually.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
Vertretung Nürnberg              | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-9   |

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