netdev - Re: [PATCH v2] net: stmmac: correct MAC propagation delay

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Date: Tue, 25 Jul 2023 20:39:48 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Richard Cochran <richardcochran@...il.com>
Cc: Johannes Zink <j.zink@...gutronix.de>, Giuseppe Cavallaro
 <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...s.st.com>,
 Jose Abreu <joabreu@...opsys.com>, "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>, Maxime
 Coquelin <mcoquelin.stm32@...il.com>, Russell King <linux@...linux.org.uk>,
 patchwork-jzi@...gutronix.de, netdev@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 kernel@...gutronix.de, kernel test robot <lkp@...el.com>
Subject: Re: [PATCH v2] net: stmmac: correct MAC propagation delay

On Tue, 25 Jul 2023 20:22:53 -0700 Richard Cochran wrote:
> > any opinion on this one?  
> 
> Yeah, I saw it, but I can't get excited about drivers trying to
> correct delays.  I don't think this can be done automatically in a
> reliable way, and so I expect that the few end users who are really
> getting into the microseconds and nanoseconds will calibrate their
> systems end to end, maybe even patching out this driver nonsense in
> their kernels.
> 
> Having said that, I won't stand in the way of such driver stuff.
> After all, who cares about a few microseconds time error one way or
> the other?

I see :)