netdev - Re: [PATCH v1] ptp: add ToD device driver for Intel FPGA cards

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Message-ID: <73rqs90r-nn9o-s981-9557-q70no2435176@syhkavp.arg>
Date:   Wed, 15 Mar 2023 10:37:58 -0400 (EDT)
From:   Nicolas Pitre <nico@...xnic.net>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
cc:     Richard Cochran <richardcochran@...il.com>,
        Tianfei Zhang <tianfei.zhang@...el.com>,
        netdev@...r.kernel.org, linux-fpga@...r.kernel.org,
        ilpo.jarvinen@...ux.intel.com, russell.h.weight@...el.com,
        matthew.gerlach@...ux.intel.com,
        pierre-louis.bossart@...ux.intel.com, vinicius.gomes@...el.com,
        Raghavendra Khadatare <raghavendrax.anand.khadatare@...el.com>
Subject: Re: [PATCH v1] ptp: add ToD device driver for Intel FPGA cards

On Wed, 15 Mar 2023, Andy Shevchenko wrote:

> +Cc: Nicolas
> 
> On Tue, Mar 14, 2023 at 12:46:48PM -0700, Richard Cochran wrote:
> > On Tue, Mar 14, 2023 at 12:47:03PM +0200, Andy Shevchenko wrote:
> > > The semantics of the above is similar to gpiod_get_optional() and since NULL
> > > is a valid return in such cases, the PTP has to handle this transparently to
> > > the user. Otherwise it's badly designed API which has to be fixed.
> > 
> > Does it now?  Whatever.
> > 
> > > TL;DR: If I'm mistaken, I would like to know why.
> > 
> > git log.  git blame.
> > 
> > Get to know the tools of trade.
> 
> So, the culprit seems the commit d1cbfd771ce8 ("ptp_clock: Allow for it
> to be optional") which did it half way.
> 
> Now I would like to know why the good idea got bad implementation.
> 
> Nicolas?

I'd be happy to help but as presented I simply don't know what you're 
talking about. Please give me more context.


Nicolas