Message-ID: <YeF05vBOzkN+xYCq@smile.fi.intel.com>
Date:   Fri, 14 Jan 2022 15:04:38 +0200
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     Mark Brown <broonie@...nel.org>, Andrew Lunn <andrew@...n.ch>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Vignesh Raghavendra <vigneshr@...com>,
        KVM list <kvm@...r.kernel.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>, linux-iio@...r.kernel.org,
        Linus Walleij <linus.walleij@...aro.org>,
        Amit Kucheria <amitk@...nel.org>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Guenter Roeck <groeck@...omium.org>,
        Thierry Reding <thierry.reding@...il.com>,
        MTD Maling List <linux-mtd@...ts.infradead.org>,
        Linux I2C <linux-i2c@...r.kernel.org>,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        linux-phy@...ts.infradead.org, Jiri Slaby <jirislaby@...nel.org>,
        openipmi-developer@...ts.sourceforge.net,
        "David S. Miller" <davem@...emloft.net>,
        Khuong Dinh <khuong@...amperecomputing.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        Joakim Zhang <qiangqing.zhang@....com>,
        Kamal Dasu <kdasu.kdev@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        "open list:SERIAL DRIVERS" <linux-serial@...r.kernel.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Linux PWM List <linux-pwm@...r.kernel.org>,
        Robert Richter <rric@...nel.org>,
        Saravanan Sekar <sravanhome@...il.com>,
        Corey Minyard <minyard@....org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Peter Korsgaard <peter@...sgaard.com>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Mark Gross <markgross@...nel.org>,
        Hans de Goede <hdegoede@...hat.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Tony Luck <tony.luck@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Sebastian Reichel <sre@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Takashi Iwai <tiwai@...e.com>,
        platform-driver-x86@...r.kernel.org,
        Benson Leung <bleung@...omium.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linux-edac@...r.kernel.org, Sergey Shtylyov <s.shtylyov@....ru>,
        Mun Yew Tham <mun.yew.tham@...el.com>,
        Eric Auger <eric.auger@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Cornelia Huck <cohuck@...hat.com>,
        Linux MMC List <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Vinod Koul <vkoul@...nel.org>,
        James Morse <james.morse@....com>,
        Zha Qipeng <qipeng.zha@...el.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Richard Weinberger <richard@....at>,
        Niklas Söderlund 
        <niklas.soderlund@...natech.se>,
        linux-mediatek@...ts.infradead.org,
        Brian Norris <computersforpeace@...il.com>,
        netdev@...r.kernel.org
Subject: Re: [PATCH] driver core: platform: Rename
 platform_get_irq_optional() to platform_get_irq_silent()

On Thu, Jan 13, 2022 at 08:43:58PM +0100, Uwe Kleine-König wrote:
> The subsystems regulator, clk and gpio have the concept of a dummy
> resource. For regulator, clk and gpio there is a semantic difference
> between the regular _get() function and the _get_optional() variant.
> (One might return the dummy resource, the other won't. Unfortunately
> which one implements which isn't the same for these three.) The
> difference between platform_get_irq() and platform_get_irq_optional() is
> only that the former might emit an error message and the later won't.
> 
> To prevent people's expectations that there is a semantic difference
> between these too, rename platform_get_irq_optional() to
> platform_get_irq_silent() to make the actual difference more obvious.
> 
> The #define for the old name can and should be removed once all patches
> currently in flux still relying on platform_get_irq_optional() are
> fixed.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> ---
> Hello,
> 
> On Thu, Jan 13, 2022 at 02:45:30PM +0000, Mark Brown wrote:
> > On Thu, Jan 13, 2022 at 12:08:31PM +0100, Uwe Kleine-König wrote:
> > 
> > > This is all very unfortunate. In my eyes b) is the most sensible
> > > sense, but the past showed that we don't agree here. (The most annoying
> > > part of regulator_get is the warning that is emitted that regularily
> > > makes customers ask what happens here and if this is fixable.)
> > 
> > Fortunately it can be fixed, and it's safer to clearly specify things.
> > The prints are there because when the description is wrong enough to
> > cause things to blow up we can fail to boot or run messily and
> > forgetting to describe some supplies (or typoing so they haven't done
> > that) and people were having a hard time figuring out what might've
> > happened.
> 
> Yes, that's right. I sent a patch for such a warning in 2019 and pinged
> occationally. Still waiting for it to be merged :-\
> (https://lore.kernel.org/r/20190625100412.11815-1-u.kleine-koenig@pengutronix.de)
> 
> > > I think at least c) is easy to resolve because
> > > platform_get_irq_optional() isn't that old yet and mechanically
> > > replacing it by platform_get_irq_silent() should be easy and safe.
> > > And this is orthogonal to the discussion if -ENOXIO is a sensible return
> > > value and if it's as easy as it could be to work with errors on irq
> > > lookups.
> > 
> > It'd certainly be good to name anything that doesn't correspond to one
> > of the existing semantics for the API (!) something different rather
> > than adding yet another potentially overloaded meaning.
> 
> It seems we're (at least) three who agree about this. Here is a patch
> fixing the name.


And similar number of people are on the other side.

-- 
With Best Regards,
Andy Shevchenko

Powered by blists - more mailing lists