netdev - Re: [PATCH 1/2] platform: make platform_get_irq

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Message-ID: <20220118091819.zzxpffrxbckoxiys@pengutronix.de>
Date:   Tue, 18 Jan 2022 10:18:19 +0100
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Andrew Lunn <andrew@...n.ch>, Ulf Hansson <ulf.hansson@...aro.org>,
        Vignesh Raghavendra <vigneshr@...com>, 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-devel@...a-project.org,
        Liam Girdwood <lgirdwood@...il.com>,
        Guenter Roeck <groeck@...omium.org>,
        Thierry Reding <thierry.reding@...il.com>,
        linux-mtd@...ts.infradead.org, linux-i2c@...r.kernel.org,
        Miquel Raynal <miquel.raynal@...tlin.com>,
        linux-phy@...ts.infradead.org, Lee Jones <lee.jones@...aro.org>,
        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>,
        Jiri Slaby <jirislaby@...nel.org>,
        Bartosz Golaszewski <brgl@...ev.pl>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Tony Luck <tony.luck@...el.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        bcm-kernel-feedback-list@...adcom.com,
        linux-serial@...r.kernel.org, Jakub Kicinski <kuba@...nel.org>,
        Zhang Rui <rui.zhang@...el.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        platform-driver-x86@...r.kernel.org, linux-pwm@...r.kernel.org,
        Robert Richter <rric@...nel.org>,
        Saravanan Sekar <sravanhome@...il.com>,
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        Mauro Carvalho Chehab <mchehab@...nel.org>,
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        Mark Gross <markgross@...nel.org>, linux-gpio@...r.kernel.org,
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        Takashi Iwai <tiwai@...e.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        openipmi-developer@...ts.sourceforge.net,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Benson Leung <bleung@...omium.org>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        linux-arm-kernel@...ts.infradead.org, linux-edac@...r.kernel.org,
        Sergey Shtylyov <s.shtylyov@....ru>,
        Richard Weinberger <richard@....at>,
        Mun Yew Tham <mun.yew.tham@...el.com>,
        Hans de Goede <hdegoede@...hat.com>, netdev@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Cornelia Huck <cohuck@...hat.com>, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-spi@...r.kernel.org,
        linux-renesas-soc@...r.kernel.org, Vinod Koul <vkoul@...nel.org>,
        James Morse <james.morse@....com>,
        Zha Qipeng <qipeng.zha@...el.com>,
        Sebastian Reichel <sre@...nel.org>,
        Niklas Söderlund <niklas.soderlund@...natech.se>,
        linux-mediatek@...ts.infradead.org,
        Brian Norris <computersforpeace@...il.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 1/2] platform: make platform_get_irq_optional() optional
 (summary)

On Sun, Jan 16, 2022 at 03:19:06PM +0100, Greg Kroah-Hartman wrote:
> On Sat, Jan 15, 2022 at 07:36:43PM +0100, Uwe Kleine-König wrote:
> > A possible compromise: We can have both. We rename
> > platform_get_irq_optional() to platform_get_irq_silent() (or
> > platform_get_irq_silently() if this is preferred) and once all users are
> > are changed (which can be done mechanically), we reintroduce a
> > platform_get_irq_optional() with Sergey's suggested semantic (i.e.
> > return 0 on not-found, no error message printking).
> 
> Please do not do that as anyone trying to forward-port an old driver
> will miss the abi change of functionality and get confused.  Make
> build-breaking changes, if the way a function currently works is
> changed in order to give people a chance.

Fine for me. I assume this is a Nack for Sergey's patch?

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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