linux-kernel - Re: [PATCH v5 16/44] Input: gameport: add ISA and HAS

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Message-ID: <ZGvpyETg8dug9Awm@google.com>
Date:   Mon, 22 May 2023 15:16:40 -0700
From:   Dmitry Torokhov <dmitry.torokhov@...il.com>
To:     Niklas Schnelle <schnelle@...ux.ibm.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-pci@...r.kernel.org, Arnd Bergmann <arnd@...nel.org>,
        linux-input@...r.kernel.org
Subject: Re: [PATCH v5 16/44] Input: gameport: add ISA and HAS_IOPORT
 dependencies

Hi Niklas,

On Mon, May 22, 2023 at 12:50:21PM +0200, Niklas Schnelle wrote:
> diff --git a/include/linux/gameport.h b/include/linux/gameport.h
> index 8c2f00018e89..4d5720022b63 100644
> --- a/include/linux/gameport.h
> +++ b/include/linux/gameport.h
> @@ -167,16 +167,21 @@ static inline void gameport_trigger(struct gameport *gameport)
>  {
>  	if (gameport->trigger)
>  		gameport->trigger(gameport);
> +#ifdef CONFIG_HAS_IOPORT
>  	else
>  		outb(0xff, gameport->io);
> +#endif

Contrary to the cover letter, this is still kind-of runtime detection
(i.e. broken drivers will silently stop working), we need to have
dev_err[_ratelimited?] here and below.

I also just posted a patch reworking this a bit so this and the chunk
below can be hidden in gameport.c.

Thanks.

-- 
Dmitry