linux-kernel - Re: [PATCH 1/2] gpio: don't override irq_*

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Message-ID: <CAMuHMdXg5UMnP2oN8UdyCEBb-RMzhhNgKZqZ0=3UPQ7RtaW4Ww@mail.gmail.com>
Date:	Mon, 17 Aug 2015 10:40:08 +0200
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Rabin Vincent <rabin@....in>, Alexandre Courbot <gnurou@...il.com>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] gpio: don't override irq_*_resources() callbacks

On Mon, Aug 3, 2015 at 10:53 AM, Linus Walleij <linus.walleij@...aro.org> wrote:
> On Fri, Jul 31, 2015 at 2:48 PM, Rabin Vincent <rabin@....in> wrote:
>
>> If the driver has specified its own irq_{request/release}_resources()
>> functions, don't override them.  The gpio-etraxfs driver will use this.
>>
>> Signed-off-by: Rabin Vincent <rabin@....in>
>
> Perfectly reasonable given the usecase in patch 2/2. Patch applied.

So for drivers currently using GPIOLIB_IRQCHIP the calbacks were
always overridden, even if they supplied their own?

Hence after this change, that's no longer the case, and pinctrl-at91.c
will use its own, which are identical to the generic ones, modulo the bug fix
in 5b76e79c77264899 ("gpiolib: irqchip: prevent driver unloading if gpio is
used as irq only"). Oops...

I already wrote an untested patch to convert pinctrl-at91 to the generic
ones, shall I send that right away?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds
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