linux-kernel - Re: [PATCH] drivers/pcmcia: NO_IRQ removal for electra

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Date:   Thu, 16 Mar 2017 20:55:32 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     linux-pcmcia@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        oss@...error.net, linuxppc-dev@...abs.org,
        Claudiu Manoil <claudiu.manoil@....com>, qiang.zhao@....com
Subject: Re: [PATCH] drivers/pcmcia: NO_IRQ removal for electra_cf.c

Arnd Bergmann <arnd@...db.de> writes:
> On Wed, Mar 15, 2017 at 6:35 AM, Michael Ellerman <mpe@...erman.id.au> wrote:
>> I'll do patches for everything above that's not drivers/soc or
>> include/soc and hopefully we can hear from someone at NXP on the plans
>> for getting the soc parts enabled on arm.
>
> I think the removal of the NO_IRQ references is a requirement for
> getting the drivers working properly on ARM, as the OF platform
> code will use '0' for invalid IRQs.

OK. So the #define NO_IRQ (-1) in arch/arm/include/asm/irq.h is a red
herring and should be ignored for anything modern?

cheers