linux-kernel - Re: [PATCH] ata: Don't use NO_IRQ in pata_of

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Date:	Tue, 6 Dec 2011 11:49:52 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Dave Martin <dave.martin@...aro.org>
Cc:	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	Pawel Moll <pawel.moll@....com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	devicetree-discuss@...ts.ozlabs.org,
	LKML <linux-kernel@...r.kernel.org>,
	Jeff Garzik <jgarzik@...hat.com>, linux-ide@...r.kernel.org,
	Randy Dunlap <rdunlap@...otime.net>,
	linux-next@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Anton Vorontsov <cbouatmailru@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>
Subject: Re: [PATCH] ata: Don't use NO_IRQ in pata_of_platform driver

On Tue, Dec 06, 2011 at 11:37:35AM +0000, Dave Martin wrote:
> 1) All OF code and drivers should be migrating to use 0 instead of NO_IRQ
>    for the no-interrupt case.  Code which receives irq numbers directly
>    from the OF framework and refers to NO_IRQ, or expects 0 to be a valid
>    needs to be fixed.
> 
> 2) Where we hit a problem, board code needs to be adapted to remap HW IRQs
>    0-15 to different software values.  (This could be done using irq
>    domains, or not)

No AMBA driver I'm aware of ever uses an IRQ number 0 or is passed such
an IRQ number.
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