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

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Message-ID: <20111206132527.GA13780@linaro.org>
Date:	Tue, 6 Dec 2011 13:25:27 +0000
From:	Dave Martin <dave.martin@...aro.org>
To:	Russell King - ARM Linux <linux@....linux.org.uk>
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 11:49:52AM +0000, Russell King - ARM Linux wrote:
> 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.

OK, hopefully we can safely ignore that case, then.

But other than that, you're in agreement?

Cheers
---Dave
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