linux-kernel - Re: [PATCH] pata_of_platform: fix no irq handling

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Date:	Tue, 7 Oct 2008 01:32:09 +0400
From:	Anton Vorontsov <avorontsov@...mvista.com>
To:	Matt Sealey <matt@...esi-usa.com>
Cc:	Jeff Garzik <jgarzik@...ox.com>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	Li Yang <leoli@...escale.com>, Wang Jian <lark@...ux.net.cn>
Subject: Re: [PATCH] pata_of_platform: fix no irq handling

On Mon, Oct 06, 2008 at 03:41:19PM -0500, Matt Sealey wrote:
> There is a simple problem with the patch which is that an "IRQ 0" can and does
> actually exist on a bunch of platforms, at least to the best of my knowledge.
> 
> Checking for -1 (which means for definite, no irq at all, because it is
> totally unambiguous, as a -1 IRQ numbering is "impossible") is more correct.

This was discussed years ago.

http://lkml.org/lkml/2005/11/22/159
http://lkml.org/lkml/2005/11/22/227

-- 
Anton Vorontsov
email: cbouatmailru@...il.com
irc://irc.freenode.net/bd2
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