linux-kernel - Re: [PATCH 2/3] Add GD-Rom support to the SEGA Dreamcast

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Date:	Sun, 16 Dec 2007 10:09:13 +0000
From:	Christoph Hellwig <hch@...radead.org>
To:	Paul Mundt <lethal@...ux-sh.org>,
	Adrian McMenamin <lkmladrian@...il.com>,
	linux-kernel@...r.kernel.org, linux-ide@...r.kernel.org,
	linux-sh@...r.kernel.org, axboe@...nel.dk
Subject: Re: [PATCH 2/3] Add GD-Rom support to the SEGA Dreamcast

On Sun, Dec 16, 2007 at 06:50:19PM +0900, Paul Mundt wrote:
> > +static irqreturn_t gdrom_command_interrupt(int irq, void *dev_id)
> > +{
> > +	if (dev_id != &gd)
> > +		return IRQ_NONE;
> 
> You aren't setting this up as a shared IRQ, so this shouldn't be
> necessary.

It's not nessecary for shared irqs either.  The irq code will never
pass you a different cookied back than the one you passed in.
Everything else would be a nighmare and these cargo cult workarounds
wouldn't help either.

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