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Date: Mon, 27 Jan 2003 18:46:50 -0800 (PST)
From: Andre Hedrick <andre@linux-ide.org>
To: Ross Biro <rossb@google.com>
cc: linux-kernel@vger.kernel.org
Subject: Re: BUG: [2.4.18+] IDE Race Condition
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Okay, how do you reproduce it to see the effects?

On Mon, 27 Jan 2003, Ross Biro wrote:

> The net effect of this race condition and the other one I spotted is 
> that you may see some interesting messages in your log file and you can 
> detect the race condition if you look for it hard enough.  I don't 
> currently see any bad effects.
> 
>     Ross
> 
> Ross Biro wrote:
> 
> >
> > There is at least one more IDE race condition in 2.4.18 and 
> > 2.4.21-pre3. Basically the interrupt for the controller being serviced 
> > is left on while setting up the next command.  I'm not sure how much 
> > trouble it can cause but it does lead to some interesting stack traces.
> >
> > The condition
> > if (masked_irq && hwif->irq != masked_irq)
> > in ide_do_request should be replaced with
> > if (!masked_irq || hwif->irq != masked_irq)
> > in two places.
> >
> 
> 
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Andre Hedrick
LAD Storage Consulting Group

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