linux-kernel - Re: PROBLEM REMAINS: [sata_nv ADMA breaks ATAPI] Crash on accessing DVD-RAM

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Message-ID: <20080113133317.50ad4bda@lxorguk.ukuu.org.uk>
Date:	Sun, 13 Jan 2008 13:33:17 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	Robert Hancock <hancockr@...w.ca>
Cc:	James Bottomley <James.Bottomley@...senPartnership.com>,
	Alexander <aledin@...l.ru>, linux-kernel@...r.kernel.org,
	ide <linux-ide@...r.kernel.org>, Jeff Garzik <jeff@...zik.org>,
	Tejun Heo <htejun@...il.com>
Subject: Re: PROBLEM REMAINS: [sata_nv ADMA breaks ATAPI] Crash	on	accessing
 DVD-RAM

> Other than that, I guess the solutions would be to just set a 32-bit 
> mask on the device if either port has an ATAPI device connected (which 
> is fairly ugly, considering that you could do things like hotplug an 
> ATAPI device when the other port was in use, for example), or do 
> something to prevent requests from reaching this point with >4GB 
> addresses in the first place..

With 2.6.24 almost released I think that is a must do for the moment and
since we also have hotplugging fo devices it might be easier for .24 to
just set a 32bit DMA mask and be done with it, then fix it later.

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