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From: Robert Hancock <hancockr@shaw.ca>
To: Alexander <aledin@mail.ru>
Cc: linux-kernel@vger.kernel.org, ide <linux-ide@vger.kernel.org>,
	Jeff Garzik <jeff@garzik.org>, Tejun Heo <htejun@gmail.com>
Subject: Re: PROBLEM REMAINS: [sata_nv ADMA breaks ATAPI] Crash on accessing DVD-RAM
Date: Thu, 10 Jan 2008 23:46:47 -0600	[thread overview]
Message-ID: <478702C7.80401@shaw.ca> (raw)
In-Reply-To: <fa.krOVfyFmB2aqGjJIoHCLmQxecWc@ifi.uio.no>

Alexander wrote:
> Hello!
> 
> The problem described at https://bugzilla.redhat.com/show_bug.cgi?id=351451 and
> at http://ubuntuforums.org/showthread.php?t=655772 and supposedly fixed by the
> patch http://kerneltrap.org/mailarchive/linux-kernel/2007/11/25/445094 is still
> there. I have compiled 2.6.24-rc7 kernel and booted my PC with it just to find
> out that my SATA DVD-RW is

There's this patch which was intended to fix it:

http://lkml.org/lkml/2007/11/22/148

which hasn't been merged yet. I see now that there was some further 
discussion from someone saying that didn't fix the problem for them, 
which I wasn't CCed on.. It looks like in their case, libata is 
receiving SGs with DMA addresses above 4GB even though the block layer 
bounce limit is set to 32-bit. That's the mechanism that sata_nv depends 
on to ensure that it gets proper addresses when accessing ATAPI devices 
where it is limited to 32-bit DMA.. Could that be breaking or 
insufficient somehow?

-- 
Robert Hancock      Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@nospamshaw.ca
Home Page: http://www.roberthancock.com/


       reply	other threads:[~2008-01-11  5:48 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <fa.krOVfyFmB2aqGjJIoHCLmQxecWc@ifi.uio.no>
2008-01-11  5:46 ` Robert Hancock [this message]
2008-01-12  8:25   ` Alexander
2008-01-12 19:25     ` Robert Hancock
2008-01-12 20:35       ` James Bottomley
2008-01-12 23:04         ` Robert Hancock
2008-01-12 23:27           ` James Bottomley
2008-01-13  1:38             ` Robert Hancock
2008-01-13  3:12               ` James Bottomley
2008-01-13 13:33               ` Alan Cox
2008-01-13 15:38                 ` James Bottomley
2008-01-13 16:29                   ` Alan Cox
2008-01-13 16:51                     ` James Bottomley
2008-01-15  1:41                       ` Robert Hancock
2008-01-15  2:23                         ` James Bottomley
2008-02-01  0:09 ` Robert Hancock
2008-02-01  9:59   ` Alexander
2008-02-04  8:29   ` Alexander
2008-01-10 13:44 Alexander

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