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From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Robert Hancock <hancockrwd@gmail.com>
Cc: Tejun Heo <htejun@gmail.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	Georgi Chulkov <g.chulkov@jacobs-university.de>,
	linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org,
	Mark Lord <liml@rtr.ca>
Subject: Re: ATA device reset, shoud I be concerned?
Date: Thu, 27 Aug 2009 09:37:01 +0100	[thread overview]
Message-ID: <20090827093701.24598b69@lxorguk.ukuu.org.uk> (raw)
In-Reply-To: <4A95F212.5060008@gmail.com>

> Nvidia CK804 SATA controllers appear to also explode on reading TF 
> registers after media errors in certain cases. (They tend to either 
> lockup the machine or throw HyperTransport timeout machine check 

You must halt any running DMA activity before reading them. This is true
for pretty much all task file style controllers although the results of
not doing so vary by device somewhat.


  parent reply	other threads:[~2009-08-27  8:36 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-13 22:19 Georgi Chulkov
2008-01-15 10:54 ` Andrew Morton
2008-01-15 11:35   ` Alan Cox
2008-01-21  7:56     ` Tejun Heo
2008-01-21 13:02       ` Alan Cox
2008-01-21 13:14         ` Tejun Heo
2008-01-21 14:14           ` Alan Cox
2008-01-21 14:31             ` Tejun Heo
2008-01-21 14:33               ` Tejun Heo
2008-01-21 16:44                 ` Alan Cox
2009-08-27  2:40                 ` Robert Hancock
2009-08-27  3:07                   ` Jeff Garzik
2009-08-27  8:37                   ` Alan Cox [this message]
2008-01-21 16:47               ` Alan Cox
2008-01-21 17:02                 ` Tejun Heo
2008-01-21 17:27                   ` Alan Cox
2008-01-22  0:31                     ` Tejun Heo
2008-01-22  1:31                   ` Bartlomiej Zolnierkiewicz
2008-01-22  1:36                     ` Tejun Heo
2008-01-22  2:08                       ` Tejun Heo
2008-01-22  1:39                     ` Alan Cox
2008-01-22 20:29   ` Georgi Chulkov

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