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From: Jeff Garzik <jgarzik@pobox.com>
To: Jens Axboe <axboe@suse.de>
Cc: Gary Poppitz <poppitzg@iomega.com>, linux-ide@vger.kernel.org
Subject: Re: Issues with SIS 964 chipset on SATA
Date: Thu, 17 Feb 2005 13:38:35 -0500	[thread overview]
Message-ID: <4214E4AB.2010507@pobox.com> (raw)
In-Reply-To: <20050217083825.GA8695@suse.de>

Jens Axboe wrote:
> On Thu, Feb 17 2005, Jeff Garzik wrote:
>>It looks like I will need to do a workaround for all SATA ATAPI devices: 
>> if the transfer is not a multiple of 4 bytes, pad it with an DMA 1-3 
>>byte DMA segment.
> 
> 
> Yeah we definitely need something like that. The optimal solution is to
> make sure that all requests are fed through the bounce logic like fs
> requests.


Could you elaborate?  I'm not sure I follow.

I hope you're not suggesting leaking 1-3 bytes of random memory, past 
the end of the request, into the DMA stream?

	Jeff



  parent reply	other threads:[~2005-02-17 18:38 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-02-07 19:02 Issues with SIS 964 chipset on SATA Gary Poppitz
2005-02-07 21:44 ` Jeff Garzik
2005-02-17  8:26 ` Jeff Garzik
2005-02-17  8:38   ` Jens Axboe
2005-02-17 13:26     ` Mark Lord
2005-02-17 18:36       ` Jeff Garzik
2005-02-17 18:38     ` Jeff Garzik [this message]
2005-02-17  8:37 ` ATAPI issues (was Re: Issues with SIS 964 chipset on SATA) Jeff Garzik

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