linux-kernel - Re: [patch 1/1] Delay on vt6420 when starting ATAPI DMA write

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Date:	Tue, 16 Feb 2010 17:34:27 +0900
From:	Tejun Heo <htejun@...il.com>
To:	Bart Hartgers <bart.hartgers@...il.com>
CC:	Jeff Garzik <jgarzik@...ox.com>, linux-ide@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch 1/1] Delay on vt6420 when starting ATAPI DMA write

On 02/14/2010 09:04 PM, Bart Hartgers wrote:
> When writing a disc on certain lite-on dvd-writers (also rebadged 
> as optiarc/LG/...) connected to a vt6420, the ATAPI CDB ends
> up in the datastream and on the disc, causing silent corruption. 
> Delaying between sending the CDB and starting DMA seems to 
> prevent this.
> 
> I do not know if there are burners that do not suffer from
> this, but the patch should be safe for those as well.
> 
> There are many reports of this issue, but AFAICT no solution was 
> found before. For example:
> http://lkml.indiana.edu/hypermail/linux/kernel/0802.3/0561.html
> 
> Signed-off-by: Bart Hartgers <bart.hartgers@...il.com>

Acked-by: Tejun Heo <tj@...nel.org>

Thanks!

-- 
tejun
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