[patch 0/1] [PATCH v2] sata_via: Delay on vt6420 when starting ATAPI DMA write

[Bart Hartgers]

Hi Jeff,

As promised, here is the updated patch to fix the vt6420 ATAPI
corruption. It applies on top of my previous patch for the vt6421 PATA
DMA fix.

Sorry for sending this as a quilt patchset of one, but it is the only
reliable way I know to send patches through gmail unharmed.

Groeten,
Bart
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[Bart Hartgers]

[Tejun Heo]

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.h...@gmail.com>

Acked-by: Tejun Heo <t...@kernel.org>

Thanks!

--
tejun