Re: [PATCH] ide-scsi driver starts DMA too soon

Marcelo Tosatti (marcelo@conectiva.com.br)
Wed, 6 Nov 2002 10:27:21 -0200 (BRST)


On 2 Nov 2002, Alan Cox wrote:

> On Fri, 2002-11-01 at 23:39, Khalid Aziz wrote:
> > ide-scsi driver starts DMA as soon as it writes the ATAPI PACKET command
> > in command register and before sending the ATAPI command. This will
> > cause problems on many drives. Right way to do it is to start DMA after
> > sending the ATAPI command. I am attaching a patch that fixes this. This
> > patch will allow many more CD-RW drives to work reliably in DMA mode
> > than do today.
> >
> > Marcelo, please apply.
>
> Marcelo this is in 2.5, and 2.4-ac. Khalid is certainly correct although
> making such a change in -rc rather than a pre does mean it wants extra
> thought

I prefer being safe and saving this one for 2.4.21-pre.

Thanks Khalid!

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