On Thu, 1 Nov 2007 05:07:33 -0400
Jeff Garzik <[email protected]> wrote:
>
> This is purely for comment and testing, not for merging (yet?).
>
> A common recipe in several vendor drivers (either GPL'd, or I have NDA'd
> access to use them as a documentation-like reference) for ATAPI was
> slightly different from ours. This recipe can be found in
> atapi_tf_xfer_size(), and it's slightly different from Alan's.
Looks mostly good. Might cause breakage on one or two controllers by
setting lbam/lbah to 0 for DMA but we can test that and find out.
Note however - the scheme in use now has been tested for over ten years
in drivers/ide. The scheme below has not...
Having an ata_tf_xfer_size method is definitely a good idea whatever
methods we eventually decide on.
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