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SubjectRe: [PATCH] highmem I/O for ide-pmac.c
On Wed, Sep 11 2002, Benjamin Herrenschmidt wrote:
> >BTW, it would be ok to export that from ide-dma.c instead of duplicating
> >it in ide-pmac.
>
> It isn't. ide-pmac doesn't use the sg_table & other DMA related
> fields in HWIF, but it's own copies in the "pmif" which is a
> parallel data structure.

The above refers to ide_toggle_bounce() export, pmac_* variant is
exactly the same. Sorry if that wasn't clear.

> It sucks, I know, but I have to do that with the current IDE code
> as the common code would make assumption about the format of these
> things and it's right to dispose them in ide_unregister.
>
> Also, Jens is right, Paul, you never call pmac_ide_toggle_bounce()
> to actually enable high IOs. Add that to the ide_dma_on/check: case,
> with an if (drive->using_dma) (as enabling DMA may have failed)

Indeed

--
Jens Axboe

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