Re: [RFC] libata IORDY handling

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>     It's sad to say but there's another bug in this function (even a 
> regression from drivers/ide/pci/siimage.c) -- the 16-bit IORDY is not enabled 
> when setting PIO mode (there's code that twiddles IORDY enable but that's 
> actually only for *taskfile* accesses, 16-bit IORDY is controlled by the same 
> PCI  config. registers 80h/84h that enable DMA/UDMA transfer on SiI 680).

Fixed - also fixed clearing the bits when going into PIO mode from DMA,
which fixes a potential DMA changedown bug.

Also redone the iordy stuff as your emails reminded me that it needed
finishing off and sorting out.

Alan
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