Tomita, Haruo wrote:

It may be unavoidable one that ata_piix does not work. 
But, it is a problem that a DMA transfer does not enable by piix. 
Don't you think so?

This is unavoidable.  Two drivers grabbing the same PCI I/O range is
dangerous.

Now that libata supports PATA, it would be easier to let libata support
both SATA and PATA.  Since that is a single driver, it makes DMA easy to
support for both SATA/PATA.

If libata does this, there needs to be a "ide=disable" or
"legacy_ide=libata" switch added somewhere, for the cases (most distros)
where IDE driver is built-in.

	Jeff