Re: 2.4.21-rc1-ac2 Promise IDE DMA won't work

[Alan Cox]

On Maw, 2003-04-29 at 21:15, Andre Hedrick wrote:
> The Promise chipset use a second DMA engine at offset 0x24 respective of
> the channel.  Mixing an ATA and ATAPI on that channel is almost impossible
> to make the corner cases work.  Next, if there us a 48-bit ATA plus ATAPI
> on the channel popping between the two enignes does not look sane at all
> because one has to swithc the location of the hwif->sgtable.

You can wrap that on the drivers for the disk stuff now but not cleanly for
the other cases. Is there any reason we can't use the ATAPI engine for
everything btw ?