Call for testers: Apple ATA DMA

[Peter Grehan]

Hi Nathan,

> Could you try the new ata_macio.c at 
> http://people.freebsd.org/~nwhitehorn/ata_macio.c? If that fails, also 
> try changing sc->max_mode to WDMA2. My hardware (ata-3) won't let me 
> test the UDMA modes, but at least the WDMA ones should now work in this 
> configuration.

  Had to drop it to WDMA2 and then the DMA i/o's completed. However, the 
GEOM use-after-free panic persists. I'll see if I can get some more info 
about that.

later,

Peter.