Re: Acer M5229 IDE bugs (esp. on sparc64)

[Rafal Boni <rafal%pobox.com@localhost>]

Rafal Boni wrote:
> Another interesting thing is a hack I took from OpenBSD to not skip 
> channels that don't have the WDCF_IRQ_WAIT flag set in pciide_pci_intr() 
> [1] seemed to make the controller behave better -- much fewer of the DMA 
> errors with status WDC_DMAST_UNDER, and in fact the interface downgraded 
> to Ultra/33 (from /66 originally) and then produced no further errors.

Eh, this might make it slightly better but it certainly doesn't fix 
anything, as the early interrupts still happen, just maybe a little less 
frequently.  I suspect the downgrade from Ultra/66 to Ultra/33 may have 
had more to do with that... I'm not sure why all the other DMA errors 
don't make it downgrade?

--rafal