ATAng no PIO fallback?

[Anish Mistry]

On Tuesday 26 August 2003 10:27 pm, Anish Mistry wrote:
> After removing atapicam from my kernel, so no panics on boot I decided to 
see
> it DMA was fixed for my CD/DVD combo drive.  I changed the
> hw.ata.atapi_dma="0"
> to hw.ata.atapi_dma="1" in my /boot/loader.conf.  After a reboot I tried to
> access my cdrom drive, and got the following error messages, which is very
> similar to the messages when trying to dma before ATAng:
> Aug 26 22:09:34 littleguy kernel: acd0: WARNING - READ_CD recovered from
> missing interrupt
> Aug 26 22:09:34 littleguy kernel: acd0: WARNING - READ_CD UDMA ICRC error
> (retrying request)
> 
> The problem is that before with DMA enabled it would try dma a few times 
fail,
> and then fall back to PIO, whcih though annoying still left the drive in a
> useable condition.  Where as now the drive just stays stuck and unusable.
> 
> .....
Anyone thinking about looking into this?  I'll just submit a PR, in a day or 2 
if there is no resposne.
Thanks,

-- 
Anish Mistry
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