Re: DMA interaction causes lockup under 2.0.32?

[mlord]

Don Fisher wrote:
> 
> I have been working on a driver for a DT3155 video frame
> grabber.  The driver would lock up my machine after a few
> seconds of operation (power switch type lockup).  The
> problem was eliminated by turning off the DMA (hdparm) on my
> IDE disk drives.

Mmm.. ensure that your frame-grabber driver has timers set
to wake it up in the event that the scheduled DMA operation
never completes.. if you're missing those, then that's why
the sucker's locking up (the IDE driver has them, and other
safeguards).
-- 
[e-mail]
The Linux IDE guy