Re: Greetings. Having a FIFO overrun when my amplc_pci230 card is set on the other side of a PCI bridge

Cool. I will try this on Monday. 

Thanks a bunch,
mike


On Fri, 2006-01-20 at 13:48 +0000, Ian Abbott wrote:
> On 04/01/06 15:54, Michael R. Head wrote:
> > Hello, I'm having some issues with my amplc_pci230 card. I have a 4U box
> > here that has a PCI bus (#2) with a Pericom Semiconductor PCI to PCI
> > bridge to another PCI bus (#3). When my PCI230 card is on bus #2, it
> > functions just fine with comedi (comedi_test runs and appears to
> > complete successfully). When I shut down and plug the card into a slot
> > on bus #3, I get nonstop messages in /var/log/messages (this is a RHEL 3
> > box)  once the driver is loaded.
> > 
> > kernel: comedi0: amplc_pci230: FIFO overrun
> > ....
> > 
> > Any hints or clues? Right now, it's the only thing plugged into any of
> > the PCI slots on the motherboard. 
> 
> If you haven't given up on this yet, could you try the attached patch? 
> It does the following:
> 
> 1. Initializes the board's INT_SCE register before hooking up the
>     interrupt routine.
> 2. Corrects the error handling in pci230_handle_ai() to stop the ADC
>     interrupt being enabled after an error!
> 3. Minor clean-up in the interrupt routine to silence a compiler warning
>     about an unused variable when building for a 2.4 kernel.
> 
> I don't know why the behaviour should differ depending on the which PCI 
> bus the card is attached to, but hopefully the patch will restore some 
> sanity!
> 
> If you try the patch, please let me know how you get on, preferably on 
> the mailing list.
> 
-- 
Michael R. Head <burner_at_suppressingfire.org>
GPG: http://www.suppressingfire.org/~burner/gpg.key.txt [0x4C9DA1D0]