Re: ohci1394 regression in 2.6.19-rc1 (was Re: Merge window closed: v2.6.19-rc1)

Alistair John Strachan
2006-10-05T20:30:33Z

On Thursday 05 October 2006 19:56, Stefan Richter wrote:
> Alistair John Strachan wrote:
> > Booted fine here, but I've got a few strange messages from the firewire
> > subsystem that weren't present in 2.6.18. I think it marginally slows
> > down boot up, but I could just be imagining it.
> >
> > [alistair] 16:04 [~] dmesg | grep 1394
> > ohci1394: fw-host0: OHCI-1394 1.1 (PCI): IRQ=[19]
> > MMIO=[dffff000-dffff7ff] Max Packet=[2048] IR/IT contexts=[4/8]
> > ohci1394: fw-host1: OHCI-1394 1.1 (PCI): IRQ=[17]
> > MMIO=[dfffc000-dfffc7ff] Max Packet=[2048] IR/IT contexts=[4/8]
> > ohci1394: fw-host0: Running dma failed because Node ID is not valid
> > ohci1394: fw-host0: AT dma reset ctx=0, aborting transmission
> > ieee1394: Current remote IRM is not 1394a-2000 compliant, resetting...
> > ieee1394: Host added: ID:BUS[0-00:1023] GUID[00023c0091023fd7]
> > ieee1394: Host added: ID:BUS[1-00:1023] GUID[000129200003d023]
>
> Thanks for the quick report. Could you please test the following, each
> one separately?
>
> A. Configure PCI_MULTITHREAD_PROBE=n

Not set.

> B. Revert patch "Initialize ieee1394 early when built in"
> http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=comm
>itdiff_plain;h=8df4083c5291b3647e0381d3c69ab2196f5dd3b7

Firewire isn't built in. I assume therefore this would have no effect.

> I don't see how any other ohci1394 patch after 2.6.18 could lead up to
> that message. I also don't understand what causes this glitch. At least
> it seems recoverable, according to the "Host added" lines.

I haven't tried to use it, but I agree that the outcome is similar. I
recompiled with excessive debug output on 2.6.19-rc1, and uploaded the
configs for 2.6.19-rc1 and 2.6.18, and the corresponding dmesg outputs. As
you can see, 2.6.18 does not exhibit any problems.

--
Cheers,
Alistair.

Final year Computer Science undergraduate.
1F2 55 South Clerk Street, Edinburgh, UK.