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

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Message-ID: <45255574.5020203@s5r6.in-berlin.de>
Date:	Thu, 05 Oct 2006 20:56:52 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Alistair John Strachan <s0348365@....ed.ac.uk>
CC:	Linus Torvalds <torvalds@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	bcollins@...ian.org, linux1394-devel@...ts.sourceforge.net
Subject: ohci1394 regression in 2.6.19-rc1 (was Re: Merge window closed: v2.6.19-rc1)

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

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

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.
-- 
Stefan Richter
-=====-=-==- =-=- --=-=
http://arcgraph.de/sr/
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