On Tuesday 25 July 2006 7:54 am, Alan Stern wrote:
> On Tue, 25 Jul 2006, Matthias Urlichs wrote:
>
> > This is the perennial "we have an OHCI interface on a PCMCIA card. We
> > pull the card. The kernel crashes / hangs / whatever" problem.
> >
> > [ INFO: inconsistent lock state ] -- details below.
Why do you say "perennial" as if this is a problem that's been reported
often? If it had been, surely I'd have heard of it ... yet these lock
debug tools are new, and ISTR aren't free of reporting false positives.
Such problems could _not_ have been reported before 2.6.18-early ...
Plus, this trace clearly shows the issue is with UHCI, not OHCI! So why
are you saying it's an OHCI problem?? Your bug description and diagnosis
skill seem to have gone goofy ... maybe you need more coffee this early in
the morning! :)
> It could have happened any time a USB controller was turned off.
Right, and I've seen the warning with with OHCI and EHCI, as well as
(now) with the UHCI driver as shown in this trace. The URB seems to
be the root hub status URB, every time I've seen the message.
The message is just a warning, and isn't actually reflecting any
corruption ... every time I've seen it ("rmmmod xxx-hcd"), things
worked just fine. So the short response is to ignore it for now, or
not turn on those (new and not wholly trustworthy) lock debug tools.
> Does the following patch help?
The theory behind the patch being ... what?
- Dave
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