From: David Brownell <david-b@pacbell.net>
To: Kris Karas <ktk@enterprise.bidmc.harvard.edu>
Cc: linux-usb-devel@lists.sourceforge.net,
lkml <linux-kernel@vger.kernel.org>
Subject: Re: 2.4.19pre2++ USB EHCI-HCD -> auto-reboot
Date: Sun, 21 Apr 2002 19:43:10 -0700 [thread overview]
Message-ID: <109b01c1e9a7$71ada460$6800000a@brownell.org> (raw)
> I need some tips on how to debug (or help others debug) a problem
> I am seeing with the EHCI-HCD driver introduced in 2.4.19-pre2.
Hmm ... that "auto-reboot" has to stop before you can get
much of anywhere! I've not seen that kind of failure since
ehci-hcd was first starting to enumerate devices.
I'd hope that running against 2.5.8 (which has a somewhat
more current EHCI driver in any case), with lots of kernel
debugging features (notably slab debugging, which also
poisons the pci_pool memory used by the USB HCDs),
would give you a more friendly failure mode. Basically
the same stuff exists on 2.4.19-pre, but you will need
to tweak the PCIPOOL_DEBUG stuff in drivers/pci/pci.c
to make the extra poisoning happen. KDB can help too.
Once a few more tidbits of info become available, I can
help figure out what's up. (To be honest, it's been quite a
while since anyone has reported anything but success with
ehci-hcd. Some variety is perversely refreshing ... :)
- Dave
next reply other threads:[~2002-04-22 2:45 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-22 2:43 David Brownell [this message]
-- strict thread matches above, loose matches on Subject: below --
2002-04-21 23:49 Kris Karas
2002-04-22 1:41 ` Greg KH
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