linux-2.5.8-pre1/drivers/usb/uhci.o locks up hard

linux-2.5.8-pre1/drivers/usb/uhci.o locks up hard

[Adam J. Richter]

	I have not analyzed this problem fully and it's not particularly
urgent, but I thought I ought to report it just to make it part of
the knowledge base.

	linux-2.5.8-pre1/drivers/usb/uhci.o locks up hard after printing
"hub.c: 2 ports detected" on both my Sony Picturebook PCG-C1VN (Transmeta)
and a Pentium 3 desktop machine with a VIA chipset.  Oddly, uhci.o seems
to be fine on my older Kapok 1100m Pentium 2 notebook.  I believe uhci.o
gave me null pointer dereferences or something similar on my Picturebook
under 2.5.7 also.

	usb-uhci seems to be fine on all of these machines, although I have
not tried doing anything with a USB device other than looking at the
device ID information.

Adam J. Richter     __     ______________   4880 Stevens Creek Blvd, Suite 104
adam@yggdrasil.com     \ /                  San Jose, California 95129-1034
+1 408 261-6630         | g g d r a s i l   United States of America
fax +1 408 261-6631      "Free Software For The Rest Of Us."

Re: [linux-usb-devel] linux-2.5.8-pre1/drivers/usb/uhci.o locks up hard

[Greg KH]

On Thu, Apr 04, 2002 at 06:10:36AM -0800, Adam J. Richter wrote:
> 	I have not analyzed this problem fully and it's not particularly
> urgent, but I thought I ought to report it just to make it part of
> the knowledge base.
> 
> 	linux-2.5.8-pre1/drivers/usb/uhci.o locks up hard after printing
> "hub.c: 2 ports detected" on both my Sony Picturebook PCG-C1VN (Transmeta)
> and a Pentium 3 desktop machine with a VIA chipset.  Oddly, uhci.o seems
> to be fine on my older Kapok 1100m Pentium 2 notebook.  I believe uhci.o
> gave me null pointer dereferences or something similar on my Picturebook
> under 2.5.7 also.

Are you running with CONFIG_DEBUG_SLAB enabled and CONFIG_SMP?
I have the same problem running with this configuration, and the uhci.c
driver author knows about it and is working on tracking down the
problem.

thanks,

greg k-h