Red Hat Bugzilla – Bug 96984
(USB)Kernel oops with 2.4.20-18.7 and Speedtouch USB ADSL Modem
Last modified: 2007-04-18 12:54:40 EDT
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Description of problem:
I am using version 1.2 beta 1 of the Speedtouch USB driver from
http://speedtouch.sourceforge.net with a Speedtouch USB modem
This was working without any problems with kernel 2.4.20-13.7.
I have just upgraded to the latest errata kernel 2.4.20-18.7 and I now get a
kernel oops when starting the driver (starting the modem_run program which
uploads the firmware to the device).
I have attached the relevant portion from /var/log/messages to this bug.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Install Speedtouch 1.2 beta 1 drivers.
2. Upgrade to errata kernel 2.4.20-18.7.
3. Start modem_run.
I've attached the messages that usually get logged when starting the Speedtouch
modem with kernel 2.4.20-13.7.
My USB card is a PCI card. The following is reported in /proc/pci (when running
Bus 0, device 15, function 0:
USB Controller: OPTi Inc. 82C861 (rev 16).
Master Capable. Latency=64.
Non-prefetchable 32 bit memory at 0xffbea000 [0xffbeafff].
The natsemi module referenced is the driver for eth0.
Created attachment 92243 [details]
Kernel oops on starting modem_run
Created attachment 92244 [details]
Messages logged when starting the Speedtouch modem with kernel 2.4.20-13.7
You should report speedtouch problems to the speedtouch maintainers not to Red Hat.
I have reported this to the Speedtouch maintainers too.
I thought it could be a problem with the latest errata kernel because the
RHSA-2003:187-25 advisory lists 'Driver bug fixes are included... for the USB
ohci driver'. This is a kernel oops that involves the USB ohci driver, so I
thought something may have been broken between 2.4.20-13.7 and 2.4.20-18.7.
Just to clarify - the Speedtouch USB driver I am using is a userspace driver
(the ATM connection is terminated in userspace). This crash occurs in a clean
(no patches applied) Red Hat kernel.
No problem, reopening. It is possible that the ohci fix is at fault.
Unfortunately, it was a very important fix. I cannot back it out.
I've also seen this problem (but haven't tested on the 2.4.20-13.7 kernel).
When using usb-uhci there is no kernel oops on my system here. The system I
have seen the oops on was either using usb-ohci or ehci-hcd. I'm pretty sure
it was the ohci usb controller. Unfortuately it's a remote box so I can't
easily check now.
I faced the same problem using RedHat 9.0 after upgrading to from 2.4.20-8 to
2.4.20-18.9 and I have usb-ohci
This is still a problem with the new errata kernel 2.4.20-19.7
Thanks, I know. I didn't fix it yet.
Created attachment 93158 [details]
Test fix #1 (ohci6)
Original entry for the ohci disaster was in bug 84814, in case anyone
is wondering why we cannot just back out ohci changes from 2.4.20-13.