Bug 12363 - Loading iTCO_wdt.ko on 2.6.28 hangs (old) Dell Latitude
Summary: Loading iTCO_wdt.ko on 2.6.28 hangs (old) Dell Latitude
Status: CLOSED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: Watchdog (show other bugs)
Hardware: All Linux
: P1 blocking
Assignee: Wim Van Sebroeck
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2009-01-05 05:13 UTC by Rutger Nijlunsing
Modified: 2009-02-19 11:38 UTC (History)
0 users

See Also:
Kernel Version: 2.6.28
Subsystem:
Regression: Yes
Bisected commit-id:

Attachments
normal 'dmesg' output when watchdog not loaded (32.49 KB, application/octet-stream)
2009-01-05 05:16 UTC, Rutger Nijlunsing 		Details
.config of kernel (79.78 KB, application/xml)
2009-01-05 05:19 UTC, Rutger Nijlunsing 		Details
iTCO_wdt.c with extra debugging but without SMI_EN stuff in start and stop (24.73 KB, text/x-csrc)
2009-01-06 13:34 UTC, Wim Van Sebroeck 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Rutger Nijlunsing 2009-01-05 05:13:16 UTC 
Latest working kernel version: 2.6.27
Earliest failing kernel version: 2.6.28
Distribution: Debian Sid
Hardware Environment: Dell Latitude with ICH2-M TCO device (version 1)
Software Environment:
Problem Description: Loading iTCO_wdt.ko hangs kernel hard: no ping, no keyboard, no sysrq response.

Steps to reproduce:
- build and run pristine 2.6.28 
- insmod iTCO_wdt.ko
Comment 1 Rutger Nijlunsing 2009-01-05 05:16:44 UTC 
Created attachment 19660 [details]
normal 'dmesg' output when watchdog not loaded
Comment 2 Rutger Nijlunsing 2009-01-05 05:19:23 UTC 
Created attachment 19661 [details]
.config of kernel
Comment 3 Wim Van Sebroeck 2009-01-06 13:34:31 UTC 
Created attachment 19683 [details]
iTCO_wdt.c with extra debugging but without SMI_EN stuff in start and stop

Hi Rutger,

Can you test this code?

Thanks in advance,
Wim.
PS: which model is this old Dell?
Comment 4 Johannes Dewender 2009-01-22 10:37:40 UTC 
Latest working kernel version: 2.6.27.10
Earliest failing kernel version: 2.6.28
Distribution: Arch
Hardware Environment: Intel i815 Chipset with an Intel 82801BA-ICH2 device. (which I use with a PIII 866 MHz)
Problem Description: Loading iTCO_wdt.ko hangs kernel, hard reset necessary

I compiled the mentioned 1.04-debug driver.
No kernel problems. dmesg out after modprobe iTCO_vendor_support and modprobe iTCO_wdt:

iTCO_wdt: Intel TCO WatchDog Timer Driver v1.04-debug
iTCO_wdt: TCOBASE=0xf860
iTCO_wdt: NO_REBOOT bit unset
iTCO_wdt: NO_REBOOT bit set
iTCO_wdt: SMI_EN=0x0000002b
iTCO_wdt: Found a ICH2 TCO device (Version=1, TCOBASE=0xf860)
iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
Comment 5 Wim Van Sebroeck 2009-02-19 11:38:27 UTC 
Patch is in Linus Main tree (part of v2.6.29-rc5).
Patch will also be incorporated into the stable tree.
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