Bug 10204

Summary: WARNING trace for ACPI ECDT
Product: ACPI Reporter: Alan Jenkins (alan-jenkins)
Component: Config-TablesAssignee: Alexey Starikovskiy (astarikovskiy)
Status: CLOSED DUPLICATE    
Severity: normal CC: akpm, arjan, bunk, mingo
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.25-rc4 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 9832    
Attachments: Complete boot log, including WARNING
Kernel configuration
acpidump output

Description Alan Jenkins 2008-03-09 04:35:24 UTC 
Latest working kernel version: 2.6.24.3
Earliest failing kernel version: 2.6.25-rc4
Distribution: Ubuntu
Hardware Environment: AMD64
Software Environment: -
Problem Description:

WARNING with backtrace during ACPI initialisation.  Appears to happen while parsing the EC table.

Steps to reproduce:

Boot.  I rebooted again just to be sure, and received the same WARNING.
Comment 1 Alan Jenkins 2008-03-09 04:36:33 UTC 
Created attachment 15185 [details]
Complete boot log, including WARNING
Comment 2 Alan Jenkins 2008-03-09 04:37:30 UTC 
Created attachment 15186 [details]
Kernel configuration
Comment 3 Alexey Starikovskiy 2008-03-09 14:06:10 UTC 
You don't have ECDT, so not parsing of EC table is possible.
Warning happens then we do scan of DSDT for EC device.
Please send output from acpidump.
Comment 4 Alan Jenkins 2008-03-09 14:10:40 UTC 
Created attachment 15191 [details]
acpidump output

Here it is
Comment 5 Alexey Starikovskiy 2008-03-09 14:11:57 UTC 
Looks like fcea424d31868a78366ad5ee0cb3cc2a4cbe689b is to be blamed.
Comment 6 Alexey Starikovskiy 2008-03-09 14:18:27 UTC 
It also looks possible to just drop changes to ioremap.c to return to pre-patch behavior of ACPI/EC.
Comment 7 Rafael J. Wysocki 2008-03-09 15:15:39 UTC 
(In reply to comment #5)
> Looks like fcea424d31868a78366ad5ee0cb3cc2a4cbe689b is to be blamed.

commit fcea424d31868a78366ad5ee0cb3cc2a4cbe689b
Author: Arjan van dev Ven <arjan@linux.intel.com>
Date:   Wed Feb 6 05:16:00 2008 +0100

    fix historic ioremap() abuse in AGP

Arjan, Ingo, Andrew, are we going to fix that somehow before 2.6.25?
Comment 8 Rafael J. Wysocki 2008-03-09 15:17:25 UTC 

*** This bug has been marked as a duplicate of bug 10104 ***