Red Hat Bugzilla – Bug 241899
ACPI3.0b Package parameter support
Last modified: 2010-10-22 11:24:18 EDT
Description of problem:
The 2.6.18 acpi implementation does not support method parameters of 'package'
type. For e.g. if a device defines a _DSM method (device specific method) and
that method is invoked from the driver, messages like the following are logged:
ACPI Error (utcopy-0610): Packages as parameters not implemented! 
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Create/use an ACPI device that defines a _DSM method
2. Invoke the _DSM method from the driver
Messages like that above are logged.
Succesful return from the _DSM method.
Support for package parameters was added to Len Brown's ACPI -test- tree in the
20070508 ACPI-CA code drop. The code is not yet in mainline but the attached
patch contains just the changes required to support package parameters.
DSM argument definitions (ACPI3.0b):
9.15.1 _DSM (Device Specific Method)
This optional object is a control method that enables devices to provide device
specific control functions
that are consumed by the device driver.
Arg0 (Buffer): UUID
Arg1 (Integer): Revision ID
Arg2 (Integer): Function Index
Arg3 (Package): Arguments
Created attachment 155824 [details]
Patch from acpi-test tree for package parameter support
Code is upstream as of .22, no devel ACK for R5.1. Feature will be
considered/targeted for inclusion in R5.2.
How is this hardware affected by this issue? Is it just error messages in the
log? Or is the hardware non-functional in some way? Please provide a detailed
description on the extent of this problem.
(In reply to comment #6)
> How is this hardware affected by this issue? Is it just error messages in the
> log? Or is the hardware non-functional in some way? Please provide a detailed
> description on the extent of this problem.
Brian, this might already be in one of the private comments but to answer this
question please see issue-tracker #119834
Exception denied for R5.1, moving out to R5.2.
blocks - 223289: FEAT:RHEL5.2: P-state Support; 844; BCS, HP tracking in Issue
Please let me know if there is anything I can do to help get this patch into
FYI The upstream patch corresponding to this is available at
Any idea when you may get to this?
re-assign to Brian.
You can download this test kernel from http://people.redhat.com/dzickus/el5
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