This is a note to let you know that I've just added the patch titled
ACPICA: Fix to allow region arguments to reference other scopes
to the 3.2-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
acpica-fix-to-allow-region-arguments-to-reference-other-scopes.patch
and it can be found in the queue-3.2 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From 8931d9ea78848b073bf299594f148b83abde4a5e Mon Sep 17 00:00:00 2001
From: Lin Ming <[email protected]>
Date: Mon, 28 Nov 2011 09:46:02 +0800
Subject: ACPICA: Fix to allow region arguments to reference other scopes
From: Lin Ming <[email protected]>
commit 8931d9ea78848b073bf299594f148b83abde4a5e upstream.
Allow referenced objects to be in a different scope.
http://www.acpica.org/bugzilla/show_bug.cgi?id=937
http://marc.info/?l=linux-acpi&m=131636632718222&w=2
ACPI Error: [RAMB] Namespace lookup failure, AE_NOT_FOUND (20110112/psargs-359)
ACPI Exception: AE_NOT_FOUND, Could not execute arguments for [RAMW] (Region)
(20110112/nsinit-349)
Scope (_SB)
{
Name (RAMB, 0xDF5A1018)
OperationRegion (\RAMW, SystemMemory, RAMB, 0x00010000)
}
For above ASL code, we need to save scope node(\_SB) to lookup
the argument node(\_SB.RAMB).
Reported-by: Jim Green <[email protected]>
Signed-off-by: Lin Ming <[email protected]>
Signed-off-by: Bob Moore <[email protected]>
Signed-off-by: Len Brown <[email protected]>
Cc: Herton Ronaldo Krzesinski <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/acpi/acpica/acobject.h | 1 +
drivers/acpi/acpica/dsargs.c | 2 +-
drivers/acpi/acpica/excreate.c | 6 ++++++
3 files changed, 8 insertions(+), 1 deletion(-)
--- a/drivers/acpi/acpica/acobject.h
+++ b/drivers/acpi/acpica/acobject.h
@@ -358,6 +358,7 @@ typedef enum {
*/
struct acpi_object_extra {
ACPI_OBJECT_COMMON_HEADER struct acpi_namespace_node *method_REG;
/* _REG method for this region (if any) */
+ struct acpi_namespace_node *scope_node;
void *region_context; /* Region-specific data */
u8 *aml_start;
u32 aml_length;
--- a/drivers/acpi/acpica/dsargs.c
+++ b/drivers/acpi/acpica/dsargs.c
@@ -384,7 +384,7 @@ acpi_status acpi_ds_get_region_arguments
/* Execute the argument AML */
- status = acpi_ds_execute_arguments(node, node->parent,
+ status = acpi_ds_execute_arguments(node, extra_desc->extra.scope_node,
extra_desc->extra.aml_length,
extra_desc->extra.aml_start);
if (ACPI_FAILURE(status)) {
--- a/drivers/acpi/acpica/excreate.c
+++ b/drivers/acpi/acpica/excreate.c
@@ -330,6 +330,12 @@ acpi_ex_create_region(u8 * aml_start,
region_obj2 = obj_desc->common.next_object;
region_obj2->extra.aml_start = aml_start;
region_obj2->extra.aml_length = aml_length;
+ if (walk_state->scope_info) {
+ region_obj2->extra.scope_node =
+ walk_state->scope_info->scope.node;
+ } else {
+ region_obj2->extra.scope_node = node;
+ }
/* Init the region from the operands */
Patches currently in stable-queue which might be from [email protected] are
queue-3.2/acpica-fix-to-allow-region-arguments-to-reference-other-scopes.patch
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