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ACPICA: Fix for Alias operator to see target child objects

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Fixed a problem with the Alias operator when the target of the
alias is a named ASL operator that opens a new scope -- Scope,
Device, PowerResource, Processor, and ThermalZone. In these cases,
any children of the original operator could not be accessed via
the alias, potentially causing unexpected AE_NOT_FOUND exceptions.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Bob Moore
2008-04-10 19:06:39 +04:00
committed by Len Brown
parent 1c12a7dde1
commit 53cf174409
2 changed files with 74 additions and 40 deletions
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20
drivers/acpi/executer/excreate.c
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@@ -96,16 +96,28 @@ acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
* to the original Node.
*/
switch (target_node->type) {
/* For these types, the sub-object can change dynamically via a Store */
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
case ACPI_TYPE_PACKAGE:
case ACPI_TYPE_BUFFER_FIELD:
/*
* These types open a new scope, so we need the NS node in order to access
* any children.
*/
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_POWER:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
case ACPI_TYPE_LOCAL_SCOPE:
/*
* The new alias has the type ALIAS and points to the original
* NS node, not the object itself. This is because for these
* types, the object can change dynamically via a Store.
* NS node, not the object itself.
*/
alias_node->type = ACPI_TYPE_LOCAL_ALIAS;
alias_node->object =
@@ -115,9 +127,7 @@ acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state)
case ACPI_TYPE_METHOD:
/*
* The new alias has the type ALIAS and points to the original
* NS node, not the object itself. This is because for these
* types, the object can change dynamically via a Store.
* Control method aliases need to be differentiated
*/
alias_node->type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
alias_node->object =