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| author | Bob Moore <robert.moore@intel.com> | 2008-04-10 19:06:39 +0400 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-04-22 14:29:24 -0400 |
| commit | 53cf174409a24e8388e1d554d27436275fc81fe7 (patch) | |
| tree | 52883d192ba1b4bd978a8ca9d30af1e533679e70 /drivers/acpi/executer | |
| parent | 1c12a7dde1752f2c40fe170cabff463a0b362720 (diff) | |
| download | blackbird-op-linux-53cf174409a24e8388e1d554d27436275fc81fe7.tar.gz blackbird-op-linux-53cf174409a24e8388e1d554d27436275fc81fe7.zip | |
ACPICA: Fix for Alias operator to see target child objects
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>
Diffstat (limited to 'drivers/acpi/executer')
| -rw-r--r-- | drivers/acpi/executer/excreate.c | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/drivers/acpi/executer/excreate.c b/drivers/acpi/executer/excreate.c index 6e9a23e47fef..b3914395851b 100644 --- a/drivers/acpi/executer/excreate.c +++ b/drivers/acpi/executer/excreate.c @@ -96,6 +96,9 @@ 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: @@ -103,9 +106,18 @@ acpi_status acpi_ex_create_alias(struct acpi_walk_state *walk_state) 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 = |
