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authorLin Ming <ming.m.lin@intel.com>2008-04-10 19:06:43 +0400
committerLen Brown <len.brown@intel.com>2008-04-22 14:29:31 -0400
commita3df4dadd446c0d7195f2bbe86dd5174426d8090 (patch)
treef88267fb60e64c5c178ff16568148f45b9326546 /drivers/acpi
parent1d5b285da1893b90507b081664ac27f1a8a3dc5b (diff)
ACPICA: Update behavior of CopyObject to match ACPI spec
Fixed a problem where a CopyObject to RegionField, BankField, and IndexField objects did not perform an implicit conversion as it should. These types must retain their initial type permanently as per the ACPI specification. However, a CopyObject to all other object types should not perform an implicit conversion, as per the ACPI specification. http://www.acpica.org/bugzilla/show_bug.cgi?id=388 Signed-off-by: Lin Ming <ming.m.lin@intel.com> 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')
-rw-r--r--drivers/acpi/executer/exstore.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/acpi/executer/exstore.c b/drivers/acpi/executer/exstore.c
index 725614e277f..36c0fccb137 100644
--- a/drivers/acpi/executer/exstore.c
+++ b/drivers/acpi/executer/exstore.c
@@ -603,10 +603,17 @@ acpi_ex_store_object_to_node(union acpi_operand_object *source_desc,
/* If no implicit conversion, drop into the default case below */
- if ((!implicit_conversion) || (walk_state->opcode == AML_COPY_OP)) {
-
- /* Force execution of default (no implicit conversion) */
-
+ if ((!implicit_conversion) ||
+ ((walk_state->opcode == AML_COPY_OP) &&
+ (target_type != ACPI_TYPE_LOCAL_REGION_FIELD) &&
+ (target_type != ACPI_TYPE_LOCAL_BANK_FIELD) &&
+ (target_type != ACPI_TYPE_LOCAL_INDEX_FIELD))) {
+ /*
+ * Force execution of default (no implicit conversion). Note:
+ * copy_object does not perform an implicit conversion, as per the ACPI
+ * spec -- except in case of region/bank/index fields -- because these
+ * objects must retain their original type permanently.
+ */
target_type = ACPI_TYPE_ANY;
}