ACPICA: Update behavior of CopyObject to match ACPI spec (a3df4dad) · Commits · 戴 / test

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>

drivers/acpi/executer/exstore.c

+11 −4

Original line number	Diff line number	Diff line
		@@ -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;
		}

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