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ACPICA: Expressions in package elements are not supported

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Return AE_SUPPORT if encountered, fixes a previous fault if
encountered.

Note: Other ACPI implementations do not support this type of
construct.

Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Erik Schmauss <erik.schmauss@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Bob Moore 2018-12-13 12:30:30 -08:00 committed by Rafael J. Wysocki
parent c47511760e
commit 6d3decda04
1 changed files with 26 additions and 0 deletions
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26
drivers/acpi/acpica/dspkginit.c
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@ -152,6 +152,32 @@ acpi_ds_build_internal_package_obj(struct acpi_walk_state *walk_state,
*/
for (i = 0; arg && (i < element_count); i++) {
if (arg->common.aml_opcode == AML_INT_RETURN_VALUE_OP) {
if (!arg->common.node) {
/*
* This is the case where an expression has returned a value.
* The use of expressions (term_args) within individual
* package elements is not supported by the AML interpreter,
* even though the ASL grammar supports it. Example:
*
* Name (INT1, 0x1234)
*
* Name (PKG3, Package () {
* Add (INT1, 0xAAAA0000)
* })
*
* 1) No known AML interpreter supports this type of construct
* 2) This fixes a fault if the construct is encountered
*/
ACPI_EXCEPTION((AE_INFO, AE_SUPPORT,
"Expressions within package elements are not supported"));
/* Cleanup the return object, it is not needed */
acpi_ut_remove_reference(walk_state->results->
results.obj_desc[0]);
return_ACPI_STATUS(AE_SUPPORT);
}
if (arg->common.node->type == ACPI_TYPE_METHOD) {
/*
* A method reference "looks" to the parser to be a method