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path: root/drivers/acpi/acpica/exoparg3.c
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-rw-r--r--drivers/acpi/acpica/exoparg3.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/acpi/acpica/exoparg3.c b/drivers/acpi/acpica/exoparg3.c
index b813fed95e56..1c64a988cbee 100644
--- a/drivers/acpi/acpica/exoparg3.c
+++ b/drivers/acpi/acpica/exoparg3.c
@@ -114,7 +114,18 @@ acpi_status acpi_ex_opcode_3A_0T_0R(struct acpi_walk_state *walk_state)
/* Might return while OS is shutting down, just continue */
ACPI_FREE(fatal);
- break;
+ goto cleanup;
+
+ case AML_EXTERNAL_OP:
+ /*
+ * If the interpreter sees this opcode, just ignore it. The External
+ * op is intended for use by disassemblers in order to properly
+ * disassemble control method invocations. The opcode or group of
+ * opcodes should be surrounded by an "if (0)" clause to ensure that
+ * AML interpreters never see the opcode.
+ */
+ status = AE_OK;
+ goto cleanup;
default: