diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
index b6534187cd43..fcd94947fedb 100644
--- a/drivers/acpi/acpica/nsxfname.c
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -503,6 +503,7 @@ acpi_status acpi_install_method(u8 *buffer)
 	/* First AML opcode in the table must be a control method */
 
 	parser_state.aml = buffer + sizeof(struct acpi_table_header);
+	parser_state.aml_end = buffer + table->length;
 	opcode = acpi_ps_peek_opcode(&parser_state);
 	if (opcode != AML_METHOD_OP) {
 		return (AE_BAD_PARAMETER);