From patchwork Fri Jan 9 09:26:37 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Len Brown X-Patchwork-Id: 1501 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n099NxO2003124 for ; Fri, 9 Jan 2009 01:25:05 -0800 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753761AbZAIJ2r (ORCPT ); Fri, 9 Jan 2009 04:28:47 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754128AbZAIJ2q (ORCPT ); Fri, 9 Jan 2009 04:28:46 -0500 Received: from vms173005pub.verizon.net ([206.46.173.5]:56420 "EHLO vms173005pub.verizon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753633AbZAIJ2X (ORCPT ); Fri, 9 Jan 2009 04:28:23 -0500 Received: from localhost.localdomain ([96.237.168.40]) by vms173005.mailsrvcs.net (Sun Java System Messaging Server 6.2-6.01 (built Apr 3 2006)) with ESMTPA id <0KD700EGR6ASOO13@vms173005.mailsrvcs.net> for linux-acpi@vger.kernel.org; Fri, 09 Jan 2009 03:28:05 -0600 (CST) Received: from localhost.localdomain (d975xbx2 [127.0.0.1]) by localhost.localdomain (8.14.2/8.14.2) with ESMTP id n099S3tG011939; Fri, 09 Jan 2009 04:28:03 -0500 Received: (from lenb@localhost) by localhost.localdomain (8.14.2/8.14.2/Submit) id n099S3SF011938; Fri, 09 Jan 2009 04:28:03 -0500 Date: Fri, 09 Jan 2009 04:26:37 -0500 From: Len Brown Subject: [PATCH 35/94] ACPICA: Enhance implicit return mechanism In-reply-to: <1231493256-11678-1-git-send-email-lenb@kernel.org> In-reply-to: To: linux-acpi@vger.kernel.org Cc: Lin Ming , Bob Moore , Len Brown Message-id: <7a4b8131ac7b47feb110b3e0142d4207ee79a025.1231492609.git.len.brown@intel.com> Organization: Intel Open Source Technology Center X-Mailer: git-send-email 1.6.1.76.gc123b References: <1231493256-11678-1-git-send-email-lenb@kernel.org> References: Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Lin Ming For Windows compatibility, return an implicit integer of value zero for methods that have no executable code. A default implicit value of zero is provided for methods. Lin Ming. Signed-off-by: Lin Ming Signed-off-by: Bob Moore Signed-off-by: Len Brown --- drivers/acpi/parser/psxface.c | 16 ++++++++++++++++ 1 files changed, 16 insertions(+), 0 deletions(-) diff --git a/drivers/acpi/parser/psxface.c b/drivers/acpi/parser/psxface.c index 4985ce5..41b0c8c 100644 --- a/drivers/acpi/parser/psxface.c +++ b/drivers/acpi/parser/psxface.c @@ -295,6 +295,22 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info) goto cleanup; } + /* + * Start method evaluation with an implicit return of zero. + * This is done for Windows compatibility. + */ + if (acpi_gbl_enable_interpreter_slack) { + walk_state->implicit_return_obj = + acpi_ut_create_internal_object(ACPI_TYPE_INTEGER); + if (!walk_state->implicit_return_obj) { + status = AE_NO_MEMORY; + acpi_ds_delete_walk_state(walk_state); + goto cleanup; + } + + walk_state->implicit_return_obj->integer.value = 0; + } + /* Parse the AML */ status = acpi_ps_parse_aml(walk_state);