From patchwork Fri Aug 20 23:54:41 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rafael Wysocki X-Patchwork-Id: 121201 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.4/8.14.3) with ESMTP id o7L0GYNJ009576 for ; Sat, 21 Aug 2010 00:19:56 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751451Ab0HUABg (ORCPT ); Fri, 20 Aug 2010 20:01:36 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:59484 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750843Ab0HUABd (ORCPT ); Fri, 20 Aug 2010 20:01:33 -0400 Received: from localhost (localhost.localdomain [127.0.0.1]) by ogre.sisk.pl (Postfix) with ESMTP id 5406118C32B; Sat, 21 Aug 2010 01:49:28 +0200 (CEST) Received: from ogre.sisk.pl ([127.0.0.1]) by localhost (ogre.sisk.pl [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 22608-08; Sat, 21 Aug 2010 01:49:02 +0200 (CEST) Received: from ferrari.rjw.lan (220-bem-13.acn.waw.pl [82.210.184.220]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ogre.sisk.pl (Postfix) with ESMTP id 53CCE18C4C7; Sat, 21 Aug 2010 01:48:46 +0200 (CEST) From: "Rafael J. Wysocki" To: Hidetoshi Seto Subject: [PATCH 5/10] ACPI / PCI: Do not preserve _OSC control bits returned by a query (v4) Date: Sat, 21 Aug 2010 01:54:41 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.36-rc1-rjw+; KDE/4.4.4; x86_64; ; ) Cc: linux-pm@lists.linux-foundation.org, Kenji Kaneshige , linux-pci@vger.kernel.org, Jesse Barnes , ACPI Devel Maling List , Matthew Garrett References: <201008060303.51224.rjw@sisk.pl> <201008210149.39576.rjw@sisk.pl> In-Reply-To: <201008210149.39576.rjw@sisk.pl> MIME-Version: 1.0 Message-Id: <201008210154.41507.rjw@sisk.pl> X-Virus-Scanned: amavisd-new at ogre.sisk.pl using MkS_Vir for Linux Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Sat, 21 Aug 2010 00:19:59 +0000 (UTC) Index: linux-2.6/drivers/acpi/pci_root.c =================================================================== --- linux-2.6.orig/drivers/acpi/pci_root.c +++ linux-2.6/drivers/acpi/pci_root.c @@ -249,12 +249,8 @@ static acpi_status acpi_pci_query_osc(st status = acpi_pci_run_osc(root->device->handle, capbuf, &result); if (ACPI_SUCCESS(status)) { root->osc_support_set = support; - if (control) { + if (control) *control = result; - } else { - root->osc_control_qry = result; - root->osc_queried = 1; - } } return status; } @@ -409,14 +405,12 @@ acpi_status acpi_pci_osc_control_set(acp goto out; /* Need to query controls first before requesting them */ - if (!root->osc_queried) { - status = acpi_pci_query_osc(root, root->osc_support_set, NULL); - if (ACPI_FAILURE(status)) - goto out; - } - if ((root->osc_control_qry & control_req) != control_req) { - printk(KERN_DEBUG - "Firmware did not grant requested _OSC control\n"); + flags = control_req; + status = acpi_pci_query_osc(root, root->osc_support_set, &flags); + if (ACPI_FAILURE(status)) + goto out; + + if (flags != control_req) { status = AE_SUPPORT; goto out; } Index: linux-2.6/include/acpi/acpi_bus.h =================================================================== --- linux-2.6.orig/include/acpi/acpi_bus.h +++ linux-2.6/include/acpi/acpi_bus.h @@ -377,9 +377,6 @@ struct acpi_pci_root { u32 osc_support_set; /* _OSC state of support bits */ u32 osc_control_set; /* _OSC state of control bits */ - u32 osc_control_qry; /* the latest _OSC query result */ - - u32 osc_queried:1; /* has _OSC control been queried? */ }; /* helper */