From patchwork Wed Aug 10 04:01:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Rui Y" X-Patchwork-Id: 9272639 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id BD55C60467 for ; Wed, 10 Aug 2016 04:18:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A673228389 for ; Wed, 10 Aug 2016 04:18:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 94B942842B; Wed, 10 Aug 2016 04:18:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 30DA128389 for ; Wed, 10 Aug 2016 04:18:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751550AbcHJESf (ORCPT ); Wed, 10 Aug 2016 00:18:35 -0400 Received: from mga09.intel.com ([134.134.136.24]:30603 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751311AbcHJESc (ORCPT ); Wed, 10 Aug 2016 00:18:32 -0400 Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga102.jf.intel.com with ESMTP; 09 Aug 2016 21:18:32 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.28,497,1464678000"; d="scan'208";a="1038382061" Received: from wr-optiplex-9010.xa.intel.com ([10.238.71.86]) by fmsmga002.fm.intel.com with ESMTP; 09 Aug 2016 21:18:29 -0700 From: Rui Wang To: helgaas@kernel.org, tglx@linutronix.de, rjw@rjwysocki.net Cc: tony.luck@intel.com, bhelgaas@google.com, linux-acpi@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, rui.y.wang@intel.com Subject: [PATCH v3 5/5] x86/ioapic: Fix ioapic failing to request resource Date: Wed, 10 Aug 2016 12:01:58 +0800 Message-Id: <1470801718-29004-6-git-send-email-rui.y.wang@intel.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1470801718-29004-1-git-send-email-rui.y.wang@intel.com> References: <1470801718-29004-1-git-send-email-rui.y.wang@intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP handle_ioapic_add() uses request_resource() to request ACPI "_CRS" resources. This can fail with the following error message: [ 247.325693] ACPI: \_SB_.IIO1.AID1: failed to insert resource This happens when there are multiple IOAPICs and DSDT groups their "_CRS" resources as the children of a parent resource, as seen from /proc/iomem: fec00000-fecfffff : PNP0003:00 fec00000-fec003ff : IOAPIC 0 fec01000-fec013ff : IOAPIC 1 fec40000-fec403ff : IOAPIC 2 In this case request_resource() fails because there's a conflicting resource which is the parent (fec0000-fecfffff). Fix it by using insert_resource() which can request resources by taking the conflicting resource as the parent. Signed-off-by: Rui Wang --- drivers/acpi/ioapic.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/ioapic.c b/drivers/acpi/ioapic.c index ee20111..6d7ce6e 100644 --- a/drivers/acpi/ioapic.c +++ b/drivers/acpi/ioapic.c @@ -146,10 +146,12 @@ static acpi_status handle_ioapic_add(acpi_handle handle, u32 lvl, crs_res = &ioapic->res; acpi_walk_resources(handle, METHOD_NAME__CRS, setup_res, crs_res); + crs_res->name = type; + crs_res->flags |= IORESOURCE_BUSY; if (crs_res->flags == 0) { acpi_handle_warn(handle, "failed to get resource\n"); goto exit_release; - } else if (request_resource(&iomem_resource, crs_res)) { + } else if (insert_resource(&iomem_resource, crs_res)) { acpi_handle_warn(handle, "failed to insert resource\n"); goto exit_release; }