From patchwork Fri Oct 9 14:07:31 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jiang Liu X-Patchwork-Id: 7362021 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 12DAE9F7C9 for ; Fri, 9 Oct 2015 14:05:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 43AC720888 for ; Fri, 9 Oct 2015 14:05:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 52AB82088A for ; Fri, 9 Oct 2015 14:05:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755296AbbJIOEz (ORCPT ); Fri, 9 Oct 2015 10:04:55 -0400 Received: from mga02.intel.com ([134.134.136.20]:34254 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755283AbbJIOEx (ORCPT ); Fri, 9 Oct 2015 10:04:53 -0400 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga101.jf.intel.com with ESMTP; 09 Oct 2015 07:04:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,658,1437462000"; d="scan'208";a="807283744" Received: from gerry-dev.bj.intel.com ([10.238.158.61]) by fmsmga001.fm.intel.com with ESMTP; 09 Oct 2015 07:04:48 -0700 From: Jiang Liu To: Joerg Roedel , Borislav Petkov , Bjorn Helgaas , Daniel Vetter , Alex Deucher , Christian Knig Cc: Jiang Liu , linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-iommu@vger.kernel.org, linux-acpi@vger.kernel.org, x86@kernel.org Subject: [Bugfix v4 1/2] iommu/amd: Prevent binding other PCI drivers to IOMMU PCI devices Date: Fri, 9 Oct 2015 22:07:31 +0800 Message-Id: <1444399652-25920-2-git-send-email-jiang.liu@linux.intel.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1444399652-25920-1-git-send-email-jiang.liu@linux.intel.com> References: <1444386214-26319-1-git-send-email-joro@8bytes.org> <1444399652-25920-1-git-send-email-jiang.liu@linux.intel.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP AMD IOMMU driver makes use of IOMMU PCI devices, so prevent binding other PCI drivers to IOMMU PCI devices. This fixes a bug reported by Boris that system suspend/resume gets broken on AMD platforms. For more information, please refer to: https://lkml.org/lkml/2015/9/26/89 Fixes: 991de2e59090 ("PCI, x86: Implement pcibios_alloc_irq() and pcibios_free_irq()") Signed-off-by: Jiang Liu Cc: Borislav Petkov --- drivers/iommu/amd_iommu_init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 5ef347a13cb5..1b066e7d144d 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -1256,6 +1256,9 @@ static int iommu_init_pci(struct amd_iommu *iommu) if (!iommu->dev) return -ENODEV; + /* Prevent binding other PCI device drivers to IOMMU devices */ + iommu->dev->match_driver = false; + pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET, &iommu->cap); pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,