From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CD468C4332B for ; Wed, 18 Mar 2020 20:58:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9BCAC20A8B for ; Wed, 18 Mar 2020 20:58:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584565120; bh=Hv4hSMvpfN+LKV5X3UisRwpdnw220sQeTZY7RQMEfz4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=tRR50iByp2Zfx2JcAE8W+CzINkJ2xGBpMtBC0iCRF68zKm4RKzHQ1tGycAjZ1ccdj wUxAas89upPVxvxBLx8a5SV99TptX2i2CK6o3DJR7CD+ygWXvYX+Nrb4bmqhzDgBij S0RiWWV2xwnZ5mRsuLJ6mIPA3+DHZ6uY8zORyE9w= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727243AbgCRU6g (ORCPT ); Wed, 18 Mar 2020 16:58:36 -0400 Received: from mail.kernel.org ([198.145.29.99]:58514 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728762AbgCRU5C (ORCPT ); Wed, 18 Mar 2020 16:57:02 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 12E6020BED; Wed, 18 Mar 2020 20:57:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1584565021; bh=Hv4hSMvpfN+LKV5X3UisRwpdnw220sQeTZY7RQMEfz4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cLc1X39Wt705wwp/cUSLcTcbR4DkUybNJsfI1YjJK1RoXSvwmw1zoJMfsnOwPmfMy +MrEJshfQA4ooa3xkh3LCwPiQprra5doOdMSKdH5MBb2Ma6JMPdYwFZE+gIXhe91ph qr6hnZzGF7ze5DN6LvfxFdlFDKR2W5PqRRo+kIzI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hans de Goede , Lu Baolu , Joerg Roedel , Sasha Levin , iommu@lists.linux-foundation.org Subject: [PATCH AUTOSEL 4.4 11/12] iommu/vt-d: quirk_ioat_snb_local_iommu: replace WARN_TAINT with pr_warn + add_taint Date: Wed, 18 Mar 2020 16:56:47 -0400 Message-Id: <20200318205648.17937-11-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200318205648.17937-1-sashal@kernel.org> References: <20200318205648.17937-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hans de Goede [ Upstream commit 81ee85d0462410de8eeeec1b9761941fd6ed8c7b ] Quoting from the comment describing the WARN functions in include/asm-generic/bug.h: * WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report * significant kernel issues that need prompt attention if they should ever * appear at runtime. * * Do not use these macros when checking for invalid external inputs The (buggy) firmware tables which the dmar code was calling WARN_TAINT for really are invalid external inputs. They are not under the kernel's control and the issues in them cannot be fixed by a kernel update. So logging a backtrace, which invites bug reports to be filed about this, is not helpful. Fixes: 556ab45f9a77 ("ioat2: catch and recover from broken vtd configurations v6") Signed-off-by: Hans de Goede Acked-by: Lu Baolu Link: https://lore.kernel.org/r/20200309182510.373875-1-hdegoede@redhat.com BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=701847 Signed-off-by: Joerg Roedel Signed-off-by: Sasha Levin --- drivers/iommu/intel-iommu.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a2005b82ec8ff..3a97225d0b182 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3949,10 +3949,11 @@ static void quirk_ioat_snb_local_iommu(struct pci_dev *pdev) /* we know that the this iommu should be at offset 0xa000 from vtbar */ drhd = dmar_find_matched_drhd_unit(pdev); - if (WARN_TAINT_ONCE(!drhd || drhd->reg_base_addr - vtbar != 0xa000, - TAINT_FIRMWARE_WORKAROUND, - "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n")) + if (!drhd || drhd->reg_base_addr - vtbar != 0xa000) { + pr_warn_once(FW_BUG "BIOS assigned incorrect VT-d unit for Intel(R) QuickData Technology device\n"); + add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_STILL_OK); pdev->dev.archdata.iommu = DUMMY_DEVICE_DOMAIN_INFO; + } } DECLARE_PCI_FIXUP_ENABLE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB, quirk_ioat_snb_local_iommu); -- 2.20.1