From patchwork Tue Feb 2 13:39:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 376065 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=-18.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 5F8F5C433E6 for ; Tue, 2 Feb 2021 15:07:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 34FC364FAB for ; Tue, 2 Feb 2021 15:07:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234047AbhBBPHf (ORCPT ); Tue, 2 Feb 2021 10:07:35 -0500 Received: from mail.kernel.org ([198.145.29.99]:51486 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230094AbhBBOQ2 (ORCPT ); Tue, 2 Feb 2021 09:16:28 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id A36076505D; Tue, 2 Feb 2021 13:54:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1612274048; bh=fGNxcoOBw5SK8+jRNbMJD3FXC3oqvM88gq4ywzwXqSY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jqnTIwyx0oeb0QtcWOC+bfb55aI/5QSKw/ctOoOnKI+9Xwmo76Jy/FUFL5l0xTAu3 DiJcGZSserIagPKY5emXVUJFpFdmsZalgSEoVZXqk/HRYZDKOeSa2iOv+QIpON29no NwtkeZiotM6Rbd1nIaE8VJKTkyJ8cryMRGsspVKE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bartosz Golaszewski , Lu Baolu , David Woodhouse , Joerg Roedel , Filippo Sironi Subject: [PATCH 4.19 32/37] iommu/vt-d: Dont dereference iommu_device if IOMMU_API is not built Date: Tue, 2 Feb 2021 14:39:15 +0100 Message-Id: <20210202132944.273327443@linuxfoundation.org> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210202132942.915040339@linuxfoundation.org> References: <20210202132942.915040339@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Bartosz Golaszewski commit 9def3b1a07c41e21c68a0eb353e3e569fdd1d2b1 upstream. Since commit c40aaaac1018 ("iommu/vt-d: Gracefully handle DMAR units with no supported address widths") dmar.c needs struct iommu_device to be selected. We can drop this dependency by not dereferencing struct iommu_device if IOMMU_API is not selected and by reusing the information stored in iommu->drhd->ignored instead. This fixes the following build error when IOMMU_API is not selected: drivers/iommu/dmar.c: In function ‘free_iommu’: drivers/iommu/dmar.c:1139:41: error: ‘struct iommu_device’ has no member named ‘ops’ 1139 | if (intel_iommu_enabled && iommu->iommu.ops) { ^ Fixes: c40aaaac1018 ("iommu/vt-d: Gracefully handle DMAR units with no supported address widths") Signed-off-by: Bartosz Golaszewski Acked-by: Lu Baolu Acked-by: David Woodhouse Link: https://lore.kernel.org/r/20201013073055.11262-1-brgl@bgdev.pl Signed-off-by: Joerg Roedel [ - context change due to moving drivers/iommu/dmar.c to drivers/iommu/intel/dmar.c - set the drhr in the iommu like in upstream commit b1012ca8dc4f ("iommu/vt-d: Skip TE disabling on quirky gfx dedicated iommu") ] Signed-off-by: Filippo Sironi Signed-off-by: Greg Kroah-Hartman --- drivers/iommu/dmar.c | 3 ++- include/linux/intel-iommu.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-) --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1123,6 +1123,7 @@ static int alloc_iommu(struct dmar_drhd_ } drhd->iommu = iommu; + iommu->drhd = drhd; return 0; @@ -1137,7 +1138,7 @@ error: static void free_iommu(struct intel_iommu *iommu) { - if (intel_iommu_enabled && iommu->iommu.ops) { + if (intel_iommu_enabled && !iommu->drhd->ignored) { iommu_device_unregister(&iommu->iommu); iommu_device_sysfs_remove(&iommu->iommu); } --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -472,6 +472,8 @@ struct intel_iommu { struct iommu_device iommu; /* IOMMU core code handle */ int node; u32 flags; /* Software defined flags */ + + struct dmar_drhd_unit *drhd; }; /* PCI domain-device relationship */