From patchwork Tue Dec 31 20:24:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jon Derrick X-Patchwork-Id: 1216929 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (no SPF record) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=intel.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 47nZn40r7Mz9sRm for ; Wed, 1 Jan 2020 13:27:04 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727156AbgAAC1C (ORCPT ); Tue, 31 Dec 2019 21:27:02 -0500 Received: from mga14.intel.com ([192.55.52.115]:65216 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726960AbgAAC1C (ORCPT ); Tue, 31 Dec 2019 21:27:02 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 31 Dec 2019 18:27:02 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,381,1571727600"; d="scan'208";a="221068067" Received: from unknown (HELO nsgsw-rhel7p6.lm.intel.com) ([10.232.116.83]) by orsmga006.jf.intel.com with ESMTP; 31 Dec 2019 18:27:01 -0800 From: Jon Derrick To: , Cc: Bjorn Helgaas , Lorenzo Pieralisi , Keith Busch , Joerg Roedel , Christoph Hellwig , David Woodhouse , Lu Baolu , Jon Derrick Subject: [RFC 2/5] iommu/vt-d: Unlink device if failed to add to group Date: Tue, 31 Dec 2019 13:24:20 -0700 Message-Id: <1577823863-3303-3-git-send-email-jonathan.derrick@intel.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1577823863-3303-1-git-send-email-jonathan.derrick@intel.com> References: <1577823863-3303-1-git-send-email-jonathan.derrick@intel.com> Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org If the device fails to be added to the group, make sure to unlink the reference before returning. Signed-off-by: Jon Derrick Acked-by: Lu Baolu --- drivers/iommu/intel-iommu.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index b2526a4..978d502 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5625,8 +5625,10 @@ static int intel_iommu_add_device(struct device *dev) group = iommu_group_get_for_dev(dev); - if (IS_ERR(group)) - return PTR_ERR(group); + if (IS_ERR(group)) { + ret = PTR_ERR(group); + goto unlink; + } iommu_group_put(group); @@ -5652,7 +5654,8 @@ static int intel_iommu_add_device(struct device *dev) if (!get_private_domain_for_dev(dev)) { dev_warn(dev, "Failed to get a private domain.\n"); - return -ENOMEM; + ret = -ENOMEM; + goto unlink; } dev_info(dev, @@ -5667,6 +5670,10 @@ static int intel_iommu_add_device(struct device *dev) } return 0; + +unlink: + iommu_device_unlink(&iommu->iommu, dev); + return ret; } static void intel_iommu_remove_device(struct device *dev)