From patchwork Fri Nov 3 16:45:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Gunthorpe X-Patchwork-Id: 740762 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B6E4018048; Fri, 3 Nov 2023 16:45:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="g/ZvgNTN" Received: from NAM04-BN8-obe.outbound.protection.outlook.com (mail-bn8nam04on2073.outbound.protection.outlook.com [40.107.100.73]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 02510191; Fri, 3 Nov 2023 09:45:09 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=P9ULb+ku7ImqzOFp2PzIGljiz33SlmRicB8x6K/tUqe3CJeyswG5e3D5gMnpk18bQCfdI5xh3M4F7zzK1rzRpasgTrWp5YqBiWiyV1Tw7WA/CCxjQKZOggV6r9S4N2iJphXtK6yqAbHoAGefMybX36yTca0lghaliBHOnZvlRPZQvpPEDy0SqRMpObaGiQjq1+sCAkGwPz1diqHIFqr/uPUspBgvtgccgQOQSl6tFRHHmBUoQ18lWgXrjuXCUwmU1fmkrD6DS5QvYoZfpRtg5eulEmMk8+67OIf5wtx4s79XpfoJDaJh+yN8xoXTmBdKIIfvQDG//DztxcH73Q/MCQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=AFCQA2aCUVPOXSacJ+ppYoNm3z3qGXA89zxgX94rYZg=; b=a7wL7voG82WYcPi8gCMliwxp4iHcmF5hBhhDyR1oLa6zWJo4y+Spag1LjytHg52f0AZsJpamQJuo43gDvnHqHOYKBXM9TXQHyn8E5imw4c6tgg5NBlVaipHPLsoEdC5BmHIJ8SiAoPO+6DXbPLUQKwxuAEcz3setCdKbIZOV/Tn2fiJN0qFHcxMhuil6TLT8Ch65nekcRdcilekScssSVRiuWRG0F6Pgmsis4r9FtY+YVhFHcXA74plG/k91BLMRNY13QZstP2JA54VJvart+VTGmAV9XlcnmkXCAcggpQ29Qe85U/fuJPFv9kPZFU4+J0i5yDArOB+ckmLq5wX8/Q== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=AFCQA2aCUVPOXSacJ+ppYoNm3z3qGXA89zxgX94rYZg=; b=g/ZvgNTNtn7x/dAwhVs0ZtUh0PUKcIP1joqfhvkZCQ603ZOyFUczsQmgbY4cBVMmk6QjPj5Kz/DcpeoBZ5On3sMP1F27C6sg7Im1IMsw7X5PLvSlmxhTsvxZtc5AW4pBQBbI9m5RUx5seyeaAdd31GqZJrmKNhUKPIBCLL6gsTesU3sbW+2G/xn7gmWWBaRe6Uap2jgG4mgrtBEfUbnI1W7VhrVksXEmtR7C5spvbCSTDbnXusE6buGqWpOONM7z3S8aASiyEvTJdooDZ5XGuD7QmwkaOISTCoH1kLt2+qfrO11fLSsJpxzA95kVYmDmcDw729XrSZE0KdXHYAArPw== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by CH3PR12MB9394.namprd12.prod.outlook.com (2603:10b6:610:1cf::11) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6954.21; Fri, 3 Nov 2023 16:45:06 +0000 Received: from LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::b53a:1092:9be2:cfb9]) by LV2PR12MB5869.namprd12.prod.outlook.com ([fe80::b53a:1092:9be2:cfb9%4]) with mapi id 15.20.6933.027; Fri, 3 Nov 2023 16:45:06 +0000 From: Jason Gunthorpe To: acpica-devel@lists.linuxfoundation.org, Alyssa Rosenzweig , Albert Ou , asahi@lists.linux.dev, Lu Baolu , Catalin Marinas , Dexuan Cui , devicetree@vger.kernel.org, David Woodhouse , Frank Rowand , Hanjun Guo , Haiyang Zhang , Christoph Hellwig , iommu@lists.linux.dev, Jean-Philippe Brucker , Jonathan Hunter , Joerg Roedel , "K. Y. Srinivasan" , Len Brown , linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org, linux-snps-arc@lists.infradead.org, linux-tegra@vger.kernel.org, Russell King , Lorenzo Pieralisi , Marek Szyprowski , Hector Martin , Palmer Dabbelt , Paul Walmsley , "Rafael J. Wysocki" , Robert Moore , Rob Herring , Robin Murphy , Sudeep Holla , Suravee Suthikulpanit , Sven Peter , Thierry Reding , Thomas Bogendoerfer , Krishna Reddy , Vineet Gupta , virtualization@lists.linux-foundation.org, Wei Liu , Will Deacon Cc: Zhenhua Huang Subject: [PATCH RFC 16/17] iommu: Mark dev_iommu_get() with lockdep Date: Fri, 3 Nov 2023 13:45:01 -0300 Message-ID: <16-v1-5f734af130a3+34f-iommu_fwspec_jgg@nvidia.com> In-Reply-To: <0-v1-5f734af130a3+34f-iommu_fwspec_jgg@nvidia.com> References: X-ClientProxiedBy: BL1PR13CA0190.namprd13.prod.outlook.com (2603:10b6:208:2be::15) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) Precedence: bulk X-Mailing-List: linux-acpi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|CH3PR12MB9394:EE_ X-MS-Office365-Filtering-Correlation-Id: aa015ef1-b4fb-47fb-3348-08dbdc8c3ad7 X-LD-Processed: 43083d15-7273-40c1-b7db-39efd9ccc17a,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:LV2PR12MB5869.namprd12.prod.outlook.com; PTR:; CAT:NONE; SFS:(13230031)(346002)(136003)(366004)(39860400002)(396003)(376002)(230922051799003)(64100799003)(186009)(1800799009)(451199024)(6506007)(38100700002)(2616005)(36756003)(86362001)(26005)(41300700001)(7406005)(2906002)(4744005)(7416002)(83380400001)(8676002)(8936002)(4326008)(66556008)(66476007)(316002)(5660300002)(110136005)(478600001)(66946007)(6486002)(921008)(6512007)(6666004); DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: aa015ef1-b4fb-47fb-3348-08dbdc8c3ad7 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Nov 2023 16:45:04.5408 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7i3aojKgXsgtfjYNndrYLQ9wQIQMDAej/Rui7rGMG+di5SfulWwCylKniyQ0tAsA X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9394 Allocation of dev->iommu must be done under the iommu_probe_device_lock. Mark this with lockdep to discourage future mistakes. Signed-off-by: Jason Gunthorpe Reviewed-by: Jerry Snitselaar --- drivers/iommu/iommu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 9f23e113f46bc7..1cf9f62c047c7d 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -345,6 +345,8 @@ static struct dev_iommu *dev_iommu_get(struct device *dev) { struct dev_iommu *param = dev->iommu; + lockdep_assert_held(&iommu_probe_device_lock); + if (param) return param;