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Wed, 18 Mar 2026 13:29:40 -0700 Received: from Asurada-Nvidia (10.127.8.9) by mail.nvidia.com (10.126.190.182) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.20 via Frontend Transport; Wed, 18 Mar 2026 13:29:39 -0700 Date: Wed, 18 Mar 2026 13:29:38 -0700 From: Nicolin Chen To: Shuai Xue CC: , , , , , , , , , , , , , , , Subject: Re: [PATCH v2 3/7] iommu: Add iommu_report_device_broken() to quarantine a broken device Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: MWH0EPF000C6194:EE_|IA0PPF12042BF6F:EE_ X-MS-Office365-Filtering-Correlation-Id: c7cd655d-99d7-4cab-0851-08de852d2105 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|7416014|376014|36860700016|82310400026|56012099003|22082099003|18002099003; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: PSn6biYdu2wxWtm3knfzc/cJs3VGHCrnI+2JcNv5cqkAD4zWqpt/XSVJ8d5L+TkYeP4mHgraEGFy9YyJ958fL6/5K5RmlOeHXWEJtFGdcPV07h55HGilzAtLmEpwlnL60bsEYLm1xLm5gI5oxqKRqY/utVyVlntXlwhizkb9fGxoSao1Mia1W8OjBBI5WxAv2gBrE8hnra0Rq3jgnbfE8c5mG2hNdJHDkUBbtTEH3O6C/zB2/i1xEuLOMNnrUpCj0qD4eLCnBmnrFD21D1q6WlDazW12xksdhGqWzXPnqWPSuaBQvM2Do3FAUPWEx3ELT8QMbO7NDrKs2EQDP9+pBU6fwd4S8NCnQ4oGd0pnLxX7cHt5tkRTSFMOYeaNLlU6mJ+rY8JCd1xXutOTw0BPtnoiX2n5MRnm3904MjGraVPEpritfjm36UzPn2DKjaLU X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Mar 2026 20:30:00.6038 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: c7cd655d-99d7-4cab-0851-08de852d2105 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: MWH0EPF000C6194.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PPF12042BF6F X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260318_133022_792460_B82E633F X-CRM114-Status: GOOD ( 12.75 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Mar 18, 2026 at 07:45:19PM +0800, Shuai Xue wrote: > On 3/18/26 3:15 AM, Nicolin Chen wrote: > > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > > index 9ba12b2164724..9b5f94e566ff9 100644 > > --- a/include/linux/iommu.h > > +++ b/include/linux/iommu.h > > @@ -891,6 +891,8 @@ static inline struct iommu_device *__iommu_get_iommu_dev(struct device *dev) > > #define iommu_get_iommu_dev(dev, type, member) \ > > container_of(__iommu_get_iommu_dev(dev), type, member) > > +void iommu_report_device_broken(struct device *dev); > > + > > This declaration is inside the #ifdef CONFIG_IOMMU_API section, but > there's no corresponding stub in the #else block. While current > callers (arm-smmu-v3) always have CONFIG_IOMMU_API, for API > completeness, please add a stub. Yes. That's a miss. Thanks Nicolin