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Tue, 13 Sep 2022 01:24:56 -0700 From: Nicolin Chen To: , , , , , , , , , , , , , , , , , , CC: , , , , , , , , , , , , , , , , Subject: [PATCH 2/5] iommu/amd: Drop unnecessary checks in amd_iommu_attach_device() Date: Tue, 13 Sep 2022 01:24:45 -0700 Message-ID: <20220913082448.31120-3-nicolinc@nvidia.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220913082448.31120-1-nicolinc@nvidia.com> References: <20220913082448.31120-1-nicolinc@nvidia.com> MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000B8E9:EE_|DM4PR12MB5745:EE_ X-MS-Office365-Filtering-Correlation-Id: 730928f1-b9bc-43d6-0d14-08da9561728b 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:12.22.5.238;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(13230022)(4636009)(396003)(136003)(376002)(39860400002)(346002)(451199015)(40470700004)(36840700001)(46966006)(7406005)(478600001)(2616005)(336012)(5660300002)(47076005)(426003)(81166007)(7416002)(921005)(1076003)(2906002)(316002)(7696005)(8936002)(6666004)(4326008)(41300700001)(26005)(36756003)(70586007)(83380400001)(70206006)(40460700003)(8676002)(186003)(36860700001)(110136005)(82310400005)(356005)(86362001)(40480700001)(82740400003)(54906003)(2101003)(36900700001)(83996005);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Sep 2022 08:24:59.1022 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 730928f1-b9bc-43d6-0d14-08da9561728b X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.238];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000B8E9.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB5745 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220913_012504_136175_E62B5C4C X-CRM114-Status: GOOD ( 12.78 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org The same checks are done in amd_iommu_probe_device(). If any of them fails there, then the device won't get a group, so there's no way for it to even reach amd_iommu_attach_device any more. Suggested-by: Robin Murphy Cc: Joerg Roedel Cc: Suravee Suthikulpanit Signed-off-by: Nicolin Chen --- drivers/iommu/amd/iommu.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 828672a46a3d..930d9946b9f7 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2135,21 +2135,13 @@ static void amd_iommu_detach_device(struct iommu_domain *dom, static int amd_iommu_attach_device(struct iommu_domain *dom, struct device *dev) { + struct iommu_dev_data *dev_data = dev_iommu_priv_get(dev); struct protection_domain *domain = to_pdomain(dom); - struct iommu_dev_data *dev_data; - struct amd_iommu *iommu; + struct amd_iommu *iommu = rlookup_amd_iommu(dev); int ret; - if (!check_device(dev)) - return -EINVAL; - - dev_data = dev_iommu_priv_get(dev); dev_data->defer_attach = false; - iommu = rlookup_amd_iommu(dev); - if (!iommu) - return -EINVAL; - if (dev_data->domain) detach_device(dev);