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Received: from LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) by CH3PR12MB9282.namprd12.prod.outlook.com (2603:10b6:610:1cb::8) 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 16:45:11 +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 16:45:11 +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 03/17] of: Use -ENODEV consistently in of_iommu_configure() Date: Fri, 3 Nov 2023 13:44:48 -0300 Message-ID: <3-v1-5f734af130a3+34f-iommu_fwspec_jgg@nvidia.com> In-Reply-To: <0-v1-5f734af130a3+34f-iommu_fwspec_jgg@nvidia.com> References: X-ClientProxiedBy: BL1PR13CA0182.namprd13.prod.outlook.com (2603:10b6:208:2be::7) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|CH3PR12MB9282:EE_ X-MS-Office365-Filtering-Correlation-Id: bc9eba72-d890-4244-da24-08dbdc8c3bc0 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)(396003)(346002)(366004)(39860400002)(136003)(376002)(230922051799003)(186009)(64100799003)(1800799009)(451199024)(38100700002)(2616005)(36756003)(26005)(921008)(8676002)(4326008)(316002)(86362001)(6486002)(478600001)(41300700001)(66556008)(66476007)(66946007)(110136005)(6512007)(6506007)(8936002)(5660300002)(6666004)(7406005)(2906002)(7416002)(83380400001)(4216001);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: XKZSSwajEKH+IWShhl71mjIvz5r5QO5EBJDeJi2fKVEAG49Fkw/CH6qg1PaT6GyCWcKcEhSS2FM3RymDnG+JlPH1w6jZrEmojKs0sxVd0SLboyRgyYokAwiJguU7SbeM6n011r4R8o/wzKNpRirYocXBzaqEGRwEjSG0fGJLYsJPtPO3N27cygEhBtBf/Sx/gLoDDB1Z1V6Up2B+TDpV8i+p1IvCB2KZIHn9/ZK/i7SSkSZ5bhBibUTEJrLh/0Ow4GEReVj9EFDghDvb4JAfhQ+mvSqJVR10izACiXhz+X+szUoOWE3C7ohdiRlQYhl13VXss2VVB8CB0QlSmvDK+AzfNmka53CRRnJi0dWHMMljI+3mYdnOkdmp401V8yWhYX7MAJOijDCS/kBrrDDh/yDgY6IscSBy0e7ko5Dgd7/HfSwnqC4WWbxUpvvv7AhTESpcssKGxdwulTmvaSYYzODSAjrT3B64ANx8+rPji1llkDO6k6rnY3qpNxPJl8utb+S1xwO8bGwto9autER4KEyr7URDNFjZqzmEmiysmIOW4hqcbtki5nZGnO614X6ErLTt5YY17oS7j0BG4l3ghVvrIfZcdqhKqkloQ1Az2oJLcxExKKqKwqqLiiHgDqyi/sb3QDkonYyXT1aLRmz8Ixjvsla7Gj4s1W279yLTdzPYZ8aJh6izVZUn5AZRRbJ1FXpuZBXC34fZGGopFqnR53WVqzuRuNknQ/pui3s6aQwSruqUYUI3/otC1YAAUiHnqTSUAljt0gFD8H/gYUjjZFgjc/C8brZ1ZeP5p4vS+Kq9ZVNpanIlCNCnpGTSMTwVRxI9AwD6YqtXm9sFCWnXL8uEFY+TUikS5erGW6Nw/Rlg0hwXMP3I/0Ailai6dTaiHZTAljd0hEb7YfNm/P9wtzGWkSaEiVxJ5oObr4RiWyQ6fGvsrfH26fLnXomx33mOJTVWzf4Yu7q5E4O62SaqM7UdyY2y18fFNfNEQX1psWp4uF9CeA/1UICq6Fxnugm9C3XM0gyXlD0UHBxel01VWcdKoEOdwxToKKwWgiE2e11gOJYLW5+mIPMe2fspibMSq9P1HXxXsQyzTozxkppOVwibZwxIcyGcKT99dYsgNG2xfgpsflYvNO+GLTLzDVPBogQZCqtYfS9hJkZYZro8KZTUjXbqakdZyam9u/uYjDclkS1lYYw2LPTAR325x8A65hScoPcLZ6YsEwcOAUmfr11Le1GkEhRxhYxSEAOaLcmrbYYLsqNIVZ/PSHFfNeGULtmoIRGUzgSzUFPKa8LXBxKChytSKA0ucAPdSS9+q88CORwrtoLzA6X2bse8FnypB/L3tSE1/5DctpwHd6kwV+MWYuN0wQS4HaMYjmHEU1oGUOiheHXOmXjIxHm9lIzM84wilMWL4SxkvzZ3/V3FsRKUChMTrdKU5CarofSIUvyZYpGnJE65N7Eqw4V4HV/xC8iUnRJNQmFXqCOUsqVwLE8fRbqyvc27OGNJCoaC5uaaumMHKtJXfHT3Yqml8J64PWztHL16qPtzVbFXdDheiLpygMkDCYOLn2xnIuUS5t6kOHbTlpMsCXEePnpVXuXX X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: bc9eba72-d890-4244-da24-08dbdc8c3bc0 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Nov 2023 16:45:06.1205 (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: d2FfL3N3BqymAYjHr+UAS4KUeMm1aMHFjx04VGo3x8hkAzO3iIC4QOQ51TqKrv8q X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9282 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231103_094536_037755_09679FED X-CRM114-Status: GOOD ( 18.79 ) X-Spam-Score: 0.6 (/) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Instead of returning 1 and trying to handle positive error codes just stick to the convention of returning -ENODEV. Remove references to ops from of_iommu_configure(), a NULL ops will already generate [...] Content analysis details: (0.6 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_NONE SPF: sender does not publish an SPF Record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 1.0 FORGED_SPF_HELO No description available. -0.2 DKIMWL_WL_HIGH DKIMwl.org - High trust sender X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Instead of returning 1 and trying to handle positive error codes just stick to the convention of returning -ENODEV. Remove references to ops from of_iommu_configure(), a NULL ops will already generate an error code. There is no reason to check dev->bus, if err=0 at this point then the called configure functions thought there was an iommu and we should try to probe it. Remove it. Signed-off-by: Jason Gunthorpe --- drivers/iommu/of_iommu.c | 42 +++++++++++++--------------------------- 1 file changed, 13 insertions(+), 29 deletions(-) diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index e2fa29c16dd758..4f77495a2543ea 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -17,7 +17,7 @@ #include #include -#define NO_IOMMU 1 +#define NO_IOMMU -ENODEV static int of_iommu_xlate(struct device *dev, struct of_phandle_args *iommu_spec) @@ -117,9 +117,8 @@ static int of_iommu_configure_device(struct device_node *master_np, int of_iommu_configure(struct device *dev, struct device_node *master_np, const u32 *id) { - const struct iommu_ops *ops = NULL; struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); - int err = NO_IOMMU; + int err; if (!master_np) return -ENODEV; @@ -150,34 +149,19 @@ int of_iommu_configure(struct device *dev, struct device_node *master_np, err = of_iommu_configure_device(master_np, dev, id); } - /* - * Two success conditions can be represented by non-negative err here: - * >0 : there is no IOMMU, or one was unavailable for non-fatal reasons - * 0 : we found an IOMMU, and dev->fwspec is initialised appropriately - * <0 : any actual error - */ - if (!err) { - /* The fwspec pointer changed, read it again */ - fwspec = dev_iommu_fwspec_get(dev); - ops = fwspec->ops; - } - /* - * If we have reason to believe the IOMMU driver missed the initial - * probe for dev, replay it to get things in order. - */ - if (!err && dev->bus) - err = iommu_probe_device(dev); + if (err == -ENODEV || err == -EPROBE_DEFER) + return err; + if (err) + goto err_log; - /* Ignore all other errors apart from EPROBE_DEFER */ - if (err < 0) { - if (err == -EPROBE_DEFER) - return err; - dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); - return -ENODEV; - } - if (!ops) - return -ENODEV; + err = iommu_probe_device(dev); + if (err) + goto err_log; return 0; + +err_log: + dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); + return err; } static enum iommu_resv_type __maybe_unused