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Wysocki" , Rob Herring , Thierry Reding Subject: [PATCH 07/10] acpi: Do not return struct iommu_ops from acpi_iommu_configure_id() Date: Tue, 28 Nov 2023 20:48:03 -0400 Message-ID: <7-v1-720585788a7d+811b-iommu_fwspec_p1_jgg@nvidia.com> In-Reply-To: <0-v1-720585788a7d+811b-iommu_fwspec_p1_jgg@nvidia.com> References: X-ClientProxiedBy: SA9P223CA0005.NAMP223.PROD.OUTLOOK.COM (2603:10b6:806:26::10) To LV2PR12MB5869.namprd12.prod.outlook.com (2603:10b6:408:176::16) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: LV2PR12MB5869:EE_|SA0PR12MB4575:EE_ X-MS-Office365-Filtering-Correlation-Id: ef3cdcb0-8c41-4123-7cd2-08dbf074da78 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)(396003)(376002)(39860400002)(136003)(366004)(230922051799003)(64100799003)(186009)(1800799012)(451199024)(26005)(2616005)(8676002)(6506007)(6512007)(7366002)(8936002)(7406005)(110136005)(7416002)(4326008)(86362001)(5660300002)(478600001)(6486002)(316002)(66476007)(66946007)(54906003)(66556008)(38100700002)(83380400001)(2906002)(6666004)(921008)(41300700001)(36756003)(4216001);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: ef3cdcb0-8c41-4123-7cd2-08dbf074da78 X-MS-Exchange-CrossTenant-AuthSource: LV2PR12MB5869.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Nov 2023 00:48:07.6484 (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: ycF7p2nhNFwOx38q7XDzAfgW83E9drWUTsKuRY2KhN4tnEtUWbtf3z4zCttReeHz X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA0PR12MB4575 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231128_164818_902490_EC389633 X-CRM114-Status: GOOD ( 15.48 ) 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: Nothing needs this pointer. Return a normal error code with the usual IOMMU semantic that ENODEV means 'there is no IOMMU driver'. Acked-by: Rafael J. Wysocki Reviewed-by: Jerry Snitselaar Tested-by: Hector Martin Signed-off-by: Jason Gunthorpe [...] 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 Nothing needs this pointer. Return a normal error code with the usual IOMMU semantic that ENODEV means 'there is no IOMMU driver'. Acked-by: Rafael J. Wysocki Reviewed-by: Jerry Snitselaar Tested-by: Hector Martin Signed-off-by: Jason Gunthorpe Reviewed-by: Lu Baolu Reviewed-by: Moritz Fischer --- drivers/acpi/scan.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 444a0b3c72f2d8..340ba720c72129 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1562,8 +1562,7 @@ static inline const struct iommu_ops *acpi_iommu_fwspec_ops(struct device *dev) return fwspec ? fwspec->ops : NULL; } -static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, - const u32 *id_in) +static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { int err; const struct iommu_ops *ops; @@ -1577,7 +1576,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, ops = acpi_iommu_fwspec_ops(dev); if (ops) { mutex_unlock(&iommu_probe_device_lock); - return ops; + return 0; } err = iort_iommu_configure_id(dev, id_in); @@ -1594,12 +1593,14 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, /* Ignore all other errors apart from EPROBE_DEFER */ if (err == -EPROBE_DEFER) { - return ERR_PTR(err); + return err; } else if (err) { dev_dbg(dev, "Adding to IOMMU failed: %d\n", err); - return NULL; + return -ENODEV; } - return acpi_iommu_fwspec_ops(dev); + if (!acpi_iommu_fwspec_ops(dev)) + return -ENODEV; + return 0; } #else /* !CONFIG_IOMMU_API */ @@ -1611,10 +1612,9 @@ int acpi_iommu_fwspec_init(struct device *dev, u32 id, return -ENODEV; } -static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, - const u32 *id_in) +static int acpi_iommu_configure_id(struct device *dev, const u32 *id_in) { - return NULL; + return -ENODEV; } #endif /* !CONFIG_IOMMU_API */ @@ -1628,7 +1628,7 @@ static const struct iommu_ops *acpi_iommu_configure_id(struct device *dev, int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, const u32 *input_id) { - const struct iommu_ops *iommu; + int ret; if (attr == DEV_DMA_NOT_SUPPORTED) { set_dma_ops(dev, &dma_dummy_ops); @@ -1637,10 +1637,15 @@ int acpi_dma_configure_id(struct device *dev, enum dev_dma_attr attr, acpi_arch_dma_setup(dev); - iommu = acpi_iommu_configure_id(dev, input_id); - if (PTR_ERR(iommu) == -EPROBE_DEFER) + ret = acpi_iommu_configure_id(dev, input_id); + if (ret == -EPROBE_DEFER) return -EPROBE_DEFER; + /* + * Historically this routine doesn't fail driver probing due to errors + * in acpi_iommu_configure_id() + */ + arch_setup_dma_ops(dev, 0, U64_MAX, attr == DEV_DMA_COHERENT); return 0;