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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Sep 2022 05:13:13.1806 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 04fef873-959b-4483-6a3b-08da960fd2f0 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT101.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR12MB5331 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Ensure attach_dev() callback functions only return errno values expected from the attach_dev() op. In particular, only return -EINVAL when we are sure that the device is incompatible with the domain. Also drop any dev_err next to -EINVAL, following the attach_dev op kdocs. Signed-off-by: Nicolin Chen --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 13 ++----------- drivers/iommu/arm/arm-smmu/arm-smmu.c | 7 ++----- drivers/iommu/arm/arm-smmu/qcom_iommu.c | 9 ++------- 3 files changed, 6 insertions(+), 23 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index d32b02336411..8b5a2e8de7e2 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -2402,7 +2402,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) struct arm_smmu_master *master; if (!fwspec) - return -ENOENT; + return -ENODEV; master = dev_iommu_priv_get(dev); smmu = master->smmu; @@ -2429,23 +2429,14 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) goto out_unlock; } } else if (smmu_domain->smmu != smmu) { - dev_err(dev, - "cannot attach to SMMU %s (upstream of %s)\n", - dev_name(smmu_domain->smmu->dev), - dev_name(smmu->dev)); - ret = -ENXIO; + ret = -EINVAL; goto out_unlock; } else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1 && master->ssid_bits != smmu_domain->s1_cfg.s1cdmax) { - dev_err(dev, - "cannot attach to incompatible domain (%u SSID bits != %u)\n", - smmu_domain->s1_cfg.s1cdmax, master->ssid_bits); ret = -EINVAL; goto out_unlock; } else if (smmu_domain->stage == ARM_SMMU_DOMAIN_S1 && smmu_domain->stall_enabled != master->stall_enabled) { - dev_err(dev, "cannot attach to stall-%s domain\n", - smmu_domain->stall_enabled ? "enabled" : "disabled"); ret = -EINVAL; goto out_unlock; } diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c index dfa82df00342..63a488f2f16c 100644 --- a/drivers/iommu/arm/arm-smmu/arm-smmu.c +++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c @@ -1137,7 +1137,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) if (!fwspec || fwspec->ops != &arm_smmu_ops) { dev_err(dev, "cannot attach to SMMU, is it on the same bus?\n"); - return -ENXIO; + return -ENODEV; } /* @@ -1155,7 +1155,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) ret = arm_smmu_rpm_get(smmu); if (ret < 0) - return ret; + return -ENODEV; /* Ensure that the domain is finalised */ ret = arm_smmu_init_domain_context(domain, smmu, dev); @@ -1167,9 +1167,6 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev) * different SMMUs. */ if (smmu_domain->smmu != smmu) { - dev_err(dev, - "cannot attach to SMMU %s whilst already attached to domain on SMMU %s\n", - dev_name(smmu_domain->smmu->dev), dev_name(smmu->dev)); ret = -EINVAL; goto rpm_put; } diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c index 17235116d3bb..542fa8c4b6cb 100644 --- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c +++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c @@ -367,7 +367,7 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev if (!qcom_iommu) { dev_err(dev, "cannot attach to IOMMU, is it on the same bus?\n"); - return -ENXIO; + return -ENODEV; } /* Ensure that the domain is finalized */ @@ -381,13 +381,8 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev * Sanity check the domain. We don't support domains across * different IOMMUs. */ - if (qcom_domain->iommu != qcom_iommu) { - dev_err(dev, "cannot attach to IOMMU %s while already " - "attached to domain on IOMMU %s\n", - dev_name(qcom_domain->iommu->dev), - dev_name(qcom_iommu->dev)); + if (qcom_domain->iommu != qcom_iommu) return -EINVAL; - } return 0; }