1 files changed, 32 insertions, 6 deletions

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu.c b/drivers/iommu/arm/arm-smmu/arm-smmu.c
index 6f72c4d208ca..d3c6f54110a5 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu.c
@@ -74,7 +74,7 @@ static bool using_legacy_binding, using_generic_binding;
 static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
 {
 	if (pm_runtime_enabled(smmu->dev))
-		return pm_runtime_get_sync(smmu->dev);
+		return pm_runtime_resume_and_get(smmu->dev);
 
 	return 0;
 }
@@ -1271,6 +1271,7 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
 	u64 phys;
 	unsigned long va, flags;
 	int ret, idx = cfg->cbndx;
+	phys_addr_t addr = 0;
 
 	ret = arm_smmu_rpm_get(smmu);
 	if (ret < 0)
@@ -1290,6 +1291,7 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
 		dev_err(dev,
 			"iova to phys timed out on %pad. Falling back to software table walk.\n",
 			&iova);
+		arm_smmu_rpm_put(smmu);
 		return ops->iova_to_phys(ops, iova);
 	}
 
@@ -1298,12 +1300,14 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
 	if (phys & ARM_SMMU_CB_PAR_F) {
 		dev_err(dev, "translation fault!\n");
 		dev_err(dev, "PAR = 0x%llx\n", phys);
-		return 0;
+		goto out;
 	}
 
+	addr = (phys & GENMASK_ULL(39, 12)) | (iova & 0xfff);
+out:
 	arm_smmu_rpm_put(smmu);
 
-	return (phys & GENMASK_ULL(39, 12)) | (iova & 0xfff);
+	return addr;
 }
 
 static phys_addr_t arm_smmu_iova_to_phys(struct iommu_domain *domain,
@@ -1450,6 +1454,18 @@ static void arm_smmu_release_device(struct device *dev)
 	iommu_fwspec_free(dev);
 }
 
+static void arm_smmu_probe_finalize(struct device *dev)
+{
+	struct arm_smmu_master_cfg *cfg;
+	struct arm_smmu_device *smmu;
+
+	cfg = dev_iommu_priv_get(dev);
+	smmu = cfg->smmu;
+
+	if (smmu->impl && smmu->impl->probe_finalize)
+		smmu->impl->probe_finalize(smmu, dev);
+}
+
 static struct iommu_group *arm_smmu_device_group(struct device *dev)
 {
 	struct arm_smmu_master_cfg *cfg = dev_iommu_priv_get(dev);
@@ -1569,6 +1585,7 @@ static struct iommu_ops arm_smmu_ops = {
 	.iova_to_phys		= arm_smmu_iova_to_phys,
 	.probe_device		= arm_smmu_probe_device,
 	.release_device		= arm_smmu_release_device,
+	.probe_finalize		= arm_smmu_probe_finalize,
 	.device_group		= arm_smmu_device_group,
 	.enable_nesting		= arm_smmu_enable_nesting,
 	.set_pgtable_quirks	= arm_smmu_set_pgtable_quirks,
@@ -2164,7 +2181,7 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 	err = iommu_device_register(&smmu->iommu, &arm_smmu_ops, dev);
 	if (err) {
 		dev_err(dev, "Failed to register iommu\n");
-		return err;
+		goto err_sysfs_remove;
 	}
 
 	platform_set_drvdata(pdev, smmu);
@@ -2187,10 +2204,19 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 	 * any device which might need it, so we want the bus ops in place
 	 * ready to handle default domain setup as soon as any SMMU exists.
 	 */
-	if (!using_legacy_binding)
-		return arm_smmu_bus_init(&arm_smmu_ops);
+	if (!using_legacy_binding) {
+		err = arm_smmu_bus_init(&arm_smmu_ops);
+		if (err)
+			goto err_unregister_device;
+	}
 
 	return 0;
+
+err_unregister_device:
+	iommu_device_unregister(&smmu->iommu);
+err_sysfs_remove:
+	iommu_device_sysfs_remove(&smmu->iommu);
+	return err;
 }
 
 static int arm_smmu_device_remove(struct platform_device *pdev)