iommu/arm-smmu: Minor probe_device related improvements

index a5c7002ff75b..e1eae4ecfa02 100644
@@ -3237,8 +3237,8 @@ static struct platform_driver arm_smmu_driver;
 static
 struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode)
 {
-	struct device *dev = driver_find_device_by_fwnode(&arm_smmu_driver.driver,
-							  fwnode);
+	struct device *dev = bus_find_device_by_fwnode(&platform_bus_type, fwnode);
+
 	put_device(dev);
 	return dev ? dev_get_drvdata(dev) : NULL;
 }

index 650664e0f6e3..0949f2734e5d 100644
@@ -1411,8 +1411,8 @@ static bool arm_smmu_capable(struct device *dev, enum iommu_cap cap)
 static
 struct arm_smmu_device *arm_smmu_get_by_fwnode(struct fwnode_handle *fwnode)
 {
-	struct device *dev = driver_find_device_by_fwnode(&arm_smmu_driver.driver,
-							  fwnode);
+	struct device *dev = bus_find_device_by_fwnode(&platform_bus_type, fwnode);
+
 	put_device(dev);
 	return dev ? dev_get_drvdata(dev) : NULL;
 }

@@ -2227,21 +2227,6 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 					i, irq);
 	}
 
-	err = iommu_device_sysfs_add(&smmu->iommu, smmu->dev, NULL,
-				     "smmu.%pa", &smmu->ioaddr);
-	if (err) {
-		dev_err(dev, "Failed to register iommu in sysfs\n");
-		return err;
-	}
-
-	err = iommu_device_register(&smmu->iommu, &arm_smmu_ops,
-				    using_legacy_binding ? NULL : dev);
-	if (err) {
-		dev_err(dev, "Failed to register iommu\n");
-		iommu_device_sysfs_remove(&smmu->iommu);
-		return err;
-	}
-
 	platform_set_drvdata(pdev, smmu);
 
 	/* Check for RMRs and install bypass SMRs if any */

@@ -2250,6 +2235,18 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 	arm_smmu_device_reset(smmu);
 	arm_smmu_test_smr_masks(smmu);
 
+	err = iommu_device_sysfs_add(&smmu->iommu, smmu->dev, NULL,
+				     "smmu.%pa", &smmu->ioaddr);
+	if (err)
+		return dev_err_probe(dev, err, "Failed to register iommu in sysfs\n");
+
+	err = iommu_device_register(&smmu->iommu, &arm_smmu_ops,
+				    using_legacy_binding ? NULL : dev);
+	if (err) {
+		iommu_device_sysfs_remove(&smmu->iommu);
+		return dev_err_probe(dev, err, "Failed to register iommu\n");
+	}
+
 	/*
 	 * We want to avoid touching dev->power.lock in fastpaths unless
 	 * it's really going to do something useful - pm_runtime_enabled()

index 0949f2734e5d..79afc92e1d8b 100644
@@ -1437,17 +1437,6 @@ static struct iommu_device *arm_smmu_probe_device(struct device *dev)
 			goto out_free;
 	} else {
 		smmu = arm_smmu_get_by_fwnode(fwspec->iommu_fwnode);
-
-		/*
-		 * Defer probe if the relevant SMMU instance hasn't finished
-		 * probing yet. This is a fragile hack and we'd ideally
-		 * avoid this race in the core code. Until that's ironed
-		 * out, however, this is the most pragmatic option on the
-		 * table.
-		 */
-		if (!smmu)
-			return ERR_PTR(dev_err_probe(dev, -EPROBE_DEFER,
-						"smmu dev has not bound yet\n"));
 	}
 
 	ret = -EINVAL;

index e1eae4ecfa02..264a686d30cb 100644
@@ -4663,7 +4663,7 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 	/* Initialise in-memory data structures */
 	ret = arm_smmu_init_structures(smmu);
 	if (ret)
-		return ret;
+		goto err_free_iopf;
 
 	/* Record our private device structure */
 	platform_set_drvdata(pdev, smmu);

@@ -4674,22 +4674,29 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
 	/* Reset the device */
 	ret = arm_smmu_device_reset(smmu);
 	if (ret)
-		return ret;
+		goto err_disable;
 
 	/* And we're up. Go go go! */
 	ret = iommu_device_sysfs_add(&smmu->iommu, dev, NULL,
 				     "smmu3.%pa", &ioaddr);
 	if (ret)
-		return ret;
+		goto err_disable;
 
 	ret = iommu_device_register(&smmu->iommu, &arm_smmu_ops, dev);
 	if (ret) {
 		dev_err(dev, "Failed to register iommu\n");
-		iommu_device_sysfs_remove(&smmu->iommu);
-		return ret;
+		goto err_free_sysfs;
 	}
 
 	return 0;
+
+err_free_sysfs:
+	iommu_device_sysfs_remove(&smmu->iommu);
+err_disable:
+	arm_smmu_device_disable(smmu);
+err_free_iopf:
+	iopf_queue_free(smmu->evtq.iopf);
+	return ret;
 }
 
 static void arm_smmu_device_remove(struct platform_device *pdev)

index 9bc0c74cca3c..7cd433803bd6 100644
@@ -2819,7 +2819,7 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode)
 	struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
 
 	if (!ops)
-		return -EPROBE_DEFER;
+		return driver_deferred_probe_check_state(dev);
 
 	if (fwspec)
 		return ops == iommu_fwspec_ops(fwspec) ? 0 : -EINVAL;

index e7a6a1611d19..97987cd78da9 100644
@@ -29,8 +29,6 @@ static int of_iommu_xlate(struct device *dev,
 		return -ENODEV;
 
 	ret = iommu_fwspec_init(dev, of_fwnode_handle(iommu_spec->np));
-	if (ret == -EPROBE_DEFER)
-		return driver_deferred_probe_check_state(dev);
 	if (ret)
 		return ret;