iommu/sun50i: Convert to generic_single_device_group()

Use the new helper.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/3-v1-c869a95191f2+5e8-iommu_single_grp_jgg@nvidia.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/sun50i-iommu.c

@@ -107,7 +107,6 @@ struct sun50i_iommu {
 	struct clk *clk;
 
 	struct iommu_domain *domain;
-	struct iommu_group *group;
 	struct kmem_cache *pt_pool;
 };
 
@@ -815,13 +814,6 @@ static struct iommu_device *sun50i_iommu_probe_device(struct device *dev)
 	return &iommu->iommu;
 }
 
-static struct iommu_group *sun50i_iommu_device_group(struct device *dev)
-{
-	struct sun50i_iommu *iommu = sun50i_iommu_from_dev(dev);
-
-	return iommu_group_ref_get(iommu->group);
-}
-
 static int sun50i_iommu_of_xlate(struct device *dev,
 				 struct of_phandle_args *args)
 {
@@ -836,7 +828,7 @@ static int sun50i_iommu_of_xlate(struct device *dev,
 static const struct iommu_ops sun50i_iommu_ops = {
 	.identity_domain = &sun50i_iommu_identity_domain,
 	.pgsize_bitmap	= SZ_4K,
-	.device_group	= sun50i_iommu_device_group,
+	.device_group	= generic_single_device_group,
 	.domain_alloc_paging = sun50i_iommu_domain_alloc_paging,
 	.of_xlate	= sun50i_iommu_of_xlate,
 	.probe_device	= sun50i_iommu_probe_device,
@@ -1004,42 +996,36 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
 	if (!iommu->pt_pool)
 		return -ENOMEM;
 
-	iommu->group = iommu_group_alloc();
-	if (IS_ERR(iommu->group)) {
-		ret = PTR_ERR(iommu->group);
-		goto err_free_cache;
-	}
-
 	iommu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(iommu->base)) {
 		ret = PTR_ERR(iommu->base);
-		goto err_free_group;
+		goto err_free_cache;
 	}
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		ret = irq;
-		goto err_free_group;
+		goto err_free_cache;
 	}
 
 	iommu->clk = devm_clk_get(&pdev->dev, NULL);
 	if (IS_ERR(iommu->clk)) {
 		dev_err(&pdev->dev, "Couldn't get our clock.\n");
 		ret = PTR_ERR(iommu->clk);
-		goto err_free_group;
+		goto err_free_cache;
 	}
 
 	iommu->reset = devm_reset_control_get(&pdev->dev, NULL);
 	if (IS_ERR(iommu->reset)) {
 		dev_err(&pdev->dev, "Couldn't get our reset line.\n");
 		ret = PTR_ERR(iommu->reset);
-		goto err_free_group;
+		goto err_free_cache;
 	}
 
 	ret = iommu_device_sysfs_add(&iommu->iommu, &pdev->dev,
 				     NULL, dev_name(&pdev->dev));
 	if (ret)
-		goto err_free_group;
+		goto err_free_cache;
 
 	ret = iommu_device_register(&iommu->iommu, &sun50i_iommu_ops, &pdev->dev);
 	if (ret)
@@ -1058,9 +1044,6 @@ static int sun50i_iommu_probe(struct platform_device *pdev)
 err_remove_sysfs:
 	iommu_device_sysfs_remove(&iommu->iommu);
 
-err_free_group:
-	iommu_group_put(iommu->group);
-
 err_free_cache:
 	kmem_cache_destroy(iommu->pt_pool);