iommu/msm: Convert to probe/release_device() call-backs

Convert the MSM IOMMU driver to use the probe_device() and
release_device() call-backs of iommu_ops, so that the iommu core code
does the group and sysfs setup.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200429133712.31431-22-joro@8bytes.org
Signed-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/msm_iommu.c

@@ -388,43 +388,23 @@ static struct msm_iommu_dev *find_iommu_for_dev(struct device *dev)
 	return ret;
 }
 
-static int msm_iommu_add_device(struct device *dev)
+static struct iommu_device *msm_iommu_probe_device(struct device *dev)
 {
 	struct msm_iommu_dev *iommu;
-	struct iommu_group *group;
 	unsigned long flags;
 
 	spin_lock_irqsave(&msm_iommu_lock, flags);
 	iommu = find_iommu_for_dev(dev);
 	spin_unlock_irqrestore(&msm_iommu_lock, flags);
 
-	if (iommu)
-		iommu_device_link(&iommu->iommu, dev);
-	else
-		return -ENODEV;
-
-	group = iommu_group_get_for_dev(dev);
-	if (IS_ERR(group))
-		return PTR_ERR(group);
-
-	iommu_group_put(group);
+	if (!iommu)
+		return ERR_PTR(-ENODEV);
 
-	return 0;
+	return &iommu->iommu;
 }
 
-static void msm_iommu_remove_device(struct device *dev)
+static void msm_iommu_release_device(struct device *dev)
 {
-	struct msm_iommu_dev *iommu;
-	unsigned long flags;
-
-	spin_lock_irqsave(&msm_iommu_lock, flags);
-	iommu = find_iommu_for_dev(dev);
-	spin_unlock_irqrestore(&msm_iommu_lock, flags);
-
-	if (iommu)
-		iommu_device_unlink(&iommu->iommu, dev);
-
-	iommu_group_remove_device(dev);
 }
 
 static int msm_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
@@ -708,8 +688,8 @@ static struct iommu_ops msm_iommu_ops = {
 	 */
 	.iotlb_sync = NULL,
 	.iova_to_phys = msm_iommu_iova_to_phys,
-	.add_device = msm_iommu_add_device,
-	.remove_device = msm_iommu_remove_device,
+	.probe_device = msm_iommu_probe_device,
+	.release_device = msm_iommu_release_device,
 	.device_group = generic_device_group,
 	.pgsize_bitmap = MSM_IOMMU_PGSIZES,
 	.of_xlate = qcom_iommu_of_xlate,