[PATCH] iommu/qcom: Cleanup resources in case of probe error path

[Amey Narkhede]

If device registration fails, remove sysfs attribute
and if setting bus callbacks fails, unregister the device
and cleanup the sysfs attribute.

Signed-off-by: Amey Narkhede <ameynarkhede03 at gmail.com>
---
 drivers/iommu/arm/arm-smmu/qcom_iommu.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
index 4294abe389b2..5fa128a1f7f0 100644
--- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c
+++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c
@@ -850,10 +850,12 @@ static int qcom_iommu_device_probe(struct platform_device *pdev)
 	ret = iommu_device_register(&qcom_iommu->iommu, &qcom_iommu_ops, dev);
 	if (ret) {
 		dev_err(dev, "Failed to register iommu\n");
-		return ret;
+		goto err_sysfs_remove;
 	}

-	bus_set_iommu(&platform_bus_type, &qcom_iommu_ops);
+	ret = bus_set_iommu(&platform_bus_type, &qcom_iommu_ops);
+	if (ret)
+		goto err_unregister_device;

 	if (qcom_iommu->local_base) {
 		pm_runtime_get_sync(dev);
@@ -862,6 +864,14 @@ static int qcom_iommu_device_probe(struct platform_device *pdev)
 	}

 	return 0;
+
+err_unregister_device:
+	iommu_device_unregister(&qcom_iommu->iommu);
+
+err_sysfs_remove:
+	iommu_device_sysfs_remove(&qcom_iommu->iommu);
+
+	return ret;
 }

 static int qcom_iommu_device_remove(struct platform_device *pdev)
--
2.31.1

I assume its ok to leave pm_runtime_enable in case of error.