[PATCH] iommu/exynos: add missing put_device() call in exynos_iommu_of_xlate()

[Yu Kuai]

if of_find_device_by_node() succeed, exynos_iommu_of_xlate() doesn't have
a corresponding put_device(). Thus add put_device() to fix the exception
handling for this function implementation.

Fixes: aa759fd376fb ("iommu/exynos: Add callback for initializing devices from device tree")
Signed-off-by: Yu Kuai <yukuai3 at huawei.com>
---
 drivers/iommu/exynos-iommu.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index bad3c0ce10cb..de324b4eedfe 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1295,13 +1295,17 @@ static int exynos_iommu_of_xlate(struct device *dev,
 		return -ENODEV;
 
 	data = platform_get_drvdata(sysmmu);
-	if (!data)
+	if (!data) {
+		put_device(&sysmmu->dev);
 		return -ENODEV;
+	}
 
 	if (!owner) {
 		owner = kzalloc(sizeof(*owner), GFP_KERNEL);
-		if (!owner)
+		if (!owner) {
+			put_device(&sysmmu->dev);
 			return -ENOMEM;
+		}
 
 		INIT_LIST_HEAD(&owner->controllers);
 		mutex_init(&owner->rpm_lock);
-- 
2.25.4