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

[ Upstream commit 1a26044954a6d1f4d375d5e62392446af663be7a ]

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@huawei.com>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20200918011335.909141-1-yukuai3@huawei.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index 29a31eb9ace3ed2c1369fcd6f1284a440474ca32..02df8d9dc842abccfb7d7bb10a54c0eee2743ca5 100644 (file)
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1158,13 +1158,17 @@ 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);
                dev->archdata.iommu = owner;