[PATCH 4.14 132/229] iommu/arm-smmu: qcom_iommu: Add of_node_put() when breaking out of loop

Greg Kroah-Hartman
2022-08-23T09:59:32Z

From: Liang He <windhl@126.com>

[ Upstream commit a91eb6803c1c715738682fece095145cbd68fe0b ]

In qcom_iommu_has_secure_context(), we should call of_node_put()
for the reference 'child' when breaking out of for_each_child_of_node()
which will automatically increase and decrease the refcount.

Fixes: d051f28c8807 ("iommu/qcom: Initialize secure page table")
Signed-off-by: Liang He <windhl@126.com>
Link: https://lore.kernel.org/r/20220719124955.1242171-1-windhl@126.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/qcom_iommu.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index 920a5df319bc..ad74f64d8876 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -745,9 +745,12 @@ static bool qcom_iommu_has_secure_context(struct qcom_iommu_dev *qcom_iommu)
{
struct device_node *child;

- for_each_child_of_node(qcom_iommu->dev->of_node, child)
- if (of_device_is_compatible(child, "qcom,msm-iommu-v1-sec"))
+ for_each_child_of_node(qcom_iommu->dev->of_node, child) {
+ if (of_device_is_compatible(child, "qcom,msm-iommu-v1-sec")) {
+ of_node_put(child);
return true;
+ }
+ }

return false;
}
--
2.35.1