From: Liang He windhl@126.com
stable inclusion from stable-v5.10.137 commit 2ada6b4a800768a1f28594fb030927259f0c1d4e category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ 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 Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Wei Li liwei391@huawei.com --- drivers/iommu/arm/arm-smmu/qcom_iommu.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/arm/arm-smmu/qcom_iommu.c b/drivers/iommu/arm/arm-smmu/qcom_iommu.c index 7f280c8d5c53..38641110be00 100644 --- a/drivers/iommu/arm/arm-smmu/qcom_iommu.c +++ b/drivers/iommu/arm/arm-smmu/qcom_iommu.c @@ -758,9 +758,12 @@ 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; }