Re: [PATCH v2] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails
From: Will Deacon
Date: Fri Jun 11 2021 - 12:16:07 EST
On Thu, 10 Jun 2021 10:54:29 +0800, Xiyu Yang wrote:
> arm_smmu_rpm_get() invokes pm_runtime_get_sync(), which increases the
> refcount of the "smmu" even though the return value is less than 0.
> The reference counting issue happens in some error handling paths of
> arm_smmu_rpm_get() in its caller functions. When arm_smmu_rpm_get()
> fails, the caller functions forget to decrease the refcount of "smmu"
> increased by arm_smmu_rpm_get(), causing a refcount leak.
Applied to will (for-joerg/arm-smmu/updates), thanks!
[1/1] iommu/arm-smmu: Fix arm_smmu_device refcount leak when arm_smmu_rpm_get fails