[PATCH V4 3/6] iommu/arm-smmu: Invoke pm_runtime during probe, add/remove device
From: Stephen Boyd <hidden>
Date: 2017-07-12 22:55:09
Also in:
linux-arm-msm, linux-clk, linux-devicetree, linux-iommu, lkml
On 07/06, Vivek Gautam wrote:
quoted hunk ↗ jump to hunk
@@ -1231,12 +1237,18 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova, size_t size) { - struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops; + struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain); + struct io_pgtable_ops *ops = smmu_domain->pgtbl_ops; + size_t ret; if (!ops) return 0; - return ops->unmap(ops, iova, size); + pm_runtime_get_sync(smmu_domain->smmu->dev);
Can these map/unmap ops be called from an atomic context? I seem to recall that being a problem before.
+ ret = ops->unmap(ops, iova, size); + pm_runtime_put_sync(smmu_domain->smmu->dev); + + return ret; } static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
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