On Mon, Aug 14, 2023 at 02:32:33PM +0800, Baolu Lu wrote: > > + pm_runtime_get_sync(qcom_iommu->dev); > > + for (i = 0; i < fwspec->num_ids; i++) { > > + struct qcom_iommu_ctx *ctx = to_ctx(qcom_domain, fwspec->ids[i]); > > + > > + /* Disable the context bank: */ > > + iommu_writel(ctx, ARM_SMMU_CB_SCTLR, 0); > > + > > + ctx->domain = NULL; > > Does setting ctx->domain to NULL still match this semantics? Yes, I did not try to fix this driver. NULL means identity in the ctx->domain. Thanks, Jason