diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index 79d89bad5132..26ed81cfeee8 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -443,15 +443,20 @@ fail: return ret; } -static void msm_iommu_set_platform_dma(struct device *dev) +static int msm_iommu_identity_attach(struct iommu_domain *identity_domain, + struct device *dev) { struct iommu_domain *domain = iommu_get_domain_for_dev(dev); - struct msm_priv *priv = to_msm_priv(domain); + struct msm_priv *priv; unsigned long flags; struct msm_iommu_dev *iommu; struct msm_iommu_ctx_dev *master; - int ret; + int ret = 0; + if (domain == identity_domain || !domain) + return 0; + + priv = to_msm_priv(domain); free_io_pgtable_ops(priv->iop); spin_lock_irqsave(&msm_iommu_lock, flags); @@ -468,8 +473,18 @@ static void msm_iommu_set_platform_dma(struct device *dev) } fail: spin_unlock_irqrestore(&msm_iommu_lock, flags); + return ret; } +static struct iommu_domain_ops msm_iommu_identity_ops = { + .attach_dev = msm_iommu_identity_attach, +}; + +static struct iommu_domain msm_iommu_identity_domain = { + .type = IOMMU_DOMAIN_IDENTITY, + .ops = &msm_iommu_identity_ops, +}; + static int msm_iommu_map(struct iommu_domain *domain, unsigned long iova, phys_addr_t pa, size_t pgsize, size_t pgcount, int prot, gfp_t gfp, size_t *mapped) @@ -675,10 +690,10 @@ fail: } static struct iommu_ops msm_iommu_ops = { + .identity_domain = &msm_iommu_identity_domain, .domain_alloc = msm_iommu_domain_alloc, .probe_device = msm_iommu_probe_device, .device_group = generic_device_group, - .set_platform_dma_ops = msm_iommu_set_platform_dma, .pgsize_bitmap = MSM_IOMMU_PGSIZES, .of_xlate = qcom_iommu_of_xlate, .default_domain_ops = &(const struct iommu_domain_ops) {