On Mon, Dec 06, 2021 at 09:59:03AM +0800, Lu Baolu wrote: > @@ -941,48 +944,44 @@ int host1x_client_iommu_attach(struct host1x_client *client) > * not the shared IOMMU domain, don't try to attach it to a different > * domain. This allows using the IOMMU-backed DMA API. > */ > - if (domain && domain != tegra->domain) > + client->group = NULL; > + if (!client->dev->iommu_group || (domain && domain != tegra->domain)) > + return iommu_device_set_dma_owner(client->dev, > + DMA_OWNER_DMA_API, NULL); > + > + if (!tegra->domain) > return 0; This if should be removed completely now Jason
