Re: [PATCH v3 18/18] drm/tegra: Use the iommu dma_owner mechanism

[Lu Baolu]

On 12/6/21 8:40 PM, Jason Gunthorpe wrote:
> 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

Sure.

Best regards,
baolu