Whoops! Was going through my unread emails and noticed I somehow missed this patch last month.

Reviewed-by: Lyude Paul lyude@redhat.com

I will push this to drm-misc-fixes in a little bit (assuming I don't find it there already)

On Tue, 2022-04-05 at 15:21 +0100, Robin Murphy wrote:

Even if some IOMMU has registered itself on the platform "bus", that doesn't necessarily mean it provides translation for the device we care about. Replace iommu_present() with a more appropriate check.

Signed-off-by: Robin Murphy robin.murphy@arm.com

drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c | 2 +-  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c index 992cc285f2fe..2ed528c065fa 100644 --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c @@ -123,7 +123,7 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev)           mutex_init(&tdev->iommu.mutex);   -       if (iommu_present(&platform_bus_type)) { +       if (device_iommu_mapped(dev)) {                 tdev->iommu.domain = iommu_domain_alloc(&platform_bus_type);                 if (!tdev->iommu.domain)                         goto error;