Re: [PATCH 1/1] drm/nouveau/device: Get right pgsize_bitmap of iommu_domain

[Robin Murphy]

On 2021-12-18 07:45, Lu Baolu wrote:
> The suported page sizes of an iommu_domain are saved in the pgsize_bitmap
> field. Retrieve the value from the right place.
>
> Fixes: 58fd9375c2c534 ("drm/nouveau/platform: probe IOMMU if present")

...except domain->pgsize_bitmap was introduced more than a year after 
that commit ;)

As an improvement rather than a fix, though,

Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx>

> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> ---
>   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 d0d52c1d4aee..992cc285f2fe 100644
> --- a/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
> +++ b/drivers/gpu/drm/nouveau/nvkm/engine/device/tegra.c
> @@ -133,7 +133,7 @@ nvkm_device_tegra_probe_iommu(struct nvkm_device_tegra *tdev)
>   		 * or equal to the system's PAGE_SIZE, with a preference if
>   		 * both are equal.
>   		 */
> -		pgsize_bitmap = tdev->iommu.domain->ops->pgsize_bitmap;
> +		pgsize_bitmap = tdev->iommu.domain->pgsize_bitmap;
>   		if (pgsize_bitmap & PAGE_SIZE) {
>   			tdev->iommu.pgshift = PAGE_SHIFT;
>   		} else {