[PATCH] nouveau: reset the bo resource bus info after an eviction

[Christian König]

Am 11.03.24 um 08:20 schrieb Dave Airlie:
> From: Dave Airlie <airlied at redhat.com>
>
> Later attempts to refault the bo won't happen and the whole
> GPU does to lunch. I think Christian's refactoring of this
> code out to the driver broke this not very well tested path.

Yeah that is certainly possible.

>
> Fixes: 141b15e59175 ("drm/nouveau: move io_reserve_lru handling into the driver v5")
> Cc: Christian König <christian.koenig at amd.com>
> Signed-off-by: Dave Airlie <airlied at redhat.com>

Acked-by: Christian König <christian.koenig at amd.com>

> ---
>   drivers/gpu/drm/nouveau/nouveau_bo.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
> index c6c544d7c911..a4e8f625fce6 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_bo.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
> @@ -1271,6 +1271,8 @@ nouveau_ttm_io_mem_reserve(struct ttm_device *bdev, struct ttm_resource *reg)
>   			drm_vma_node_unmap(&nvbo->bo.base.vma_node,
>   					   bdev->dev_mapping);
>   			nouveau_ttm_io_mem_free_locked(drm, nvbo->bo.resource);
> +			nvbo->bo.resource->bus.offset = 0;
> +			nvbo->bo.resource->bus.addr = NULL;
>   			goto retry;
>   		}
>