Quoting Matthew Auld (2017-07-25 20:21:18)
> @@ -471,25 +473,31 @@ i915_vma_insert(struct i915_vma *vma, u64 size, u64 
> alignment, u64 flags)
>         if (ret)
>                 return ret;
>  

GEM_BUG_ON(vma->pages);

> +       if (!vma->pages) {
> +               ret = vma->vm->set_pages(vma);
> +               if (ret)
> +                       goto err_unpin;
> +       }

If we have not been inserted, vma->bind_flags == 0 and so vma->page must
be NULL.
-Chris
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