[PATCH v9 1/5] RDMA/umem: Support importing dma-buf as user memory region

[Jason Gunthorpe]

On Mon, Nov 09, 2020 at 11:22:57AM -0800, Jianxin Xiong wrote:

> +	page_size = ib_umem_find_best_pgsz(&umem_dmabuf->umem, PAGE_SIZE,
> +					   umem_dmabuf->umem.iova);
> +
> +	if (WARN_ON(cur != end || page_size != PAGE_SIZE)) {
> +		ib_umem_dmabuf_unmap_pages(umem_dmabuf);
> +		return -EINVAL;
> +	}

This is not a warn_on situation, users can trigger this

Jason