# Re: \[PATCH v7 05/15\] swiotlb: Add a new get\_io\_tlb\_mem getter

- From: Claire Chang \<hidden\>
- Date: 2021-05-25 03:16:45 
- List: linux-devicetree
- Page: https://ratatoskr.run/linux-devicetree/2021/05/1390741
- Thread: https://ratatoskr.run/linux-devicetree/2021/05/1381603/t.md

```text
On Mon, May 24, 2021 at 11:51 PM Konrad Rzeszutek Wilk
[ref] wrote:
>
> On Tue, May 18, 2021 at 02:51:52PM +0800, Claire Chang wrote:
> > Still keep this function because directly using dev->dma_io_tlb_mem
> > will cause issues for memory allocation for existing devices. The pool
> > can't support atomic coherent allocation so we need to distinguish the
> > per device pool and the default pool in swiotlb_alloc.
>
> This above should really be rolled in the commit. You can prefix it by
> "The reason it was done this way was because directly using .."
>

Will add it.
```