On 16.08.19 18:43, Christoph Hellwig wrote:
> Hi Tobias,
>
> do you have CONFIG_DMA_CMA set in your config?  If not please make sure
> you have this commit in your testing tree, and if the problem still
> persists it would be a little odd and we'd have to dig deeper:
>
> commit dd3dcede9fa0a0b661ac1f24843f4a1b1317fdb6
> Author: Nicolin Chen <nicoleotsuka@gmail.com>
> Date:   Wed May 29 17:54:25 2019 -0700
>
>      dma-contiguous: fix !CONFIG_DMA_CMA version of dma_{alloc, free}_contiguous()
>

Hi Christoph,

yes CONFIG_DMA_CMA is set (=y, see attached config), the commit you 
mention above is included, if you have any hints how to go forward, 
please let me know!

Greetings,

Tobias