[PATCH 1/4] of: also handle dma-noncoherent in of_dma_is_coherent()

[Christoph Hellwig]

On Sun, Jun 19, 2022 at 10:32:09PM +0200, Heiko Stuebner wrote:
>  bool of_dma_is_coherent(struct device_node *np)
>  {
>  	struct device_node *node;
> +	bool ret = false;

I'd rename this to coherent or is_coherent.

>  
>  	if (IS_ENABLED(CONFIG_OF_DMA_DEFAULT_COHERENT))
> -		return true;
> +		ret = true;

And then do this at initialization time:

	bool is_coherent = IS_ENABLED(CONFIG_OF_DMA_DEFAULT_COHERENT);

but otherwise this looks good to me.