dma-pool fixes

[Christoph Hellwig]

On Fri, Jul 31, 2020 at 01:16:34PM +0530, Amit Pundir wrote:
> Hi Nicolas, Christoph,
> 
> Just out of curiosity, I'm wondering if we can restore the earlier
> behaviour and make DMA atomic allocation configured thru platform
> specific device tree instead?
> 
> Or if you can allow a more hackish approach to restore the earlier
> logic, using of_machine_is_compatible() just for my device for the
> time being. Meanwhile I'm checking with other developers running the
> mainline kernel on sdm845 phones like OnePlus 6/6T, if they see this
> issue too.

If we don't find a fix for your platform I'm going to send Linus a
last minute revert this weekend, to stick to the no regressions policy.
I still hope we can fix the issue for real.