Re: [PATCH] dell_rbu: stop abusing the DMA API

[Darren Hart]

On Tue, Jan 29, 2019 at 08:34:09AM +0100, Christoph Hellwig wrote:
> For some odd reason dell_rbu actually seems to want the physical and
> not a bus address for the allocated buffer.  Lets assume that actually
> is correct given that it is BIOS-related and that is a good source
> of insanity.  In that case we should not use dma_alloc_coherent with
> a NULL device to allocate memory, but use GFP_DMA32 to stay under
> the 32-bit BIOS limit.

+ Mario re bios related physical address - is Christoph's assumption
correct?

Christoph, did you observe a failure? If so, we should probably also
tag for stable.

-- 
Darren Hart
VMware Open Source Technology Center