[PATCHv3 net-next 21/22] net: mvpp2: set dma mask and coherent dma mask on PPv2.2

[Thomas Petazzoni]

Hello,

On Tue, 7 Mar 2017 17:24:21 +0000, David Laight wrote:

> Are the coherent mappings just used for ring structures?
> If it might be reasonable to allocate them as a single entity,
> thus guaranteeing they all reside in a single 4G region.

Do we have the guarantee that a DMA coherent allocation will not span a
4G boundary?

Thanks,

Thomas
-- 
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com