[PATCH 00/11] powerpv/powernv: Restore pnv_npu_try_dma_set_bypass()

[Reza Arbab]

On Wed, Oct 30, 2019 at 06:53:41PM +0100, Christoph Hellwig wrote:
>How do you even use this code?  Nothing in the kernel even calls
>dma_set_mask for NPU devices, as we only suport vfio pass through.

You use it by calling dma_set_mask() for the *GPU* device. The purpose 
of pnv_npu_try_dma_set_bypass() is to then propagate the same bypass 
configuration to all the NPU devices associated with that GPU.

-- 
Reza Arbab