platforms/powernv: Fix update of NVLink DMA mask

[Michael Ellerman]

On Fri, 2016-08-01 at 00:35:09 UTC, Alistair Popple wrote:
> The emulated NVLink PCI devices share the same IODA2 TCE tables but
> only support a single TVT (instead of the normal two for PCI
> devices). This requires the kernel to manually replace windows with
> either the bypass or non-bypass window depending on what the driver
> has requested.
> 
> Unfortunately an incorrect optimisation was made in
> pnv_pci_ioda_dma_set_mask() which caused updating of some NPU device
> PEs to be skipped in certain configurations due to an incorrect
> assumption that a NULL peer PE in the array indicated there were no
> more peers present. This patch fixes the problem by ensuring all peer
> PEs are updated.
> 
> Signed-off-by: Alistair Popple <alistair at popple.id.au>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/419dbd5e1ff0e45a6e1d28c1f7

cheers