Re: platforms/powernv: Fix update of NVLink DMA mask

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 <redacted>

Applied to powerpc next, thanks.

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

cheers