[POWERPC] Avoid DMA exception when using axon_msi with IOMMU

There's a brown-paper-bag bug in axon_msi, we pass the address of our
FIFO directly to the hardware, without DMA mapping it.  This leads to
DMA exceptions if you enable MSI & the IOMMU.

The fix is to correctly DMA map the fifo, dma_alloc_coherent() does
what we want - and we need to track the virt & phys addresses.

Signed-off-by: Michael Ellerman <[email protected]>
Acked-by: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Paul Mackerras <[email protected]>

0 files changed, 0 insertions, 0 deletions