[PATCH] powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac

[Michael Ellerman]

On Thu, 2019-06-13 at 08:24:46 UTC, Christoph Hellwig wrote:
> With the strict dma mask checking introduced with the switch to
> the generic DMA direct code common wifi chips on 32-bit powerbooks
> stopped working.  Add a 30-bit ZONE_DMA to the 32-bit pmac builds
> to allow them to reliably allocate dma coherent memory.
> 
> Fixes: 65a21b71f948 ("powerpc/dma: remove dma_nommu_dma_supported")
> Reported-by: Aaro Koskinen <aaro.koskinen at iki.fi>
> Signed-off-by: Christoph Hellwig <hch at lst.de>
> Tested-by: Larry Finger <Larry.Finger at lwfinger.net>
> Acked-by: Larry Finger <Larry.Finger at lwfinger.net>
> Tested-by: Aaro Koskinen <aaro.koskinen at iki.fi>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/9739ab7eda459f0669ec9807e0d9be5020bab88c

cheers