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

[Larry Finger]

On 6/13/19 3:24 AM, 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>

As expected, it works. The patch needs
Cc: Stable <stable*vger.kernel.org> # v5.1+

Tested-by: Larry Finger <Larry.Finger at lwfinger.net>
Acked-by: Larry Finger <Larry.Finger at lwfinger.net>

Thanks for the help, and the patience with my debugging problems with u64 variables.

Larry