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powerpc: enable a 30-bit ZONE_DMA for 32-bit pmac

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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: 65a21b71f9 ("powerpc/dma: remove dma_nommu_dma_supported")
Reported-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Larry Finger <Larry.Finger@lwfinger.net>
Acked-by: Larry Finger <Larry.Finger@lwfinger.net>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christoph Hellwig
2019-06-13 10:24:46 +02:00
committed by Michael Ellerman
parent 84b028243e
commit 9739ab7eda
3 changed files with 10 additions and 1 deletions
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1
arch/powerpc/platforms/powermac/Kconfig
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@@ -7,6 +7,7 @@ config PPC_PMAC
select PPC_INDIRECT_PCI if PPC32
select PPC_MPC106 if PPC32
select PPC_NATIVE
select ZONE_DMA if PPC32
default y
config PPC_PMAC64