Re: [BISECTED REGRESSION] b43legacy broken on G4 PowerBook

From: Larry Finger
Date: Wed Jun 12 2019 - 15:45:50 EST

On 6/12/19 1:55 AM, Christoph Hellwig wrote:

Ooops, yes. But I think we could just enable ZONE_DMA on 32-bit
powerpc. Crude enablement hack below:

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 8c1c636308c8..1dd71a98b70c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -372,7 +372,7 @@ config PPC_ADV_DEBUG_DAC_RANGE
config ZONE_DMA
bool
- default y if PPC_BOOK3E_64
+ default y
config PGTABLE_LEVELS
int


With the patch for Kconfig above, and the original patch setting ARCH_ZONE_DMA_BITS to 30, everything works.

Do you have any ideas on what should trigger the change in ARCH_ZONE_BITS? Should it be CONFIG_PPC32 defined, or perhaps CONFIG_G4_CPU defined?

Larry