Re: [BISECTED REGRESSION] b43legacy broken on G4 PowerBook

Larry Finger <Larry.Finger@xxxxxxxxxxxx> · Wed, 12 Jun 2019 14:41:06 -0500

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







