[PATCH] m68k: don't select ARCH_HAS_DMA_PREP_COHERENT for nommu or coldfire

[Christoph Hellwig]

m68k only provides the dma_prep_coherent symbol when an mmu is enabled
and not on the coldfire platform.  Fix the Kconfig symbol selection
up to match this.

Fixes: 69878ef47562 ("m68k: Implement arch_dma_prep_coherent()")
Reported-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
 arch/m68k/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 8f765cfefca6..c518d695c376 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -5,7 +5,7 @@ config M68K
 	select ARCH_32BIT_OFF_T
 	select ARCH_HAS_BINFMT_FLAT
 	select ARCH_HAS_DMA_MMAP_PGPROT if MMU && !COLDFIRE
-	select ARCH_HAS_DMA_PREP_COHERENT
+	select ARCH_HAS_DMA_PREP_COHERENT if HAS_DMA && MMU && !COLDFIRE
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE if HAS_DMA
 	select ARCH_MIGHT_HAVE_PC_PARPORT if ISA
 	select ARCH_NO_COHERENT_DMA_MMAP if !MMU
-- 
2.20.1