On Thu, 5 Sep 2013, Catalin Marinas wrote:

On Thu, Aug 29, 2013 at 07:32:24PM +0100, Stefano Stabellini wrote:

quoted

Signed-off-by: Stefano Stabellini <redacted>
CC: catalin.marinas at arm.com
CC: will.deacon at arm.com
---
 arch/arm64/include/asm/dma-mapping.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 8d18100..c2cb8a0 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h

@@ -25,6 +25,7 @@
 
 #define ARCH_HAS_DMA_GET_REQUIRED_MASK
 
+#define DMA_ERROR_CODE	(~0)

I wonder why this isn't more generic. It looks like most (all?)
architectures define it in the same way.

Actually it's defined as 0 on x86 and ia64.
All the others define it as ~0.