[ARM] Add dma_mapping_error() definition.

diff --git a/include/asm-arm/dma-mapping.h b/include/asm-arm/dma-mapping.h
index 77345826124a4c77e0ff1c95d799c7d1db5a884a..84f16fadef30cbfe09ac801b2142a3e23416097b 100644 (file)
--- a/include/asm-arm/dma-mapping.h
+++ b/include/asm-arm/dma-mapping.h
@@ -352,5 +352,13 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
        }
 }
 
+/*
+ * DMA errors are defined by all-bits-set in the DMA address.
+ */
+static inline int dma_mapping_error(dma_addr_t dma_addr)
+{
+       return dma_addr == ~0;
+}
+
 #endif /* __KERNEL__ */
 #endif