[2/5] DMA: dma_declare_coherent_memory() should return an error if unsupported

Commit Message

Guennadi Liakhovetski Aug. 19, 2010, 2:40 p.m. UTC

None

Patch

diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index ce29b81..77ce97f 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -163,7 +163,7 @@  static inline int
 dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
 			    dma_addr_t device_addr, size_t size, int flags)
 {
-	return 0;
+	return -EINVAL;
 }
 
 static inline void