---

yaml --- r: 69569 b: refs/heads/master c: 32e8f70 h: refs/heads/master i: 69567: 71f1e08 v: v3
git-mirror · Oct 16, 2007 · 1674e91 · 1674e91
1 parent 81eaaa8
commit 1674e91
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 64da82efae0d7b5f7c478021840fd329f76d965d
+refs/heads/master: 32e8f70230c0c417490787b3f48b6ed6c48e7ec9
diff --git a/trunk/include/linux/dma-mapping.h b/trunk/include/linux/dma-mapping.h
@@ -24,13 +24,20 @@ enum dma_data_direction {
 #define DMA_28BIT_MASK	0x000000000fffffffULL
 #define DMA_24BIT_MASK	0x0000000000ffffffULL
 
+#define DMA_MASK_NONE	0x0ULL
+
 static inline int valid_dma_direction(int dma_direction)
 {
 	return ((dma_direction == DMA_BIDIRECTIONAL) ||
 		(dma_direction == DMA_TO_DEVICE) ||
 		(dma_direction == DMA_FROM_DEVICE));
 }
 
+static inline int is_device_dma_capable(struct device *dev)
+{
+	return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
+}
+
 #ifdef CONFIG_HAS_DMA
 #include <asm/dma-mapping.h>
 #else