summaryrefslogtreecommitdiff
path: root/include/linux/dma-direction.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/dma-direction.h')
-rw-r--r--include/linux/dma-direction.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/dma-direction.h b/include/linux/dma-direction.h
index 9c96e30e6a0b..a2fe4571bc92 100644
--- a/include/linux/dma-direction.h
+++ b/include/linux/dma-direction.h
@@ -9,4 +9,10 @@ enum dma_data_direction {
DMA_NONE = 3,
};
-#endif
+static inline int valid_dma_direction(enum dma_data_direction dir)
+{
+ return dir == DMA_BIDIRECTIONAL || dir == DMA_TO_DEVICE ||
+ dir == DMA_FROM_DEVICE;
+}
+
+#endif /* _LINUX_DMA_DIRECTION_H */