From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/linux/dma-direction.h | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/kernel/include/linux/dma-direction.h b/kernel/include/linux/dma-direction.h
index 9c96e30..a2fe457 100644
--- a/kernel/include/linux/dma-direction.h
+++ b/kernel/include/linux/dma-direction.h
@@ -9,4 +9,10 @@
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 */
--
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