This function helps to distinguish the slave type of transfer by checking the
direction parameter.
Signed-off-by: Andy Shevchenko <andriy.shevche...@linux.intel.com>
Reviewed-by: Viresh Kumar <viresh.ku...@linaro.org>
Reviewed-by: Mika Westerberg <mika.westerb...@linux.intel.com>
Reviewed-by: Linus Walleij <linus.wall...@linaro.org>
Cc: Nicolas Ferre <nicolas.fe...@atmel.com>
Cc: Guennadi Liakhovetski <g.liakhovet...@gmx.de>
---
include/linux/dmaengine.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 4ca9cf7..b196ea3 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -621,6 +621,11 @@ static inline int dmaengine_slave_config(struct dma_chan
*chan,
(unsigned long)config);
}
+static inline bool is_slave_xfer(enum dma_transfer_direction direction)
+{
+ return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM);
+}
+
static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
struct dma_chan *chan, dma_addr_t buf, size_t len,
enum dma_transfer_direction dir, unsigned long flags)
--
1.7.10.4
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