[PATCH 5.15 301/476] dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Frank Li <Frank.Li@xxxxxxx>

[ Upstream commit a22fe1d6dec7e98535b97249fdc95c2be79120bb ]

is_slave_direction() should return true when direction is DMA_DEV_TO_DEV.

Fixes: 49920bc66984 ("dmaengine: add new enum dma_transfer_direction")
Signed-off-by: Frank Li <Frank.Li@xxxxxxx>
Link: https://lore.kernel.org/r/20240123172842.3764529-1-Frank.Li@xxxxxxx
Signed-off-by: Vinod Koul <vkoul@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 include/linux/dmaengine.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/include/linux/dmaengine.h b/include/linux/dmaengine.h
index 9000f3ffce8b..04826a793039 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -959,7 +959,8 @@ static inline int dmaengine_slave_config(struct dma_chan *chan,
 
 static inline bool is_slave_direction(enum dma_transfer_direction direction)
 {
-	return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM);
+	return (direction == DMA_MEM_TO_DEV) || (direction == DMA_DEV_TO_MEM) ||
+	       (direction == DMA_DEV_TO_DEV);
 }
 
 static inline struct dma_async_tx_descriptor *dmaengine_prep_slave_single(
-- 
2.43.0







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