linux-kernel - [PATCH 1/1] dmaengine: fix is_slave_direction() return false when DMA_DEV_TO

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Date: Tue, 23 Jan 2024 12:28:41 -0500
From: Frank Li <Frank.Li@....com>
To: Vinod Koul <vkoul@...nel.org>,
	Barry Song <Baohua.Song@....com>,
	dmaengine@...r.kernel.org (open list:DMA GENERIC OFFLOAD ENGINE SUBSYSTEM),
	linux-kernel@...r.kernel.org (open list)
Cc: imx@...ts.linux.dev
Subject: [PATCH 1/1] dmaengine: fix is_slave_direction() return false when DMA_DEV_TO_DEV

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@....com>
---
 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 3df70d6131c8f..752dbde4cec1f 100644
--- a/include/linux/dmaengine.h
+++ b/include/linux/dmaengine.h
@@ -953,7 +953,8 @@ 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(
-- 
2.34.1