[PATCH 2/3] dmaengine: xilinx: xdma: Better handling of the busy variable

[Miquel Raynal <miquel.raynal@bootlin.com>]

The driver internal scatter-gather logic is:
- set busy to true
- start transfer
<irq>
- set busy to false
- trigger next transfer if any
  - set busy to true

Setting busy to false in cyclic transfers does not make any sense and is
conceptually wrong. In order to ease the integration of additional
callbacks let's move this change to a scatter-gather-only path.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
---
 drivers/dma/xilinx/xdma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/xilinx/xdma.c b/drivers/dma/xilinx/xdma.c
index 75533e787414..caddd741a79c 100644
--- a/drivers/dma/xilinx/xdma.c
+++ b/drivers/dma/xilinx/xdma.c
@@ -745,7 +745,6 @@ static irqreturn_t xdma_channel_isr(int irq, void *dev_id)
 	if (!vd)
 		goto out;
 
-	xchan->busy = false;
 	desc = to_xdma_desc(vd);
 	xdev = xchan->xdev_hdl;
 
@@ -768,6 +767,8 @@ static irqreturn_t xdma_channel_isr(int irq, void *dev_id)
 		goto out;
 	}
 
+	xchan->busy = false;
+
 	/*
 	 * if all data blocks are transferred, remove and complete the request
 	 */
-- 
2.34.1