[PATCH] dmaengine: xilinx_dma: Set dma_device directions

[Thomas Gessler]

Coalesce the direction bits from the enabled TX and/or RX channels into
the directions bit mask of dma_device. Without this mask set,
dma_get_slave_caps() in the DMAEngine fails, which prevents the driver
from being used with an IIO DMAEngine buffer.

Signed-off-by: Thomas Gessler <thomas.gessler at brueckmann-gmbh.de>
---
 drivers/dma/xilinx/xilinx_dma.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
index 108a7287f4cd..641aaf0c0f1c 100644
--- a/drivers/dma/xilinx/xilinx_dma.c
+++ b/drivers/dma/xilinx/xilinx_dma.c
@@ -3205,6 +3205,10 @@ static int xilinx_dma_probe(struct platform_device *pdev)
 		}
 	}
 
+	for (i = 0; i < xdev->dma_config->max_channels; i++)
+		if (xdev->chan[i])
+			xdev->common.directions |= xdev->chan[i]->direction;
+
 	if (xdev->dma_config->dmatype == XDMA_TYPE_VDMA) {
 		for (i = 0; i < xdev->dma_config->max_channels; i++)
 			if (xdev->chan[i])
-- 
2.43.0