Re: [PATCH] dmaengine: xilinx_dma: Set max segment size

From: Folker Schwesinger
Date: Fri Mar 14 2025 - 11:10:14 EST


On Fri Mar 14, 2025 at 2:47 PM CET, Thomas Gessler wrote:
> Set the maximumg DMA segment size from the actual core configuration
> value. Without this setting, the default value of 64 KiB is reported,
> and larger sizes cannot be used for IIO DMAEngine buffers.
>
> Signed-off-by: Thomas Gessler <thomas.gessler@xxxxxxxxxxxxxxxxxx>

Tested-by: Folker Schwesinger <dev@xxxxxxxxxxxxxxxxxxxxx>

> ---
> drivers/dma/xilinx/xilinx_dma.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/dma/xilinx/xilinx_dma.c b/drivers/dma/xilinx/xilinx_dma.c
> index 108a7287f4cd..4b4a299e3807 100644
> --- a/drivers/dma/xilinx/xilinx_dma.c
> +++ b/drivers/dma/xilinx/xilinx_dma.c
> @@ -3114,6 +3114,8 @@ static int xilinx_dma_probe(struct platform_device *pdev)
> }
> }
>
> + dma_set_max_seg_size(xdev->dev, xdev->max_buffer_len);
> +
> if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) {
> xdev->has_axistream_connected =
> of_property_read_bool(node, "xlnx,axistream-connected");