dmaengine: stm32-dma: use dma_set_max_seg_size to set the sg limit

This patch adds dma_set_max_seg_size to define sg dma constraint.
This constraint may be taken into account by client to scatter/gather
its buffer.

Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Link: https://lore.kernel.org/r/20200129153628.29329-6-amelie.delaunay@st.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/stm32-dma.c b/drivers/dma/stm32-dma.c
index 25f7281..b7e18cf 100644 (file)
--- a/drivers/dma/stm32-dma.c
+++ b/drivers/dma/stm32-dma.c
@@ -1323,6 +1323,8 @@ static int stm32_dma_probe(struct platform_device *pdev)
                reset_control_deassert(rst);
        }
 
+       dma_set_max_seg_size(&pdev->dev, STM32_DMA_ALIGNED_MAX_DATA_ITEMS);
+
        dma_cap_set(DMA_SLAVE, dd->cap_mask);
        dma_cap_set(DMA_PRIVATE, dd->cap_mask);
        dma_cap_set(DMA_CYCLIC, dd->cap_mask);