[PATCH AUTOSEL 4.14 074/115] dmaengine: rcar-dmac: set scatter/gather max segment size

Sasha Levin
2019-11-13T02:12:24Z

From: Wolfram Sang <wsa+renesas@sang-engineering.com>

[ Upstream commit 97d49c59e219acac576e16293a6b8cb99302f62f ]

Fix warning when running with CONFIG_DMA_API_DEBUG_SG=y by allocating a
device_dma_parameters structure and filling in the max segment size.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/dma/sh/rcar-dmac.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 19c7433e83097..f7ca57125ac7c 100644
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -200,6 +200,7 @@ struct rcar_dmac {
struct dma_device engine;
struct device *dev;
void __iomem *iomem;
+ struct device_dma_parameters parms;

unsigned int n_channels;
struct rcar_dmac_chan *channels;
@@ -1764,6 +1765,8 @@ static int rcar_dmac_probe(struct platform_device *pdev)

dmac->dev = &pdev->dev;
platform_set_drvdata(pdev, dmac);
+ dmac->dev->dma_parms = &dmac->parms;
+ dma_set_max_seg_size(dmac->dev, RCAR_DMATCR_MASK);
dma_set_mask_and_coherent(dmac->dev, DMA_BIT_MASK(40));

ret = rcar_dmac_parse_of(&pdev->dev, dmac);
--
2.20.1