dmaengine: sh: rcar-dmac: Check for error num after dma_set_max_seg_size

As the possible failure of the dma_set_max_seg_size(), it should be
better to check the return value of the dma_set_max_seg_size().

Fixes: 97d49c59e219 ("dmaengine: rcar-dmac: set scatter/gather max segment size")
Reported-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20220111011239.452837-1-jiasheng@iscas.ac.cn
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c
index 4a34ddd..13d12d6 100644 (file)
--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1868,7 +1868,10 @@ static int rcar_dmac_probe(struct platform_device *pdev)
 
        dmac->dev = &pdev->dev;
        platform_set_drvdata(pdev, dmac);
-       dma_set_max_seg_size(dmac->dev, RCAR_DMATCR_MASK);
+       ret = dma_set_max_seg_size(dmac->dev, RCAR_DMATCR_MASK);
+       if (ret)
+               return ret;
+
        ret = dma_set_mask_and_coherent(dmac->dev, DMA_BIT_MASK(40));
        if (ret)
                return ret;