From c64e2664e66f74e03ce9645236511c1d61154ed1 Mon Sep 17 00:00:00 2001 From: Jiasheng Jiang Date: Thu, 6 Jan 2022 11:09:39 +0800 Subject: [PATCH] dmaengine: sh: rcar-dmac: Check for error num after setting mask commit 2d21543efe332cd8c8f212fb7d365bc8b0690bfa upstream. Because of the possible failure of the dma_supported(), the dma_set_mask_and_coherent() may return error num. Therefore, it should be better to check it and return the error if fails. Fixes: dc312349e875 ("dmaengine: rcar-dmac: Widen DMA mask to 40 bits") Signed-off-by: Jiasheng Jiang Reviewed-by: Geert Uytterhoeven Link: https://lore.kernel.org/r/20220106030939.2644320-1-jiasheng@iscas.ac.cn Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/sh/rcar-dmac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/dma/sh/rcar-dmac.c b/drivers/dma/sh/rcar-dmac.c index f7ca57125ac7..e31fb3f91d07 100644 --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -1767,7 +1767,9 @@ static int rcar_dmac_probe(struct platform_device *pdev) 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 = dma_set_mask_and_coherent(dmac->dev, DMA_BIT_MASK(40)); + if (ret) + return ret; ret = rcar_dmac_parse_of(&pdev->dev, dmac); if (ret < 0) -- 2.20.1