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Date: Mon, 21 Feb 2022 09:50:19 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Geert Uytterhoeven <geert+renesas@...der.be>, Jiasheng Jiang <jiasheng@...as.ac.cn>, Vinod Koul <vkoul@...nel.org> Subject: [PATCH 5.15 187/196] dmaengine: sh: rcar-dmac: Check for error num after dma_set_max_seg_size From: Jiasheng Jiang <jiasheng@...as.ac.cn> commit da2ad87fba0891576aadda9161b8505fde81a84d upstream. 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@...der.be> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be> Link: https://lore.kernel.org/r/20220111011239.452837-1-jiasheng@iscas.ac.cn Signed-off-by: Vinod Koul <vkoul@...nel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> --- drivers/dma/sh/rcar-dmac.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) --- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -1868,7 +1868,10 @@ static int rcar_dmac_probe(struct platfo 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;
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