| From | Greg Kroah-Hartman <> | Subject | [PATCH 5.10 114/121] dmaengine: sh: rcar-dmac: Check for error num after setting mask | Date | Mon, 21 Feb 2022 09:50:06 +0100 |
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From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
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 <jiasheng@iscas.ac.cn> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lore.kernel.org/r/20220106030939.2644320-1-jiasheng@iscas.ac.cn Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- drivers/dma/sh/rcar-dmac.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
--- a/drivers/dma/sh/rcar-dmac.c +++ b/drivers/dma/sh/rcar-dmac.c @@ -1845,7 +1845,9 @@ 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); - 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)
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