From: Jiasheng Jiang jiasheng@iscas.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@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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Nobuhiro Iwamatsu (CIP) nobuhiro1.iwamatsu@toshiba.co.jp --- 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 @@ -1766,7 +1766,10 @@ static int rcar_dmac_probe(struct platfo 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); + 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;