diff mbox series

[4.14,35/45] dmaengine: sh: rcar-dmac: Check for error num after setting mask

Message ID 20220221084911.580279156@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Feb. 21, 2022, 8:49 a.m. UTC 
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(-)
diff mbox series

Patch

--- a/drivers/dma/sh/rcar-dmac.c
+++ b/drivers/dma/sh/rcar-dmac.c
@@ -1767,7 +1767,9 @@  static int rcar_dmac_probe(struct platfo
 	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)