Messages in this thread Patch in this message | | | From | Jiasheng Jiang <> | Subject | [PATCH] uio: uio_dmem_genirq: Catch the Exception The return value of dma_set_coherent_mask() is not always 0. To catch the exception in case that dma is not support the mask. | Date | Thu, 2 Dec 2021 17:16:30 +0800 |
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Fixes: 0a0c3b5a24bd ("Add new uio device for dynamic memory allocation") Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn> --- drivers/uio/uio_dmem_genirq.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c index 6b5cfa5b0673..570f5be64b46 100644 --- a/drivers/uio/uio_dmem_genirq.c +++ b/drivers/uio/uio_dmem_genirq.c @@ -188,7 +188,9 @@ static int uio_dmem_genirq_probe(struct platform_device *pdev) return -ENOMEM; } - dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + ret = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); + if (ret) + return ret; priv->uioinfo = uioinfo; spin_lock_init(&priv->lock); -- 2.25.1
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