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uio: uio_dmem_genirq: Catch the Exception

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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.

Fixes: 0a0c3b5a24 ("Add new uio device for dynamic memory allocation")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20211204000326.1592687-1-jiasheng@iscas.ac.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jiasheng Jiang 2021-12-04 08:03:26 +08:00 committed by Greg Kroah-Hartman
parent 70602b37c4
commit eec91694f9
1 changed files with 5 additions and 1 deletions
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6
drivers/uio/uio_dmem_genirq.c
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@ -188,7 +188,11 @@ 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) {
dev_err(&pdev->dev, "DMA enable failed\n");
return ret;
}
priv->uioinfo = uioinfo;
spin_lock_init(&priv->lock);