Commit eec91694 authored by 蒋家盛's avatar 蒋家盛 Committed by Greg Kroah-Hartman
Browse files

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.

Fixes: 0a0c3b5a ("Add new uio device for dynamic memory allocation")
Signed-off-by: default avatarJiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20211204000326.1592687-1-jiasheng@iscas.ac.cn


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 70602b37

drivers/uio/uio_dmem_genirq.c

+5 −1
Original line number Diff line number Diff line
@@ -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);