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authorJiasheng Jiang2021-12-04 08:03:26 +0800
committerGreg Kroah-Hartman2021-12-05 14:25:00 +0100
commiteec91694f927d1026974444eb6a3adccd4f1cbc2 (patch)
tree8486945ad7fe5f4126d56c75a3ea5355e677e818
parent70602b37c4afd91c4dfc237121b31310b6c02a7a (diff)
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: 0a0c3b5a24bd ("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>
-rw-r--r--drivers/uio/uio_dmem_genirq.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/uio/uio_dmem_genirq.c b/drivers/uio/uio_dmem_genirq.c
index 6b5cfa5b0673..1106f3376404 100644
--- a/drivers/uio/uio_dmem_genirq.c
+++ b/drivers/uio/uio_dmem_genirq.c
@@ -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);