atm: eni: Add check for dma_map_single
As the potential failure of the dma_map_single(),
it should be better to check it and return error
if fails.
Fixes: 1da177e4c3
("Linux-2.6.12-rc2")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1112,6 +1112,8 @@ DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
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skb_data3 = skb->data[3];
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paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
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DMA_TO_DEVICE);
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if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
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return enq_next;
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ENI_PRV_PADDR(skb) = paddr;
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/* prepare DMA queue entries */
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j = 0;
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