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atm: eni: Add check for dma_map_single 

[ Upstream commit 0f74b29a4f53627376cf5a5fb7b0b3fa748a0b2b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Jiasheng Jiang 2022-03-14 09:34:48 +08:00 committed by Greg Kroah-Hartman
parent 268dcf1f7b
commit 97ccef56e5
1 changed files with 2 additions and 0 deletions
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2
drivers/atm/eni.c
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@ -1116,6 +1116,8 @@ DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
}
paddr = dma_map_single(&eni_dev->pci_dev->dev,skb->data,skb->len,
DMA_TO_DEVICE);
if (dma_mapping_error(&eni_dev->pci_dev->dev, paddr))
return enq_next;
ENI_PRV_PADDR(skb) = paddr;
/* prepare DMA queue entries */
j = 0;