[PATCH v2] atm: eni: Add check for dma_map_single

[PATCH v2] atm: eni: Add check for dma_map_single

[Jiasheng Jiang]

As the potential failure of the dma_map_single(),
it should be better to check it and return error
if fails.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
---
Changelog:

v1 -> v2

* Change 1. Change "enq_jam" to "enq_next".
---
 drivers/atm/eni.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/atm/eni.c b/drivers/atm/eni.c
index 422753d52244..a31ffe16e626 100644
--- a/drivers/atm/eni.c
+++ b/drivers/atm/eni.c
@@ -1112,6 +1112,8 @@ DPRINTK("iovcnt = %d\n",skb_shinfo(skb)->nr_frags);
 	skb_data3 = skb->data[3];
 	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;
-- 
2.25.1

Re: [PATCH v2] atm: eni: Add check for dma_map_single

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@davemloft.net>:

On Mon, 14 Mar 2022 09:34:48 +0800 you wrote:
> As the potential failure of the dma_map_single(),
> it should be better to check it and return error
> if fails.
> 
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
> 
> [...]

Here is the summary with links:
  - [v2] atm: eni: Add check for dma_map_single
    https://git.kernel.org/netdev/net/c/0f74b29a4f53

You are awesome, thank you!
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