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Message-Id: <20220314013448.2340361-1-jiasheng@iscas.ac.cn> Date: Mon, 14 Mar 2022 09:34:48 +0800 From: Jiasheng Jiang <jiasheng@...as.ac.cn> To: kuba@...nel.org Cc: 3chas3@...il.com, linux-atm-general@...ts.sourceforge.net, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn> Subject: [PATCH v2] 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: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jiasheng Jiang <jiasheng@...as.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
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