From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Mon, 14 Mar 2022 01:34:48 +0000 (+0800)
Subject: atm: eni: Add check for dma_map_single
X-Git-Tag: v5.10.108~22
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=09a7264fb0d020c2ba38f283d17221cb2c31a5ab;p=users%2Fdwmw2%2Flinux.git

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: 1da177e4c3f4 ("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>
---

diff --git a/drivers/atm/eni.c b/drivers/atm/eni.c
index b574cce98dc36..9fcc49be499f1 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;