netdev - [PATCH] net: hisilicon: hns: fix error return code of hns_nic_clear_all_rx

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Date:   Sun,  7 Mar 2021 00:40:12 -0800
From:   Jia-Ju Bai <baijiaju1990@...il.com>
To:     yisen.zhuang@...wei.com, salil.mehta@...wei.com,
        davem@...emloft.net, kuba@...nel.org, tariqt@...lanox.com,
        jesse.brandeburg@...el.com, dinghao.liu@....edu.cn,
        trix@...hat.com, song.bao.hua@...ilicon.com, Jason@...c4.com,
        wanghai38@...wei.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jia-Ju Bai <baijiaju1990@...il.com>
Subject: [PATCH] net: hisilicon: hns: fix error return code of hns_nic_clear_all_rx_fetch()

When hns_assemble_skb() returns NULL to skb, no error return code of
hns_nic_clear_all_rx_fetch() is assigned.
To fix this bug, ret is assigned with -ENOMEM in this case.

Reported-by: TOTE Robot <oslab@...nghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@...il.com>
---
 drivers/net/ethernet/hisilicon/hns/hns_enet.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 5d7824d2b4d4..c66a7a51198e 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -1663,8 +1663,10 @@ static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
 			for (j = 0; j < fetch_num; j++) {
 				/* alloc one skb and init */
 				skb = hns_assemble_skb(ndev);
-				if (!skb)
+				if (!skb) {
+					ret = -ENOMEM;
 					goto out;
+				}
 				rd = &tx_ring_data(priv, skb->queue_mapping);
 				hns_nic_net_xmit_hw(ndev, skb, rd);
 
-- 
2.17.1