Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Li Zhong <floridsleeves@gmail.com>
To:     linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Cc:     jgg@ziepe.ca, william.xuanziyang@huawei.com, pabeni@redhat.com,
        kuba@kernel.org, edumazet@google.com, davem@davemloft.net,
        Li Zhong <floridsleeves@gmail.com>
Subject: [PATCH v1] net/8021q/vlan: check the return value of vlan_vid_add()
Date:   Mon, 19 Sep 2022 00:46:00 -0700
Message-Id: <20220919074600.1576168-1-floridsleeves@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

Check the return value of vlan_vid_add() which could fail and return
error code.

Signed-off-by: Li Zhong <floridsleeves@gmail.com>
---
 net/8021q/vlan.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/8021q/vlan.c b/net/8021q/vlan.c
index e40aa3e3641c..e96aefd00a6e 100644
--- a/net/8021q/vlan.c
+++ b/net/8021q/vlan.c
@@ -382,7 +382,10 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
 	    (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER)) {
 		pr_info("adding VLAN 0 to HW filter on device %s\n",
 			dev->name);
-		vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
+		int err = vlan_vid_add(dev, htons(ETH_P_8021Q), 0);
+
+		if (err)
+			return notifier_from_errno(err);
 	}
 	if (event == NETDEV_DOWN &&
 	    (dev->features & NETIF_F_HW_VLAN_CTAG_FILTER))
-- 
2.25.1