linux-kernel - [PATCH 08/14] net: vlan: remove invalid VLAN protocol warning

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Message-Id: <20221107185452.90711-8-nbd@nbd.name>
Date:   Mon,  7 Nov 2022 19:54:46 +0100
From:   Felix Fietkau <nbd@....name>
To:     netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 08/14] net: vlan: remove invalid VLAN protocol warning

On MTK SoC ethernet, using NETIF_F_HW_VLAN_CTAG_RX in combination with hardware
special tag parsing can pass the special tag port metadata as VLAN protocol ID.
When the results is added as a skb hwaccel VLAN tag, it triggers a warning from
vlan_do_receive before calling the DSA tag receive function.
Remove this warning in order to properly pass the tag to the DSA receive function,
which will parse and clear it.

Signed-off-by: Felix Fietkau <nbd@....name>
---
 net/8021q/vlan.h | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/8021q/vlan.h b/net/8021q/vlan.h
index 5eaf38875554..3f9c0406b266 100644
--- a/net/8021q/vlan.h
+++ b/net/8021q/vlan.h
@@ -44,7 +44,6 @@ static inline int vlan_proto_idx(__be16 proto)
 	case htons(ETH_P_8021AD):
 		return VLAN_PROTO_8021AD;
 	default:
-		WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto));
 		return -EINVAL;
 	}
 }
-- 
2.38.1