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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/net/8021q/vlan.h
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@@ -36,7 +36,7 @@
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 	struct rcu_head		rcu;
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 };
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-static inline unsigned int vlan_proto_idx(__be16 proto)
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+static inline int vlan_proto_idx(__be16 proto)
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 {
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 	switch (proto) {
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 	case htons(ETH_P_8021Q):
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@@ -44,8 +44,8 @@
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 	case htons(ETH_P_8021AD):
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 		return VLAN_PROTO_8021AD;
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 	default:
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-		BUG();
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-		return 0;
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+		WARN(1, "invalid VLAN protocol: 0x%04x\n", ntohs(proto));
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+		return -EINVAL;
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 	}
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 }
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@@ -64,17 +64,24 @@
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 						       __be16 vlan_proto,
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 						       u16 vlan_id)
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 {
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-	return __vlan_group_get_device(vg, vlan_proto_idx(vlan_proto), vlan_id);
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+	int pidx = vlan_proto_idx(vlan_proto);
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+
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+	if (pidx < 0)
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+		return NULL;
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+
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+	return __vlan_group_get_device(vg, pidx, vlan_id);
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 }
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 static inline void vlan_group_set_device(struct vlan_group *vg,
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 					 __be16 vlan_proto, u16 vlan_id,
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 					 struct net_device *dev)
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 {
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+	int pidx = vlan_proto_idx(vlan_proto);
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 	struct net_device **array;
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-	if (!vg)
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+
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+	if (!vg || pidx < 0)
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 		return;
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-	array = vg->vlan_devices_arrays[vlan_proto_idx(vlan_proto)]
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+	array = vg->vlan_devices_arrays[pidx]
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 				       [vlan_id / VLAN_GROUP_ARRAY_PART_LEN];
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 	array[vlan_id % VLAN_GROUP_ARRAY_PART_LEN] = dev;
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 }
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@@ -92,6 +99,18 @@
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 	return NULL;
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 }
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+static inline netdev_features_t vlan_tnl_features(struct net_device *real_dev)
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+{
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+	netdev_features_t ret;
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+
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+	ret = real_dev->hw_enc_features &
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+	      (NETIF_F_CSUM_MASK | NETIF_F_ALL_TSO | NETIF_F_GSO_ENCAP_ALL);
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+
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+	if ((ret & NETIF_F_GSO_ENCAP_ALL) && (ret & NETIF_F_CSUM_MASK))
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+		return (ret & ~NETIF_F_CSUM_MASK) | NETIF_F_HW_CSUM;
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+	return 0;
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+}
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+
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 #define vlan_group_for_each_dev(grp, i, dev) \
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 	for ((i) = 0; i < VLAN_PROTO_NUM * VLAN_N_VID; i++) \
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 		if (((dev) = __vlan_group_get_device((grp), (i) / VLAN_N_VID, \