Subject: [PATCH] net: ethernet: mtk_eth_soc: account for vlan in rx header length
From: Felix Fietkau <[email-masked]>
Date: Thu, 27 Oct 2022 19:50:31 +0200

The network stack assumes that devices can handle an extra VLAN tag without
increasing the MTU

Signed-off-by: Felix Fietkau <[email-masked]>
---

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -29,7 +29,7 @@
 #define MTK_TX_DMA_BUF_LEN_V2	0xffff
 #define MTK_DMA_SIZE		512
 #define MTK_MAC_COUNT		2
-#define MTK_RX_ETH_HLEN		(ETH_HLEN + ETH_FCS_LEN)
+#define MTK_RX_ETH_HLEN		(VLAN_ETH_HLEN + ETH_FCS_LEN)
 #define MTK_RX_HLEN		(NET_SKB_PAD + MTK_RX_ETH_HLEN + NET_IP_ALIGN)
 #define MTK_DMA_DUMMY_DESC	0xffffffff
 #define MTK_DEFAULT_MSG_ENABLE	(NETIF_MSG_DRV | \