From: Felix Fietkau <nbd@nbd.name>
Date: Sat, 5 Feb 2022 18:29:22 +0100
Subject: [PATCH] net: ethernet: mtk_eth_soc: implement flow offloading
 to WED devices

This allows hardware flow offloading from Ethernet to WLAN on MT7622 SoC

Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---

--- a/drivers/net/ethernet/mediatek/mtk_wed.h
+++ b/drivers/net/ethernet/mediatek/mtk_wed.h
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -870,6 +870,7 @@ enum net_device_path_type {
 	DEV_PATH_BRIDGE,
 	DEV_PATH_PPPOE,
 	DEV_PATH_DSA,
+	DEV_PATH_MTK_WDMA,
 };
 
 struct net_device_path {
@@ -895,6 +896,12 @@ struct net_device_path {
 			int port;
 			u16 proto;
 		} dsa;
+		struct {
+			u8 wdma_idx;
+			u8 queue;
+			u16 wcid;
+			u8 bss;
+		} mtk_wdma;
 	};
 };
 
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -763,6 +763,10 @@ int dev_fill_forward_path(const struct n
 		if (WARN_ON_ONCE(last_dev == ctx.dev))
 			return -1;
 	}
+
+	if (!ctx.dev)
+		return ret;
+
 	path = dev_fwd_path(stack);
 	if (!path)
 		return -1;