netdev - [PATCH] net: dsa: tag_brcm: legacy: reorganize functions

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Message-Id: <20250530155618.273567-2-noltari@gmail.com>
Date: Fri, 30 May 2025 17:56:16 +0200
From: Álvaro Fernández Rojas <noltari@...il.com>
To: jonas.gorski@...il.com,
	florian.fainelli@...adcom.com,
	andrew@...n.ch,
	olteanv@...il.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com,
	horms@...nel.org,
	netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	dgcbueu@...il.com
Cc: Álvaro Fernández Rojas <noltari@...il.com>
Subject: [PATCH] net: dsa: tag_brcm: legacy: reorganize functions

Move brcm_leg_tag_rcv() definition to top.
This function is going to be shared between two different tags.

Signed-off-by: Álvaro Fernández Rojas <noltari@...il.com>
---
 net/dsa/tag_brcm.c | 64 +++++++++++++++++++++++-----------------------
 1 file changed, 32 insertions(+), 32 deletions(-)

diff --git a/net/dsa/tag_brcm.c b/net/dsa/tag_brcm.c
index fe75821623a4f..9f4b0bcd95cde 100644
--- a/net/dsa/tag_brcm.c
+++ b/net/dsa/tag_brcm.c
@@ -213,6 +213,38 @@ MODULE_ALIAS_DSA_TAG_DRIVER(DSA_TAG_PROTO_BRCM, BRCM_NAME);
 #endif
 
 #if IS_ENABLED(CONFIG_NET_DSA_TAG_BRCM_LEGACY)
+static struct sk_buff *brcm_leg_tag_rcv(struct sk_buff *skb,
+					struct net_device *dev)
+{
+	int len = BRCM_LEG_TAG_LEN;
+	int source_port;
+	u8 *brcm_tag;
+
+	if (unlikely(!pskb_may_pull(skb, BRCM_LEG_TAG_LEN + VLAN_HLEN)))
+		return NULL;
+
+	brcm_tag = dsa_etype_header_pos_rx(skb);
+
+	source_port = brcm_tag[5] & BRCM_LEG_PORT_ID;
+
+	skb->dev = dsa_conduit_find_user(dev, 0, source_port);
+	if (!skb->dev)
+		return NULL;
+
+	/* VLAN tag is added by BCM63xx internal switch */
+	if (netdev_uses_dsa(skb->dev))
+		len += VLAN_HLEN;
+
+	/* Remove Broadcom tag and update checksum */
+	skb_pull_rcsum(skb, len);
+
+	dsa_default_offload_fwd_mark(skb);
+
+	dsa_strip_etype_header(skb, len);
+
+	return skb;
+}
+
 static struct sk_buff *brcm_leg_tag_xmit(struct sk_buff *skb,
 					 struct net_device *dev)
 {
@@ -250,38 +282,6 @@ static struct sk_buff *brcm_leg_tag_xmit(struct sk_buff *skb,
 	return skb;
 }
 
-static struct sk_buff *brcm_leg_tag_rcv(struct sk_buff *skb,
-					struct net_device *dev)
-{
-	int len = BRCM_LEG_TAG_LEN;
-	int source_port;
-	u8 *brcm_tag;
-
-	if (unlikely(!pskb_may_pull(skb, BRCM_LEG_TAG_LEN + VLAN_HLEN)))
-		return NULL;
-
-	brcm_tag = dsa_etype_header_pos_rx(skb);
-
-	source_port = brcm_tag[5] & BRCM_LEG_PORT_ID;
-
-	skb->dev = dsa_conduit_find_user(dev, 0, source_port);
-	if (!skb->dev)
-		return NULL;
-
-	/* VLAN tag is added by BCM63xx internal switch */
-	if (netdev_uses_dsa(skb->dev))
-		len += VLAN_HLEN;
-
-	/* Remove Broadcom tag and update checksum */
-	skb_pull_rcsum(skb, len);
-
-	dsa_default_offload_fwd_mark(skb);
-
-	dsa_strip_etype_header(skb, len);
-
-	return skb;
-}
-
 static const struct dsa_device_ops brcm_legacy_netdev_ops = {
 	.name = BRCM_LEGACY_NAME,
 	.proto = DSA_TAG_PROTO_BRCM_LEGACY,
-- 
2.39.5