netdev - [PATCH net-next 13/13] net: fec: fec_enet_rx_queue(): factor out VLAN handling into separate function fec_enet_rx

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Message-Id: <20241016-fec-cleanups-v1-13-de783bd15e6a@pengutronix.de>
Date: Wed, 16 Oct 2024 23:52:01 +0200
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: Wei Fang <wei.fang@....com>, Shenwei Wang <shenwei.wang@....com>, 
 Clark Wang <xiaoning.wang@....com>, "David S. Miller" <davem@...emloft.net>, 
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, 
 Paolo Abeni <pabeni@...hat.com>, Richard Cochran <richardcochran@...il.com>
Cc: imx@...ts.linux.dev, netdev@...r.kernel.org, 
 linux-kernel@...r.kernel.org, kernel@...gutronix.de, 
 Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH net-next 13/13] net: fec: fec_enet_rx_queue(): factor out
 VLAN handling into separate function fec_enet_rx_vlan()

In order to clean up of the VLAN handling, factor out the VLAN
handling into separate function fec_enet_rx_vlan().

Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
---
 drivers/net/ethernet/freescale/fec_main.c | 32 ++++++++++++++++++-------------
 1 file changed, 19 insertions(+), 13 deletions(-)

diff --git a/drivers/net/ethernet/freescale/fec_main.c b/drivers/net/ethernet/freescale/fec_main.c
index d9415c7c16cea3fc3d91e198c21af9fe9e21747e..e14000ba85586b9cd73151e62924c3b4597bb580 100644
--- a/drivers/net/ethernet/freescale/fec_main.c
+++ b/drivers/net/ethernet/freescale/fec_main.c
@@ -1672,6 +1672,22 @@ fec_enet_run_xdp(struct fec_enet_private *fep, struct bpf_prog *prog,
 	return ret;
 }
 
+static void fec_enet_rx_vlan(struct net_device *ndev, struct sk_buff *skb)
+{
+	struct vlan_ethhdr *vlan_header = skb_vlan_eth_hdr(skb);
+
+	if (ndev->features & NETIF_F_HW_VLAN_CTAG_RX) {
+		/* Push and remove the vlan tag */
+		u16 vlan_tag = ntohs(vlan_header->h_vlan_TCI);
+
+		memmove(skb->data + VLAN_HLEN, skb->data, ETH_ALEN * 2);
+		skb_pull(skb, VLAN_HLEN);
+		__vlan_hwaccel_put_tag(skb,
+				       htons(ETH_P_8021Q),
+				       vlan_tag);
+	}
+}
+
 /* During a receive, the bd_rx.cur points to the current incoming buffer.
  * When we update through the ring, if the next incoming buffer has
  * not been given to the system, we just set the empty indicator,
@@ -1812,19 +1828,9 @@ fec_enet_rx_queue(struct net_device *ndev, u16 queue_id, int budget)
 			ebdp = (struct bufdesc_ex *)bdp;
 
 		/* If this is a VLAN packet remove the VLAN Tag */
-		if ((ndev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
-		    fep->bufdesc_ex &&
-		    (ebdp->cbd_esc & cpu_to_fec32(BD_ENET_RX_VLAN))) {
-			/* Push and remove the vlan tag */
-			struct vlan_ethhdr *vlan_header = skb_vlan_eth_hdr(skb);
-			u16 vlan_tag = ntohs(vlan_header->h_vlan_TCI);
-
-			memmove(skb->data + VLAN_HLEN, skb->data, ETH_ALEN * 2);
-			skb_pull(skb, VLAN_HLEN);
-			__vlan_hwaccel_put_tag(skb,
-					       htons(ETH_P_8021Q),
-					       vlan_tag);
-		}
+		if (fep->bufdesc_ex &&
+		    (ebdp->cbd_esc & cpu_to_fec32(BD_ENET_RX_VLAN)))
+			fec_enet_rx_vlan(ndev, skb);
 
 		skb->protocol = eth_type_trans(skb, ndev);
 

-- 
2.45.2