netdev - [PATCH v2 net-next 16/16] net: dsa: tag_rtl4_a: use the generic flow dissector procedure

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Message-Id: <20200926173108.1230014-17-vladimir.oltean@nxp.com>
Date:   Sat, 26 Sep 2020 20:31:08 +0300
From:   Vladimir Oltean <vladimir.oltean@....com>
To:     netdev@...r.kernel.org, davem@...emloft.net
Cc:     andrew@...n.ch, f.fainelli@...il.com, vivien.didelot@...il.com,
        kuba@...nel.org
Subject: [PATCH v2 net-next 16/16] net: dsa: tag_rtl4_a: use the generic flow dissector procedure

The Realtek 4 byte A tag is placed before the EtherType, so refactor the
.flow_dissect procedure to call the common helper created for this
specific case.

Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: DENG Qingfang <dqfext@...il.com>
Cc: Mauri Sandberg <sandberg@...lfence.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 net/dsa/tag_rtl4_a.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/net/dsa/tag_rtl4_a.c b/net/dsa/tag_rtl4_a.c
index 868980ba1fcd..d2237a6a06d6 100644
--- a/net/dsa/tag_rtl4_a.c
+++ b/net/dsa/tag_rtl4_a.c
@@ -106,20 +106,12 @@ static struct sk_buff *rtl4a_tag_rcv(struct sk_buff *skb,
 	return skb;
 }
 
-static void rtl4a_tag_flow_dissect(const struct sk_buff *skb, __be16 *proto,
-				   int *offset)
-{
-	*offset = RTL4_A_HDR_LEN;
-	/* Skip past the tag and fetch the encapsulated Ethertype */
-	*proto = ((__be16 *)skb->data)[1];
-}
-
 static const struct dsa_device_ops rtl4a_netdev_ops = {
 	.name	= "rtl4a",
 	.proto	= DSA_TAG_PROTO_RTL4_A,
 	.xmit	= rtl4a_tag_xmit,
 	.rcv	= rtl4a_tag_rcv,
-	.flow_dissect = rtl4a_tag_flow_dissect,
+	.flow_dissect = dsa_tag_generic_flow_dissect,
 	.overhead = RTL4_A_HDR_LEN,
 };
 module_dsa_tag_driver(rtl4a_netdev_ops);
-- 
2.25.1