linux-kernel - [PATCH net-next 2/8] net: dsa: directly fetch switch in lan9303

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Message-Id: <20170929183635.8122-3-vivien.didelot@savoirfairelinux.com>
Date:   Fri, 29 Sep 2017 14:36:29 -0400
From:   Vivien Didelot <vivien.didelot@...oirfairelinux.com>
To:     netdev@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel@...oirfairelinux.com,
        "David S. Miller" <davem@...emloft.net>,
        Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Subject: [PATCH net-next 2/8] net: dsa: directly fetch switch in lan9303_rcv

In a single-chip switch fabric, there is no need to fetch the dsa_switch
structure from the tree, directly use the CPU port's "ds" member.

Signed-off-by: Vivien Didelot <vivien.didelot@...oirfairelinux.com>
---
 net/dsa/tag_lan9303.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/net/dsa/tag_lan9303.c b/net/dsa/tag_lan9303.c
index 0b9826105e42..f0b51acf36ac 100644
--- a/net/dsa/tag_lan9303.c
+++ b/net/dsa/tag_lan9303.c
@@ -72,11 +72,10 @@ static struct sk_buff *lan9303_rcv(struct sk_buff *skb, struct net_device *dev,
 {
 	u16 *lan9303_tag;
 	struct dsa_switch_tree *dst = dev->dsa_ptr;
-	struct dsa_switch *ds;
+	struct dsa_port *cpu_dp = dst->cpu_dp;
+	struct dsa_switch *ds = cpu_dp->ds;
 	unsigned int source_port;
 
-	ds = dst->ds[0];
-
 	if (unlikely(!ds)) {
 		dev_warn_ratelimited(&dev->dev, "Dropping packet, due to missing DSA switch device\n");
 		return NULL;
-- 
2.14.1