netdev - [PATCH RFC net-next 1/3] net: dsa: introduce dsa_phylink_to

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Message-Id: <E1rs1Rj-005g7M-Ul@rmk-PC.armlinux.org.uk>
Date: Wed, 03 Apr 2024 15:18:35 +0100
From: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To: Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Jakub Kicinski <kuba@...nel.org>,
	netdev@...r.kernel.org,
	Paolo Abeni <pabeni@...hat.com>
Subject: [PATCH RFC net-next 1/3] net: dsa: introduce dsa_phylink_to_port()

We convert from a phylink_config struct to a dsa_port struct in many
places, let's provide a helper for this.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 include/net/dsa.h |  6 ++++++
 net/dsa/port.c    | 12 ++++++------
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 7c0da9effe4e..f228b479a5fd 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -327,6 +327,12 @@ struct dsa_port {
 	};
 };
 
+static inline struct dsa_port *
+dsa_phylink_to_port(struct phylink_config *config)
+{
+	return container_of(config, struct dsa_port, pl_config);
+}
+
 /* TODO: ideally DSA ports would have a single dp->link_dp member,
  * and no dst->rtable nor this struct dsa_link would be needed,
  * but this would require some more complex tree walking,
diff --git a/net/dsa/port.c b/net/dsa/port.c
index c42dac87671b..02bf1c306bdc 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -1558,7 +1558,7 @@ static struct phylink_pcs *
 dsa_port_phylink_mac_select_pcs(struct phylink_config *config,
 				phy_interface_t interface)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct phylink_pcs *pcs = ERR_PTR(-EOPNOTSUPP);
 	struct dsa_switch *ds = dp->ds;
 
@@ -1572,7 +1572,7 @@ static int dsa_port_phylink_mac_prepare(struct phylink_config *config,
 					unsigned int mode,
 					phy_interface_t interface)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct dsa_switch *ds = dp->ds;
 	int err = 0;
 
@@ -1587,7 +1587,7 @@ static void dsa_port_phylink_mac_config(struct phylink_config *config,
 					unsigned int mode,
 					const struct phylink_link_state *state)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct dsa_switch *ds = dp->ds;
 
 	if (!ds->ops->phylink_mac_config)
@@ -1600,7 +1600,7 @@ static int dsa_port_phylink_mac_finish(struct phylink_config *config,
 				       unsigned int mode,
 				       phy_interface_t interface)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct dsa_switch *ds = dp->ds;
 	int err = 0;
 
@@ -1615,7 +1615,7 @@ static void dsa_port_phylink_mac_link_down(struct phylink_config *config,
 					   unsigned int mode,
 					   phy_interface_t interface)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct phy_device *phydev = NULL;
 	struct dsa_switch *ds = dp->ds;
 
@@ -1638,7 +1638,7 @@ static void dsa_port_phylink_mac_link_up(struct phylink_config *config,
 					 int speed, int duplex,
 					 bool tx_pause, bool rx_pause)
 {
-	struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
+	struct dsa_port *dp = dsa_phylink_to_port(config);
 	struct dsa_switch *ds = dp->ds;
 
 	if (!ds->ops->phylink_mac_link_up) {
-- 
2.30.2