From f13b2b33c7674fa0988dfaa9adb95d7d912b489f Mon Sep 17 00:00:00 2001
From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
Date: Wed, 10 Apr 2024 20:42:38 +0100
Subject: [PATCH 1/2] 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.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/E1rudqA-006K9B-85@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
 include/net/dsa.h |  6 ++++++
 net/dsa/port.c    | 12 ++++++------
 2 files changed, 12 insertions(+), 6 deletions(-)

--- 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,
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -1572,7 +1572,7 @@ 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;
 
@@ -1586,7 +1586,7 @@ static int dsa_port_phylink_mac_prepare(
 					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;
 
@@ -1601,7 +1601,7 @@ static void dsa_port_phylink_mac_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)
@@ -1614,7 +1614,7 @@ static int dsa_port_phylink_mac_finish(s
 				       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;
 
@@ -1629,7 +1629,7 @@ static void dsa_port_phylink_mac_link_do
 					   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;
 
@@ -1652,7 +1652,7 @@ static void dsa_port_phylink_mac_link_up
 					 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) {
