netdev - [PATCH RFC net-next 2/3] net: dsa: add port_setup/port

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Date:   Fri, 16 Aug 2019 17:08:33 +0200
From:   Marek Behún <marek.behun@....cz>
To:     netdev@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <olteanv@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Marek Behún <marek.behun@....cz>
Subject: [PATCH RFC net-next 2/3] net: dsa: add port_setup/port_teardown methods to DSA ops

Add two new methods into the DSA operations structure:
  - port_setup(), called from dsa_port_setup() after the DSA port
    already registered
  - port_teardown(), called from dsa_port_teardown() before the port is
    unregistered

Signed-off-by: Marek Behún <marek.behun@....cz>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Florian Fainelli <f.fainelli@...il.com>
Cc: Vladimir Oltean <olteanv@...il.com>
Cc: Vivien Didelot <vivien.didelot@...il.com>
---
 include/net/dsa.h |  2 ++
 net/dsa/dsa2.c    | 10 +++++++++-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/net/dsa.h b/include/net/dsa.h
index 147b757ef8ea..848898e5d7c5 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -360,6 +360,8 @@ struct dsa_switch_ops {
 
 	int	(*setup)(struct dsa_switch *ds);
 	void	(*teardown)(struct dsa_switch *ds);
+	int	(*port_setup)(struct dsa_switch *ds, int port);
+	void	(*port_teardown)(struct dsa_switch *ds, int port);
 	u32	(*get_phy_flags)(struct dsa_switch *ds, int port);
 
 	/*
diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 3abd173ebacb..c891300a6d2c 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -315,6 +315,9 @@ static int dsa_port_setup(struct dsa_port *dp)
 		break;
 	}
 
+	if (!err && ds->ops->port_setup)
+		err = ds->ops->port_setup(ds, dp->index);
+
 	if (err)
 		devlink_port_unregister(&dp->devlink_port);
 
@@ -323,8 +326,13 @@ static int dsa_port_setup(struct dsa_port *dp)
 
 static void dsa_port_teardown(struct dsa_port *dp)
 {
-	if (dp->type != DSA_PORT_TYPE_UNUSED)
+	struct dsa_switch *ds = dp->ds;
+
+	if (dp->type != DSA_PORT_TYPE_UNUSED) {
 		devlink_port_unregister(&dp->devlink_port);
+		if (ds->ops->port_teardown)
+			ds->ops->port_teardown(ds, dp->index);
+	}
 
 	switch (dp->type) {
 	case DSA_PORT_TYPE_UNUSED:
-- 
2.21.0