netdev - [PATCH net-next v2 3/6] net: dsa: enable and disable all ports

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Date:   Mon, 19 Aug 2019 16:00:50 -0400
From:   Vivien Didelot <vivien.didelot@...il.com>
To:     netdev@...r.kernel.org
Cc:     marek.behun@....cz, davem@...emloft.net, f.fainelli@...il.com,
        andrew@...n.ch, Vivien Didelot <vivien.didelot@...il.com>
Subject: [PATCH net-next v2 3/6] net: dsa: enable and disable all ports

Call the .port_enable and .port_disable functions for all ports,
not only the user ports, so that drivers may optimize the power
consumption of all ports after a successful setup.

Unused ports are now disabled on setup. CPU and DSA ports are now
enabled on setup and disabled on teardown. User ports were already
enabled at slave creation and disabled at slave destruction.

Signed-off-by: Vivien Didelot <vivien.didelot@...il.com>
Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
---
 net/dsa/dsa2.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index 405552ac4c08..8c4eccb0cfe6 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -264,6 +264,7 @@ static int dsa_port_setup(struct dsa_port *dp)
 
 	switch (dp->type) {
 	case DSA_PORT_TYPE_UNUSED:
+		dsa_port_disable(dp);
 		break;
 	case DSA_PORT_TYPE_CPU:
 		memset(dlp, 0, sizeof(*dlp));
@@ -274,6 +275,10 @@ static int dsa_port_setup(struct dsa_port *dp)
 			return err;
 
 		err = dsa_port_link_register_of(dp);
+		if (err)
+			return err;
+
+		err = dsa_port_enable(dp, NULL);
 		if (err)
 			return err;
 		break;
@@ -286,6 +291,10 @@ static int dsa_port_setup(struct dsa_port *dp)
 			return err;
 
 		err = dsa_port_link_register_of(dp);
+		if (err)
+			return err;
+
+		err = dsa_port_enable(dp, NULL);
 		if (err)
 			return err;
 		break;
@@ -317,11 +326,13 @@ static void dsa_port_teardown(struct dsa_port *dp)
 	case DSA_PORT_TYPE_UNUSED:
 		break;
 	case DSA_PORT_TYPE_CPU:
+		dsa_port_disable(dp);
 		dsa_tag_driver_put(dp->tag_ops);
 		devlink_port_unregister(dlp);
 		dsa_port_link_unregister_of(dp);
 		break;
 	case DSA_PORT_TYPE_DSA:
+		dsa_port_disable(dp);
 		devlink_port_unregister(dlp);
 		dsa_port_link_unregister_of(dp);
 		break;
-- 
2.22.0