linux-kernel - [PATCH net-next v1 21/21] net: dsa: Move devlink registration to be last devlink command

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Message-Id: <66dd7979b44ac307711c382054f428f9287666a8.1632565508.git.leonro@nvidia.com>
Date:   Sat, 25 Sep 2021 14:23:01 +0300
From:   Leon Romanovsky <leon@...nel.org>
To:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     Leon Romanovsky <leonro@...dia.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>, Ariel Elior <aelior@...vell.com>,
        Bin Luo <luobin9@...wei.com>,
        Claudiu Manoil <claudiu.manoil@....com>,
        Coiby Xu <coiby.xu@...il.com>,
        Derek Chickles <dchickles@...vell.com>, drivers@...sando.io,
        Felix Manlunas <fmanlunas@...vell.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Geetha sowjanya <gakula@...vell.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        GR-everest-linux-l2@...vell.com, GR-Linux-NIC-Dev@...vell.com,
        hariprasad <hkelam@...vell.com>,
        Ido Schimmel <idosch@...dia.com>,
        Intel Corporation <linuxwwan@...el.com>,
        intel-wired-lan@...ts.osuosl.org,
        Ioana Ciornei <ioana.ciornei@....com>,
        Jerin Jacob <jerinj@...vell.com>,
        Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Jiri Pirko <jiri@...dia.com>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Linu Cherian <lcherian@...vell.com>,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        linux-rdma@...r.kernel.org, linux-staging@...ts.linux.dev,
        Loic Poulain <loic.poulain@...aro.org>,
        Manish Chopra <manishc@...vell.com>,
        M Chetan Kumar <m.chetan.kumar@...el.com>,
        Michael Chan <michael.chan@...adcom.com>,
        Michael Guralnik <michaelgur@...lanox.com>,
        netdev@...r.kernel.org, oss-drivers@...igine.com,
        Richard Cochran <richardcochran@...il.com>,
        Saeed Mahameed <saeedm@...dia.com>,
        Satanand Burla <sburla@...vell.com>,
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        Taras Chornyi <tchornyi@...vell.com>,
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        Tony Nguyen <anthony.l.nguyen@...el.com>,
        UNGLinuxDriver@...rochip.com, Vadym Kochan <vkochan@...vell.com>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <vladimir.oltean@....com>
Subject: [PATCH net-next v1 21/21] net: dsa: Move devlink registration to be last devlink command

From: Leon Romanovsky <leonro@...dia.com>

This change prevents from users to access device before devlink
is fully configured.

Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 net/dsa/dsa2.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c
index a020339e1973..8ca6a1170c9d 100644
--- a/net/dsa/dsa2.c
+++ b/net/dsa/dsa2.c
@@ -848,7 +848,6 @@ static int dsa_switch_setup(struct dsa_switch *ds)
 	dl_priv = devlink_priv(ds->devlink);
 	dl_priv->ds = ds;
 
-	devlink_register(ds->devlink);
 	/* Setup devlink port instances now, so that the switch
 	 * setup() can register regions etc, against the ports
 	 */
@@ -874,8 +873,6 @@ static int dsa_switch_setup(struct dsa_switch *ds)
 	if (err)
 		goto teardown;
 
-	devlink_params_publish(ds->devlink);
-
 	if (!ds->slave_mii_bus && ds->ops->phy_read) {
 		ds->slave_mii_bus = mdiobus_alloc();
 		if (!ds->slave_mii_bus) {
@@ -891,7 +888,7 @@ static int dsa_switch_setup(struct dsa_switch *ds)
 	}
 
 	ds->setup = true;
-
+	devlink_register(ds->devlink);
 	return 0;
 
 free_slave_mii_bus:
@@ -906,7 +903,6 @@ static int dsa_switch_setup(struct dsa_switch *ds)
 	list_for_each_entry(dp, &ds->dst->ports, list)
 		if (dp->ds == ds)
 			dsa_port_devlink_teardown(dp);
-	devlink_unregister(ds->devlink);
 	devlink_free(ds->devlink);
 	ds->devlink = NULL;
 	return err;
@@ -919,6 +915,9 @@ static void dsa_switch_teardown(struct dsa_switch *ds)
 	if (!ds->setup)
 		return;
 
+	if (ds->devlink)
+		devlink_unregister(ds->devlink);
+
 	if (ds->slave_mii_bus && ds->ops->phy_read) {
 		mdiobus_unregister(ds->slave_mii_bus);
 		mdiobus_free(ds->slave_mii_bus);
@@ -934,7 +933,6 @@ static void dsa_switch_teardown(struct dsa_switch *ds)
 		list_for_each_entry(dp, &ds->dst->ports, list)
 			if (dp->ds == ds)
 				dsa_port_devlink_teardown(dp);
-		devlink_unregister(ds->devlink);
 		devlink_free(ds->devlink);
 		ds->devlink = NULL;
 	}
-- 
2.31.1