linux-kernel - [PATCH net-next v1 07/21] octeontx2: Move devlink registration to be last devlink command

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Date:   Sat, 25 Sep 2021 14:22:47 +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>,
        Sergey Ryazanov <ryazanov.s.a@...il.com>,
        Shannon Nelson <snelson@...sando.io>,
        Simon Horman <simon.horman@...igine.com>,
        Subbaraya Sundeep <sbhatta@...vell.com>,
        Sunil Goutham <sgoutham@...vell.com>,
        Taras Chornyi <tchornyi@...vell.com>,
        Tariq Toukan <tariqt@...dia.com>,
        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 07/21] octeontx2: 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. This change allows us to delete call to devlink_params_publish()
and impossible check during unregister flow.

Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 .../ethernet/marvell/octeontx2/af/rvu_devlink.c   | 10 ++--------
 .../ethernet/marvell/octeontx2/nic/otx2_devlink.c | 15 +++------------
 2 files changed, 5 insertions(+), 20 deletions(-)

diff --git a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
index de9562acd04b..70bacd38a6d9 100644
--- a/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
+++ b/drivers/net/ethernet/marvell/octeontx2/af/rvu_devlink.c
@@ -1510,7 +1510,6 @@ int rvu_register_dl(struct rvu *rvu)
 		return -ENOMEM;
 	}
 
-	devlink_register(dl);
 	rvu_dl = devlink_priv(dl);
 	rvu_dl->dl = dl;
 	rvu_dl->rvu = rvu;
@@ -1531,13 +1530,11 @@ int rvu_register_dl(struct rvu *rvu)
 		goto err_dl_health;
 	}
 
-	devlink_params_publish(dl);
-
+	devlink_register(dl);
 	return 0;
 
 err_dl_health:
 	rvu_health_reporters_destroy(rvu);
-	devlink_unregister(dl);
 	devlink_free(dl);
 	return err;
 }
@@ -1547,12 +1544,9 @@ void rvu_unregister_dl(struct rvu *rvu)
 	struct rvu_devlink *rvu_dl = rvu->rvu_dl;
 	struct devlink *dl = rvu_dl->dl;
 
-	if (!dl)
-		return;
-
+	devlink_unregister(dl);
 	devlink_params_unregister(dl, rvu_af_dl_params,
 				  ARRAY_SIZE(rvu_af_dl_params));
 	rvu_health_reporters_destroy(rvu);
-	devlink_unregister(dl);
 	devlink_free(dl);
 }
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
index 3de18f9433ae..777a27047c8e 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_devlink.c
@@ -108,7 +108,6 @@ int otx2_register_dl(struct otx2_nic *pfvf)
 		return -ENOMEM;
 	}
 
-	devlink_register(dl);
 	otx2_dl = devlink_priv(dl);
 	otx2_dl->dl = dl;
 	otx2_dl->pfvf = pfvf;
@@ -122,12 +121,10 @@ int otx2_register_dl(struct otx2_nic *pfvf)
 		goto err_dl;
 	}
 
-	devlink_params_publish(dl);
-
+	devlink_register(dl);
 	return 0;
 
 err_dl:
-	devlink_unregister(dl);
 	devlink_free(dl);
 	return err;
 }
@@ -135,16 +132,10 @@ int otx2_register_dl(struct otx2_nic *pfvf)
 void otx2_unregister_dl(struct otx2_nic *pfvf)
 {
 	struct otx2_devlink *otx2_dl = pfvf->dl;
-	struct devlink *dl;
-
-	if (!otx2_dl || !otx2_dl->dl)
-		return;
-
-	dl = otx2_dl->dl;
+	struct devlink *dl = otx2_dl->dl;
 
+	devlink_unregister(dl);
 	devlink_params_unregister(dl, otx2_dl_params,
 				  ARRAY_SIZE(otx2_dl_params));
-
-	devlink_unregister(dl);
 	devlink_free(dl);
 }
-- 
2.31.1