netdev - [PATCH net-next v1 18/21] net: wwan: iosm: Move devlink

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Date:   Sat, 25 Sep 2021 14:22:58 +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 18/21] net: wwan: iosm: Move devlink_register to be last devlink command

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

This change prevents from users to access device before devlink is
fully configured. Indirectly this change fixes the commit mentioned
below where devlink_unregister() was prematurely removed.

Fixes: db4278c55fa5 ("devlink: Make devlink_register to be void")
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 drivers/net/wwan/iosm/iosm_ipc_devlink.c | 7 ++-----
 1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/net/wwan/iosm/iosm_ipc_devlink.c b/drivers/net/wwan/iosm/iosm_ipc_devlink.c
index 42dbe7fe663c..6fe56f73011b 100644
--- a/drivers/net/wwan/iosm/iosm_ipc_devlink.c
+++ b/drivers/net/wwan/iosm/iosm_ipc_devlink.c
@@ -305,7 +305,6 @@ struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
 	ipc_devlink->devlink_ctx = devlink_ctx;
 	ipc_devlink->pcie = ipc_imem->pcie;
 	ipc_devlink->dev = ipc_imem->dev;
-	devlink_register(devlink_ctx);
 
 	rc = devlink_params_register(devlink_ctx, iosm_devlink_params,
 				     ARRAY_SIZE(iosm_devlink_params));
@@ -315,7 +314,6 @@ struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
 		goto param_reg_fail;
 	}
 
-	devlink_params_publish(devlink_ctx);
 	ipc_devlink->cd_file_info = list;
 
 	rc = ipc_devlink_create_region(ipc_devlink);
@@ -334,6 +332,7 @@ struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
 	init_completion(&ipc_devlink->devlink_sio.read_sem);
 	skb_queue_head_init(&ipc_devlink->devlink_sio.rx_list);
 
+	devlink_register(devlink_ctx);
 	dev_dbg(ipc_devlink->dev, "iosm devlink register success");
 
 	return ipc_devlink;
@@ -341,7 +340,6 @@ struct iosm_devlink *ipc_devlink_init(struct iosm_imem *ipc_imem)
 chnl_get_fail:
 	ipc_devlink_destroy_region(ipc_devlink);
 region_create_fail:
-	devlink_params_unpublish(devlink_ctx);
 	devlink_params_unregister(devlink_ctx, iosm_devlink_params,
 				  ARRAY_SIZE(iosm_devlink_params));
 param_reg_fail:
@@ -358,8 +356,8 @@ void ipc_devlink_deinit(struct iosm_devlink *ipc_devlink)
 {
 	struct devlink *devlink_ctx = ipc_devlink->devlink_ctx;
 
+	devlink_unregister(devlink_ctx);
 	ipc_devlink_destroy_region(ipc_devlink);
-	devlink_params_unpublish(devlink_ctx);
 	devlink_params_unregister(devlink_ctx, iosm_devlink_params,
 				  ARRAY_SIZE(iosm_devlink_params));
 	if (ipc_devlink->devlink_sio.devlink_read_pend) {
@@ -370,6 +368,5 @@ void ipc_devlink_deinit(struct iosm_devlink *ipc_devlink)
 		skb_queue_purge(&ipc_devlink->devlink_sio.rx_list);
 
 	ipc_imem_sys_devlink_close(ipc_devlink);
-	devlink_unregister(devlink_ctx);
 	devlink_free(devlink_ctx);
 }
-- 
2.31.1