netdev - [PATCH net-next 2/9] devlink: update the code in netns move to latest helpers

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Date:   Thu,  5 Jan 2023 22:33:55 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, edumazet@...gle.com, pabeni@...hat.com,
        jacob.e.keller@...el.com, jiri@...nulli.us,
        Jakub Kicinski <kuba@...nel.org>, Jiri Pirko <jiri@...dia.com>
Subject: [PATCH net-next 2/9] devlink: update the code in netns move to latest helpers

devlink_pernet_pre_exit() is the only obvious place which takes
the instance lock without using the devl_ helpers. Update the code
and move the error print after releasing the reference
(having unlock and put together feels slightly idiomatic).

Reviewed-by: Jiri Pirko <jiri@...dia.com>
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 net/devlink/core.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/net/devlink/core.c b/net/devlink/core.c
index 88c88b8053e2..d3b8336946fd 100644
--- a/net/devlink/core.c
+++ b/net/devlink/core.c
@@ -299,15 +299,16 @@ static void __net_exit devlink_pernet_pre_exit(struct net *net)
 	 */
 	devlinks_xa_for_each_registered_get(net, index, devlink) {
 		WARN_ON(!(devlink->features & DEVLINK_F_RELOAD));
-		mutex_lock(&devlink->lock);
+		devl_lock(devlink);
 		err = devlink_reload(devlink, &init_net,
 				     DEVLINK_RELOAD_ACTION_DRIVER_REINIT,
 				     DEVLINK_RELOAD_LIMIT_UNSPEC,
 				     &actions_performed, NULL);
-		mutex_unlock(&devlink->lock);
+		devl_unlock(devlink);
+		devlink_put(devlink);
+
 		if (err && err != -EOPNOTSUPP)
 			pr_warn("Failed to reload devlink instance into init_net\n");
-		devlink_put(devlink);
 	}
 }
 
-- 
2.38.1