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net: macvlan: check register_netdevice_notifier() error in macvlan_init_module()

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macvlan_init_module() ignores register_netdevice_notifier() errors and
continues module initialization, which can leave macvlan loaded without
its netdev notifier registered.

Check the error and fail module initialization early.

This is a future looking check, register_netdevice_notifier()
only fails on double registration or if the registered notifier
itself returns an error.

Signed-off-by: Minhong He <heminhong@kylinos.cn>
Link: https://patch.msgid.link/20260803085950.142325-1-heminhong@kylinos.cn
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Minhong He 2026-08-03 16:59:50 +08:00 committed by Jakub Kicinski
parent c1293e4a34
commit 82167f2f0f
1 changed files with 3 additions and 1 deletions
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4
drivers/net/macvlan.c
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@ -1915,7 +1915,9 @@ static int __init macvlan_init_module(void)
{
int err;
register_netdevice_notifier(&macvlan_notifier_block);
err = register_netdevice_notifier(&macvlan_notifier_block);
if (err)
return err;
err = macvlan_link_register(&macvlan_link_ops);
if (err < 0)