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tun/tap: Add the missed return value check of register_netdevice_notifier

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There is some codes of tun/tap module which did not check the return
value of register_netdevice_notifier. Add the check now.

Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tonghao Zhang 2017-07-20 02:41:34 -07:00 committed by David S. Miller
parent 6c7fce6fa8
commit 5edfbd3c06
1 changed files with 9 additions and 1 deletions
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10
drivers/net/tun.c
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@ -2598,8 +2598,16 @@ static int __init tun_init(void)
goto err_misc;
}
register_netdevice_notifier(&tun_notifier_block);
ret = register_netdevice_notifier(&tun_notifier_block);
if (ret) {
pr_err("Can't register netdevice notifier\n");
goto err_notifier;
}
return 0;
err_notifier:
misc_deregister(&tun_miscdev);
err_misc:
rtnl_link_unregister(&tun_link_ops);
err_linkops: