tun/tap: Add the missed return value check of register_netdevice_notifier
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>
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@ -2598,8 +2598,16 @@ static int __init tun_init(void)
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goto err_misc;
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goto err_misc;
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}
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}
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register_netdevice_notifier(&tun_notifier_block);
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ret = register_netdevice_notifier(&tun_notifier_block);
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if (ret) {
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pr_err("Can't register netdevice notifier\n");
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goto err_notifier;
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}
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return 0;
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return 0;
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err_notifier:
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misc_deregister(&tun_miscdev);
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err_misc:
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err_misc:
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rtnl_link_unregister(&tun_link_ops);
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rtnl_link_unregister(&tun_link_ops);
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err_linkops:
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err_linkops:
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