RDS: fix rds_tcp_init() error path
If register_pernet_subsys() fails, we shouldn't try to call unregister_pernet_subsys(). Fixes: 467fa153 ("RDS-TCP: Support multiple RDS-TCP listen endpoints, one per netns.") Cc: stable@vger.kernel.org Cc: Sowmini Varadhan <sowmini.varadhan@oracle.com> Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Acked-by: Sowmini Varadhan <sowmini.varadhan@oracle.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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