net/smc: Fix cleanup when register ULP fails

This patch calls smc_ib_unregister_client() when tcp_register_ulp()
fails, and make sure to clean it up.

Fixes: d7cd421 ("net/smc: Introduce TCP ULP support")
Signed-off-by: Tony Lu <tonylu@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Author: tonyluj

net/smc/af_smc.c

@@ -3087,12 +3087,14 @@ static int __init smc_init(void)
 	rc = tcp_register_ulp(&smc_ulp_ops);
 	if (rc) {
 		pr_err("%s: tcp_ulp_register fails with %d\n", __func__, rc);
-		goto out_sock;
+		goto out_ib;
 	}
 
 	static_branch_enable(&tcp_have_smc);
 	return 0;
 
+out_ib:
+	smc_ib_unregister_client();
 out_sock:
 	sock_unregister(PF_SMC);
 out_proto6: