net/smc: return active RoCE port only

SMC requires an active ib port on the RoCE device.
smc_pnet_find_roce_resource() determines the matching RoCE device port
according to the configured PNET table. Do not return the found
RoCE device port, if it is not flagged active.
Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com>
Reviewed-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/smc/smc_pnet.c

@@ -523,8 +523,11 @@ void smc_pnet_find_roce_resource(struct sock *sk,
 	read_lock(&smc_pnettable.lock);
 	list_for_each_entry(pnetelem, &smc_pnettable.pnetlist, list) {
 		if (dst->dev == pnetelem->ndev) {
-			*smcibdev = pnetelem->smcibdev;
-			*ibport = pnetelem->ib_port;
+			if (smc_ib_port_active(pnetelem->smcibdev,
+					       pnetelem->ib_port)) {
+				*smcibdev = pnetelem->smcibdev;
+				*ibport = pnetelem->ib_port;
+			}
 			break;
 		}
 	}