[SCSI] libfc: have rport_create do a lookup for pre-existing rports first

For future discovery patches, change rport_create to return a previously
created rport_priv that has the FC_ID as long as it isn't in deleted state.
Signed-off-by: Joe Eykholt <jeykholt@cisco.com>
Signed-off-by: Robert Love <robert.w.love@intel.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

drivers/scsi/libfc/fc_disc.c

@@ -377,12 +377,9 @@ static int fc_disc_new_target(struct fc_disc *disc,
 	    ids->port_id != fc_host_port_id(lport->host) &&
 	    ids->port_name != lport->wwpn) {
 		if (!rdata) {
-			rdata = lport->tt.rport_lookup(lport, ids->port_id);
-			if (!rdata) {
-				rdata = lport->tt.rport_create(lport, ids);
-				if (!rdata)
-					error = -ENOMEM;
-			}
+			rdata = lport->tt.rport_create(lport, ids);
+			if (!rdata)
+				error = -ENOMEM;
 		}
 		if (rdata) {
 			rdata->ops = &fc_disc_rport_ops;

drivers/scsi/libfc/fc_rport.c

@@ -98,6 +98,10 @@ static struct fc_rport_priv *fc_rport_create(struct fc_lport *lport,
 {
 	struct fc_rport_priv *rdata;
 
+	rdata = lport->tt.rport_lookup(lport, ids->port_id);
+	if (rdata)
+		return rdata;
+
 	rdata = kzalloc(sizeof(*rdata), GFP_KERNEL);
 	if (!rdata)
 		return NULL;