scsi: storvsc: missing error code in storvsc_probe()

We should set the error code if fc_remote_port_add() fails.

Cc: <stable@vger.kernel.org> #v4.12+
Fixes: daf0cd445a ("scsi: storvsc: Add support for FC rport.")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Cathy Avery <cavery@redhat.com>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/storvsc_drv.c

@@ -1833,8 +1833,10 @@ static int storvsc_probe(struct hv_device *device,
 		fc_host_node_name(host) = stor_device->node_name;
 		fc_host_port_name(host) = stor_device->port_name;
 		stor_device->rport = fc_remote_port_add(host, 0, &ids);
-		if (!stor_device->rport)
+		if (!stor_device->rport) {
+			ret = -ENOMEM;
 			goto err_out4;
+		}
 	}
 #endif
 	return 0;