serial: ioc4_serial: Free memory when kzalloc fails during probe

Inside ioc4_attach_local() 4 memory was allocated using kzalloc and
assign it to ports[] within loop. When kzalloc fails inside loop,
it returns error without freeing previously allocated memory and we
may have memory leak. Fix this by freeing ports[] before return.
Signed-off-by: Souptick joarder <jrdr.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/tty/serial/ioc4_serial.c

@@ -1082,7 +1082,7 @@ static int inline ioc4_attach_local(struct ioc4_driver_data *idd)
 		if (!port) {
 			printk(KERN_WARNING
 				"IOC4 serial memory not available for port\n");
-			return -ENOMEM;
+			goto free;
 		}
 		spin_lock_init(&port->ip_lock);
 
@@ -1190,6 +1190,11 @@ static int inline ioc4_attach_local(struct ioc4_driver_data *idd)
 				handle_dma_error_intr, port);
 	}
 	return 0;
+
+free:
+	while (port_number)
+		kfree(ports[--port_number]);
+	return -ENOMEM;
 }
 
 /**