diff -pNaru5 trueport-6.10.0.orig/ptyx/ptymod.c trueport-6.10.0/ptyx/ptymod.c
--- trueport-6.10.0.orig/ptyx/ptymod.c	2021-11-20 15:21:35.364409568 -0500
+++ trueport-6.10.0/ptyx/ptymod.c	2021-11-20 15:24:01.845050085 -0500
@@ -284,28 +284,28 @@ static int __init ptyx_init(void)
 		printk("ptyx module input paramater max_installed_ports=%d is invalid \n", max_installed_ports);
 		retval = -EINVAL;
 		goto init_out;
 	}
 	
-	ptyx_master_driver = alloc_tty_driver(max_installed_ports);
-	if (!ptyx_master_driver)
+	ptyx_master_driver = tty_alloc_driver(max_installed_ports,0);
+	if (IS_ERR(ptyx_master_driver))
 	{
 		printk("Couldn't allocate ptyx master driver \n");
 		retval = -ENOMEM;
 		goto init_out;
 	}
 	
-	ptyx_slave_driver = alloc_tty_driver(max_installed_ports);
-	if (!ptyx_slave_driver)
+	ptyx_slave_driver = tty_alloc_driver(max_installed_ports,0);
+	if (IS_ERR(ptyx_slave_driver))
 	{
 		printk("Couldn't allocate ptyx slave driver \n");
 		retval = -ENOMEM;
 		goto init_out;
 	}
 
-	ptyx_control_driver = alloc_tty_driver(max_installed_ports);
-	if (!ptyx_control_driver)
+	ptyx_control_driver = tty_alloc_driver(max_installed_ports,0);
+	if (IS_ERR(ptyx_control_driver))
 	{
 		printk("Couldn't allocate ptyx ctrl status driver \n");
 		retval = -ENOMEM;
 		goto init_out;
 	}
@@ -401,24 +401,24 @@ static int __init ptyx_init(void)
 	ptyx_control_driver->driver_state = pty_state_table;		// global pointer ot private data
 	tty_set_operations(ptyx_control_driver, &ptyx_ops_control);
 
 	if ( (retval = tty_register_driver(ptyx_control_driver)) < 0 )
 	{
- 		put_tty_driver(ptyx_control_driver);
+ 		tty_driver_kref_put(ptyx_control_driver);
 		printk("Couldn't register ptyx control status driver, retval=%d3 \n", retval);
 	}
 
 	if ( (retval = tty_register_driver(ptyx_slave_driver)) < 0 )
 	{
-		put_tty_driver(ptyx_slave_driver);
+		tty_driver_kref_put(ptyx_slave_driver);
 		printk("Couldn't register ptyx slave driver, retval=%d \n", retval);
 		goto init_out;
 	}
 
 	if ( (retval = tty_register_driver(ptyx_master_driver)) < 0 )
 	{
- 		put_tty_driver(ptyx_slave_driver);
+ 		tty_driver_kref_put(ptyx_slave_driver);
 		printk("Couldn't register ptyx master driver, retval=%d \n", retval);
 	}
 
 init_out:
  
@@ -430,17 +430,17 @@ static void __exit ptyx_finish(void)
 	int i;
 	
 	ptyx_print(PTYX_DEBUG_MISC, ("ptyx_finish(): unregistering driver \n"));
 
 	tty_unregister_driver(ptyx_master_driver);
-	put_tty_driver(ptyx_master_driver);
+	tty_driver_kref_put(ptyx_master_driver);
 
 	tty_unregister_driver(ptyx_slave_driver);
-	put_tty_driver(ptyx_slave_driver);
+	tty_driver_kref_put(ptyx_slave_driver);
 
 	tty_unregister_driver(ptyx_control_driver);
-	put_tty_driver(ptyx_control_driver);
+	tty_driver_kref_put(ptyx_control_driver);
 	
 	if (pty_state_table)
 	{
 	 	for (i = 0; i < max_installed_ports; i++)
 		{