--- nslink.c.orig	2020-10-29 11:49:44.000000000 -0400
+++ nslink.c	2021-08-10 16:35:56.677430829 -0400
@@ -5671,11 +5671,11 @@ int nrp_init(void)
         return 0;
 }
 
 static void nrp_cleanup_module(void)
 {
-        int retval, i;
+        int i;
 	printk(KERN_INFO "nslink: starting driver module shutdown\n");
 
         remove_proc_entry("driver/nslink/status",0);
         remove_proc_entry("driver/nslink/hdlc",0);
         remove_proc_entry("driver/nslink/ports",0);
@@ -5697,14 +5697,12 @@ static void nrp_cleanup_module(void)
 
         for (i = 0; i < numBoxes; i++)
                 free_si_box(i);
 
         if (driver_registered) {
-                retval = tty_unregister_driver(nslink_driver);
+                tty_unregister_driver(nslink_driver);
                 put_tty_driver(nslink_driver);
-                if (retval)
-                        printk(KERN_INFO "nslink: Error %d while trying to unregister Nslink driver\n", -retval);
         }
 
 	printk(KERN_INFO "nslink: finished driver module shutdown\n");
         return;
 }