--- zzzz-none-000/linux-3.10.107/drivers/tty/ipwireless/tty.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/tty/ipwireless/tty.c	2021-02-04 17:41:59.000000000 +0000
@@ -15,7 +15,6 @@
  *   Copyright (C) 2007 David Sterba
  */
 
-#include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/mutex.h>
@@ -94,11 +93,6 @@
 		return -ENODEV;
 
 	mutex_lock(&tty->ipw_tty_mutex);
-
-	if (tty->closing) {
-		mutex_unlock(&tty->ipw_tty_mutex);
-		return -ENODEV;
-	}
 	if (tty->port.count == 0)
 		tty->tx_bytes_queued = 0;
 
@@ -177,9 +171,6 @@
 				": %d chars not inserted to flip buffer!\n",
 				length - work);
 
-	/*
-	 * This may sleep if ->low_latency is set
-	 */
 	if (work)
 		tty_flip_buffer_push(&tty->port);
 }