--- zzzz-none-000/linux-3.10.107/drivers/s390/char/tape_std.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/s390/char/tape_std.c	2021-02-04 17:41:59.000000000 +0000
@@ -78,7 +78,8 @@
 
 	rc = tape_do_io_interruptible(device, request);
 
-	del_timer(&timeout);
+	del_timer_sync(&timeout);
+	destroy_timer_on_stack(&timeout);
 
 	if (rc != 0) {
 		DBF_EVENT(3, "%08x: assign failed - device might be busy\n",