tty: Bracket ldisc release with TTY_DEBUG_HANGUP messages
Expected typical log output:
[ 2.437211] tty_open: opening pts1...
[ 2.443376] tty_open: opening pts5...
[ 2.447830] tty_release: ptm0 (tty count=1)...
[ 2.447849] pts0 vhangup...
[ 2.447865] tty_release: ptm0: final close
[ 2.447876] tty_release: ptm0: freeing structure...
[ 2.451634] tty_release: tty1 (tty count=1)...
[ 2.451638] tty_release: tty1: final close
[ 2.451654] tty_release: tty1: freeing structure...
[ 2.452505] tty_release: pts5 (tty count=2)...
[ 2.453029] tty_open: opening pts0...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 95e9712..f6ce2c5 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -1836,7 +1836,7 @@
return 0;
#ifdef TTY_DEBUG_HANGUP
- printk(KERN_DEBUG "%s: freeing tty structure...\n", __func__);
+ printk(KERN_DEBUG "%s: %s: final close\n", __func__, tty_name(tty, buf));
#endif
/*
* Ask the line discipline code to release its structures
@@ -1848,6 +1848,9 @@
if (o_tty)
tty_flush_works(o_tty);
+#ifdef TTY_DEBUG_HANGUP
+ printk(KERN_DEBUG "%s: %s: freeing structure...\n", __func__, tty_name(tty, buf));
+#endif
/*
* The release_tty function takes care of the details of clearing
* the slots and preserving the termios structure. The tty_unlock_pair