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    Subject[PATCH v4 17/32] tty: Bracket ldisc release with TTY_DEBUG_HANGUP messages
    Date
    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>
    ---
    drivers/tty/tty_io.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
    index f1303da..cfcd849 100644
    --- a/drivers/tty/tty_io.c
    +++ b/drivers/tty/tty_io.c
    @@ -1790,7 +1790,7 @@ int tty_release(struct inode *inode, struct file *filp)
    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
    @@ -1802,6 +1802,9 @@ int tty_release(struct inode *inode, struct file *filp)
    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
    --
    1.8.1.2


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