diff options
Diffstat (limited to 'drivers/char/tty_ldisc.c')
| -rw-r--r-- | drivers/char/tty_ldisc.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/char/tty_ldisc.c b/drivers/char/tty_ldisc.c index 39c8f86dedd4..a19e935847b0 100644 --- a/drivers/char/tty_ldisc.c +++ b/drivers/char/tty_ldisc.c @@ -148,8 +148,10 @@ static struct tty_ldisc *tty_ldisc_try_get(int disc) } } spin_unlock_irqrestore(&tty_ldisc_lock, flags); - if (err) + if (err) { + kfree(ld); return ERR_PTR(err); + } return ld; } @@ -205,6 +207,7 @@ static void tty_ldisc_put(struct tty_ldisc *ld) ldo->refcount--; module_put(ldo->owner); spin_unlock_irqrestore(&tty_ldisc_lock, flags); + WARN_ON(ld->refcount); kfree(ld); } @@ -262,7 +265,7 @@ const struct file_operations tty_ldiscs_proc_fops = { * @ld: line discipline * * Install an instance of a line discipline into a tty structure. The - * ldisc must have a reference count above zero to ensure it remains/ + * ldisc must have a reference count above zero to ensure it remains. * The tty instance refcount starts at zero. * * Locking: @@ -791,6 +794,8 @@ void tty_ldisc_hangup(struct tty_struct *tty) /* Avoid racing set_ldisc */ mutex_lock(&tty->ldisc_mutex); /* Switch back to N_TTY */ + tty_ldisc_halt(tty); + tty_ldisc_wait_idle(tty); tty_ldisc_reinit(tty); /* At this point we have a closed ldisc and we want to reopen it. We could defer this to the next open but |