diff options
Diffstat (limited to 'drivers/tty/tty_ldisc.c')
| -rw-r--r-- | drivers/tty/tty_ldisc.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c index e19e1364711..ef925d58171 100644 --- a/drivers/tty/tty_ldisc.c +++ b/drivers/tty/tty_ldisc.c @@ -555,7 +555,7 @@ static void tty_ldisc_flush_works(struct tty_struct *tty) static int tty_ldisc_wait_idle(struct tty_struct *tty) { int ret; - ret = wait_event_interruptible_timeout(tty_ldisc_idle, + ret = wait_event_timeout(tty_ldisc_idle, atomic_read(&tty->ldisc->users) == 1, 5 * HZ); if (ret < 0) return ret; @@ -763,6 +763,8 @@ static int tty_ldisc_reinit(struct tty_struct *tty, int ldisc) if (IS_ERR(ld)) return -1; + WARN_ON_ONCE(tty_ldisc_wait_idle(tty)); + tty_ldisc_close(tty, tty->ldisc); tty_ldisc_put(tty->ldisc); tty->ldisc = NULL; @@ -956,6 +958,19 @@ void tty_ldisc_init(struct tty_struct *tty) tty_ldisc_assign(tty, ld); } +/** + * tty_ldisc_init - ldisc cleanup for new tty + * @tty: tty that was allocated recently + * + * The tty structure must not becompletely set up (tty_ldisc_setup) when + * this call is made. + */ +void tty_ldisc_deinit(struct tty_struct *tty) +{ + put_ldisc(tty->ldisc); + tty_ldisc_assign(tty, NULL); +} + void tty_ldisc_begin(void) { /* Setup the default TTY line discipline. */ |