TTY: ldisc, do not close until there are readers

[pandora-kernel.git] / drivers / tty / tty_ldisc.c

diff --git a/drivers/tty/tty_ldisc.c b/drivers/tty/tty_ldisc.c
index 5d01d32..ef925d5 100644 (file)
--- 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;