diff options
Diffstat (limited to 'drivers/char/pty.c')
| -rw-r--r-- | drivers/char/pty.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/char/pty.c b/drivers/char/pty.c index 706ff34728f..6288356b769 100644 --- a/drivers/char/pty.c +++ b/drivers/char/pty.c @@ -181,6 +181,7 @@ static int pty_set_lock(struct tty_struct *tty, int __user * arg) static void pty_flush_buffer(struct tty_struct *tty) { struct tty_struct *to = tty->link; + unsigned long flags; if (!to) return; @@ -189,8 +190,10 @@ static void pty_flush_buffer(struct tty_struct *tty) to->ldisc.flush_buffer(to); if (to->packet) { + spin_lock_irqsave(&tty->ctrl_lock, flags); tty->ctrl_status |= TIOCPKT_FLUSHWRITE; wake_up_interruptible(&to->read_wait); + spin_unlock_irqrestore(&tty->ctrl_lock, flags); } } |