diff options
Diffstat (limited to 'drivers/tty')
-rw-r--r-- | drivers/tty/pty.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index 6c7151edd715..b0e2c4847a5d 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -110,16 +110,19 @@ static void pty_unthrottle(struct tty_struct *tty) static int pty_write(struct tty_struct *tty, const unsigned char *buf, int c) { struct tty_struct *to = tty->link; + unsigned long flags; if (tty->stopped) return 0; if (c > 0) { + spin_lock_irqsave(&to->port->lock, flags); /* Stuff the data into the input queue of the other end */ c = tty_insert_flip_string(to->port, buf, c); /* And shovel */ if (c) tty_flip_buffer_push(to->port); + spin_unlock_irqrestore(&to->port->lock, flags); } return c; } |