diff options
Diffstat (limited to 'drivers/tty/n_tty.c')
| -rw-r--r-- | drivers/tty/n_tty.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c index b60b043f47d8..d4b14c30794e 100644 --- a/drivers/tty/n_tty.c +++ b/drivers/tty/n_tty.c @@ -247,6 +247,8 @@ static void n_tty_write_wakeup(struct tty_struct *tty) static void n_tty_check_throttle(struct tty_struct *tty) { + struct n_tty_data *ldata = tty->disc_data; + if (tty->driver->type == TTY_DRIVER_TYPE_PTY) return; /* @@ -254,6 +256,9 @@ static void n_tty_check_throttle(struct tty_struct *tty) * mode. We don't want to throttle the driver if we're in * canonical mode and don't have a newline yet! */ + if (ldata->icanon && ldata->canon_head == ldata->read_tail) + return; + while (1) { int throttled; tty_set_flow_change(tty, TTY_THROTTLE_SAFE); |