diff options
Diffstat (limited to 'sys/dev/uart/uart_tty.c')
| -rw-r--r-- | sys/dev/uart/uart_tty.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/dev/uart/uart_tty.c b/sys/dev/uart/uart_tty.c index ada4927..6b526ae 100644 --- a/sys/dev/uart/uart_tty.c +++ b/sys/dev/uart/uart_tty.c @@ -355,6 +355,18 @@ uart_tty_free(void *arg) */ } +static bool +uart_tty_busy(struct tty *tp) +{ + struct uart_softc *sc; + + sc = tty_softc(tp); + if (sc == NULL || sc->sc_leaving) + return (FALSE); + + return (sc->sc_txbusy); +} + static struct ttydevsw uart_tty_class = { .tsw_flags = TF_INITLOCK|TF_CALLOUT, .tsw_open = uart_tty_open, @@ -365,6 +377,7 @@ static struct ttydevsw uart_tty_class = { .tsw_param = uart_tty_param, .tsw_modem = uart_tty_modem, .tsw_free = uart_tty_free, + .tsw_busy = uart_tty_busy, }; int |
