diff options
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index bdc543caf069..5a78f6940760 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2748,12 +2748,15 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) { struct tty_port *port = &uport->state->port; struct tty_struct *tty = port->tty; - struct tty_ldisc *ld = tty ? tty_ldisc_ref(tty) : NULL; + struct tty_ldisc *ld; - if (ld) { - if (ld->ops->dcd_change) - ld->ops->dcd_change(tty, status); - tty_ldisc_deref(ld); + if (tty) { + ld = tty_ldisc_ref(tty); + if (ld) { + if (ld->ops->dcd_change) + ld->ops->dcd_change(tty, status); + tty_ldisc_deref(ld); + } } uport->icount.dcd++; |