diff options
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 94ac6c6e8fb8..51a58c367953 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -143,6 +143,9 @@ static void uart_start(struct tty_struct *tty) struct uart_port *port; unsigned long flags; + if (!state) + return; + port = uart_port_lock(state, flags); __uart_start(tty); uart_port_unlock(port, flags); @@ -2415,6 +2418,9 @@ static void uart_poll_put_char(struct tty_driver *driver, int line, char ch) struct uart_state *state = drv->state + line; struct uart_port *port; + if (!state) + return; + port = uart_port_ref(state); if (!port) return; |