diff options
Diffstat (limited to 'drivers/serial/serial_core.c')
| -rw-r--r-- | drivers/serial/serial_core.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/serial/serial_core.c b/drivers/serial/serial_core.c index 1689bda1d13..dcc72444e8e 100644 --- a/drivers/serial/serial_core.c +++ b/drivers/serial/serial_core.c @@ -1270,6 +1270,9 @@ static void uart_close(struct tty_struct *tty, struct file *filp) BUG_ON(!kernel_locked()); + if (!state) + return; + uport = state->uart_port; port = &state->port; @@ -1316,9 +1319,9 @@ static void uart_close(struct tty_struct *tty, struct file *filp) */ if (port->flags & ASYNC_INITIALIZED) { unsigned long flags; - spin_lock_irqsave(&port->lock, flags); + spin_lock_irqsave(&uport->lock, flags); uport->ops->stop_rx(uport); - spin_unlock_irqrestore(&port->lock, flags); + spin_unlock_irqrestore(&uport->lock, flags); /* * Before we drop DTR, make sure the UART transmitter * has completely drained; this is especially |