diff options
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/serial_core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 5a78f6940760..f764de32b658 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -2743,6 +2743,8 @@ EXPORT_SYMBOL(uart_match_port); * uart_handle_dcd_change - handle a change of carrier detect state * @uport: uart_port structure for the open port * @status: new carrier detect status, nonzero if active + * + * Caller must hold uport->lock */ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) { @@ -2750,6 +2752,8 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status) struct tty_struct *tty = port->tty; struct tty_ldisc *ld; + lockdep_assert_held_once(&uport->lock); + if (tty) { ld = tty_ldisc_ref(tty); if (ld) { @@ -2774,12 +2778,16 @@ EXPORT_SYMBOL_GPL(uart_handle_dcd_change); * uart_handle_cts_change - handle a change of clear-to-send state * @uport: uart_port structure for the open port * @status: new clear to send status, nonzero if active + * + * Caller must hold uport->lock */ void uart_handle_cts_change(struct uart_port *uport, unsigned int status) { struct tty_port *port = &uport->state->port; struct tty_struct *tty = port->tty; + lockdep_assert_held_once(&uport->lock); + uport->icount.cts++; if (tty_port_cts_enabled(port)) { |