serial: core: Use spin_lock_irq() in uart_set_termios()

uart_set_termios() is called with interrupts enabled; no need to
save and restore the interrupt state when taking the uart port lock.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 7d51e26..df3a8c7 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1249,7 +1249,6 @@ static void uart_set_termios(struct tty_struct *tty,
 {
        struct uart_state *state = tty->driver_data;
        struct uart_port *uport = state->uart_port;
-       unsigned long flags;
        unsigned int cflag = tty->termios.c_cflag;
        unsigned int iflag_mask = IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK;
        bool sw_changed = false;
@@ -1303,19 +1302,19 @@ static void uart_set_termios(struct tty_struct *tty,
 
        /* Handle turning off CRTSCTS */
        if ((old_termios->c_cflag & CRTSCTS) && !(cflag & CRTSCTS)) {
-               spin_lock_irqsave(&uport->lock, flags);
+               spin_lock_irq(&uport->lock);
                uport->hw_stopped = 0;
                __uart_start(tty);
-               spin_unlock_irqrestore(&uport->lock, flags);
+               spin_unlock_irq(&uport->lock);
        }
        /* Handle turning on CRTSCTS */
        else if (!(old_termios->c_cflag & CRTSCTS) && (cflag & CRTSCTS)) {
-               spin_lock_irqsave(&uport->lock, flags);
+               spin_lock_irq(&uport->lock);
                if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS)) {
                        uport->hw_stopped = 1;
                        uport->ops->stop_tx(uport);
                }
-               spin_unlock_irqrestore(&uport->lock, flags);
+               spin_unlock_irq(&uport->lock);
        }
 }