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path: root/drivers/tty/serial/serial_core.c
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Diffstat (limited to 'drivers/tty/serial/serial_core.c')
-rw-r--r--drivers/tty/serial/serial_core.c29
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index f764de32b658..dd21ed900635 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -59,6 +59,11 @@ static void uart_change_pm(struct uart_state *state,
static void uart_port_shutdown(struct tty_port *port);
+static int uart_dcd_enabled(struct uart_port *uport)
+{
+ return uport->status & UPSTAT_DCD_ENABLE;
+}
+
/*
* This routine is used by the interrupt handler to schedule processing in
* the software interrupt portion of the driver.
@@ -130,7 +135,6 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,
int init_hw)
{
struct uart_port *uport = state->uart_port;
- struct tty_port *port = &state->port;
unsigned long page;
int retval = 0;
@@ -176,12 +180,12 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,
uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);
}
- if (tty_port_cts_enabled(port)) {
- spin_lock_irq(&uport->lock);
+ spin_lock_irq(&uport->lock);
+ if (uart_cts_enabled(uport)) {
if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS))
tty->hw_stopped = 1;
- spin_unlock_irq(&uport->lock);
}
+ spin_unlock_irq(&uport->lock);
}
/*
@@ -435,7 +439,6 @@ EXPORT_SYMBOL(uart_get_divisor);
static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
struct ktermios *old_termios)
{
- struct tty_port *port = &state->port;
struct uart_port *uport = state->uart_port;
struct ktermios *termios;
@@ -450,17 +453,19 @@ static void uart_change_speed(struct tty_struct *tty, struct uart_state *state,
uport->ops->set_termios(uport, termios, old_termios);
/*
- * Set flags based on termios cflag
+ * Set modem status enables based on termios cflag
*/
+ spin_lock_irq(&uport->lock);
if (termios->c_cflag & CRTSCTS)
- set_bit(ASYNCB_CTS_FLOW, &port->flags);
+ uport->status |= UPSTAT_CTS_ENABLE;
else
- clear_bit(ASYNCB_CTS_FLOW, &port->flags);
+ uport->status &= ~UPSTAT_CTS_ENABLE;
if (termios->c_cflag & CLOCAL)
- clear_bit(ASYNCB_CHECK_CD, &port->flags);
+ uport->status &= ~UPSTAT_DCD_ENABLE;
else
- set_bit(ASYNCB_CHECK_CD, &port->flags);
+ uport->status |= UPSTAT_DCD_ENABLE;
+ spin_unlock_irq(&uport->lock);
}
static inline int __uart_put_char(struct uart_port *port,
@@ -2765,7 +2770,7 @@ void uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
uport->icount.dcd++;
- if (port->flags & ASYNC_CHECK_CD) {
+ if (uart_dcd_enabled(uport)) {
if (status)
wake_up_interruptible(&port->open_wait);
else if (tty)
@@ -2790,7 +2795,7 @@ void uart_handle_cts_change(struct uart_port *uport, unsigned int status)
uport->icount.cts++;
- if (tty_port_cts_enabled(port)) {
+ if (uart_cts_enabled(uport)) {
if (tty->hw_stopped) {
if (status) {
tty->hw_stopped = 0;