serial: add a new helper function

In most of the time, the driver needs to check if the cts flow control
is enabled. But now, the driver checks the ASYNC_CTS_FLOW flag manually,
which is not a grace way. So add a new wraper function to make the code
tidy and clean.

Signed-off-by: Huang Shijie <shijie8@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

9 files changed, 10 insertions, 10 deletions

diff --git a/drivers/tty/amiserial.c b/drivers/tty/amiserial.c
index 2b7535d42e05..42d0a2581a87 100644
--- a/drivers/tty/amiserial.c
+++ b/drivers/tty/amiserial.c
@@ -420,7 +420,7 @@ static void check_modem_status(struct serial_state *info)
                                 tty_hangup(port->tty);
                 }
         }
-        if (port->flags & ASYNC_CTS_FLOW) {
+        if (tty_port_cts_enabled(port)) {
                 if (port->tty->hw_stopped) {
                         if (!(status & SER_CTS)) {
 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
diff --git a/drivers/tty/cyclades.c b/drivers/tty/cyclades.c
index e3954dae5064..0a6a0bc1b598 100644
--- a/drivers/tty/cyclades.c
+++ b/drivers/tty/cyclades.c
@@ -727,7 +727,7 @@ static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
                 else
                         tty_hangup(tty);
         }
-        if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
+        if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
                 if (tty->hw_stopped) {
                         if (mdm_status & CyCTS) {
                                 /* cy_start isn't used
diff --git a/drivers/tty/isicom.c b/drivers/tty/isicom.c
index 99cf22e5f2b6..d7492e183607 100644
--- a/drivers/tty/isicom.c
+++ b/drivers/tty/isicom.c
@@ -600,7 +600,7 @@ static irqreturn_t isicom_interrupt(int irq, void *dev_id)
                                         port->status &= ~ISI_DCD;
                         }
 
-                        if (port->port.flags & ASYNC_CTS_FLOW) {
+                        if (tty_port_cts_enabled(&port->port)) {
                                 if (tty->hw_stopped) {
                                         if (header & ISI_CTS) {
                                                 port->port.tty->hw_stopped = 0;
diff --git a/drivers/tty/mxser.c b/drivers/tty/mxser.c
index bb2da4ca8257..cfda47dabd28 100644
--- a/drivers/tty/mxser.c
+++ b/drivers/tty/mxser.c
@@ -830,7 +830,7 @@ static void mxser_check_modem_status(struct tty_struct *tty,
                         wake_up_interruptible(&port->port.open_wait);
         }
 
-        if (port->port.flags & ASYNC_CTS_FLOW) {
+        if (tty_port_cts_enabled(&port->port)) {
                 if (tty->hw_stopped) {
                         if (status & UART_MSR_CTS) {
                                 tty->hw_stopped = 0;
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 3a667eed63d6..dafeef2bfb49 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -262,7 +262,7 @@ static void mxs_auart_set_mctrl(struct uart_port *u, unsigned mctrl)
 
         ctrl &= ~AUART_CTRL2_RTSEN;
         if (mctrl & TIOCM_RTS) {
-                if (u->state->port.flags & ASYNC_CTS_FLOW)
+                if (tty_port_cts_enabled(&u->state->port))
                         ctrl |= AUART_CTRL2_RTSEN;
         }
 
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index bb5f23603836..137b25ce39a7 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -176,7 +176,7 @@ static int uart_port_startup(struct tty_struct *tty, struct uart_state *state,
                                 uart_set_mctrl(uport, TIOCM_RTS | TIOCM_DTR);
                 }
 
-                if (port->flags & ASYNC_CTS_FLOW) {
+                if (tty_port_cts_enabled(port)) {
                         spin_lock_irq(&uport->lock);
                         if (!(uport->ops->get_mctrl(uport) & TIOCM_CTS))
                                 tty->hw_stopped = 1;
@@ -2509,7 +2509,7 @@ void uart_handle_cts_change(struct uart_port *uport, unsigned int status)
 
         uport->icount.cts++;
 
-        if (port->flags & ASYNC_CTS_FLOW) {
+        if (tty_port_cts_enabled(port)) {
                 if (tty->hw_stopped) {
                         if (status) {
                                 tty->hw_stopped = 0;
diff --git a/drivers/tty/synclink.c b/drivers/tty/synclink.c
index 666aa1455fc7..70e3a525bc82 100644
--- a/drivers/tty/synclink.c
+++ b/drivers/tty/synclink.c
@@ -1359,7 +1359,7 @@ static void mgsl_isr_io_pin( struct mgsl_struct *info )
                         }
                 }
         
-                if ( (info->port.flags & ASYNC_CTS_FLOW) && 
+                if (tty_port_cts_enabled(&info->port) &&
                      (status & MISCSTATUS_CTS_LATCHED) ) {
                         if (info->port.tty->hw_stopped) {
                                 if (status & MISCSTATUS_CTS) {
diff --git a/drivers/tty/synclink_gt.c b/drivers/tty/synclink_gt.c
index 45f6136f4e51..b38e954eedd3 100644
--- a/drivers/tty/synclink_gt.c
+++ b/drivers/tty/synclink_gt.c
@@ -2053,7 +2053,7 @@ static void cts_change(struct slgt_info *info, unsigned short status)
         wake_up_interruptible(&info->event_wait_q);
         info->pending_bh |= BH_STATUS;
 
-        if (info->port.flags & ASYNC_CTS_FLOW) {
+        if (tty_port_cts_enabled(&info->port)) {
                 if (info->port.tty) {
                         if (info->port.tty->hw_stopped) {
                                 if (info->signals & SerialSignal_CTS) {
diff --git a/drivers/tty/synclinkmp.c b/drivers/tty/synclinkmp.c
index 53429c890a89..f17d9f3d84a2 100644
--- a/drivers/tty/synclinkmp.c
+++ b/drivers/tty/synclinkmp.c
@@ -2500,7 +2500,7 @@ static void isr_io_pin( SLMP_INFO *info, u16 status )
                         }
                 }
 
-                if ( (info->port.flags & ASYNC_CTS_FLOW) &&
+                if (tty_port_cts_enabled(&info->port) &&
                      (status & MISCSTATUS_CTS_LATCHED) ) {
                         if ( info->port.tty ) {
                                 if (info->port.tty->hw_stopped) {