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>

2 files changed, 3 insertions, 3 deletions

diff --git a/net/irda/ircomm/ircomm_tty.c b/net/irda/ircomm/ircomm_tty.c
index 96689906b93c..95a3a7a336ba 100644
--- a/net/irda/ircomm/ircomm_tty.c
+++ b/net/irda/ircomm/ircomm_tty.c
@@ -1070,7 +1070,7 @@ void ircomm_tty_check_modem_status(struct ircomm_tty_cb *self)
                         goto put;
                 }
         }
-        if (tty && self->port.flags & ASYNC_CTS_FLOW) {
+        if (tty && tty_port_cts_enabled(&self->port)) {
                 if (tty->hw_stopped) {
                         if (status & IRCOMM_CTS) {
                                 IRDA_DEBUG(2,
@@ -1313,7 +1313,7 @@ static void ircomm_tty_line_info(struct ircomm_tty_cb *self, struct seq_file *m)
 
         seq_puts(m, "Flags:");
         sep = ' ';
-        if (self->port.flags & ASYNC_CTS_FLOW) {
+        if (tty_port_cts_enabled(&self->port)) {
                 seq_printf(m, "%cASYNC_CTS_FLOW", sep);
                 sep = '|';
         }
diff --git a/net/irda/ircomm/ircomm_tty_attach.c b/net/irda/ircomm/ircomm_tty_attach.c
index 3ab70e7a0715..edab393e0c82 100644
--- a/net/irda/ircomm/ircomm_tty_attach.c
+++ b/net/irda/ircomm/ircomm_tty_attach.c
@@ -578,7 +578,7 @@ void ircomm_tty_link_established(struct ircomm_tty_cb *self)
          * will have to wait for the peer device (DCE) to raise the CTS
          * line.
          */
-        if ((self->port.flags & ASYNC_CTS_FLOW) &&
+        if (tty_port_cts_enabled(&self->port) &&
                         ((self->settings.dce & IRCOMM_CTS) == 0)) {
                 IRDA_DEBUG(0, "%s(), waiting for CTS ...\n", __func__ );
                 goto put;