diff --git a/drivers/tty/moxa.c b/drivers/tty/moxa.c
index 98e180f3a4ec..c2d717e64557 100644
--- a/drivers/tty/moxa.c
+++ b/drivers/tty/moxa.c
@@ -1443,10 +1443,10 @@ static bool moxa_carrier_raised(struct tty_port *port)
 	return dcd;
 }
 
-static void moxa_dtr_rts(struct tty_port *port, bool onoff)
+static void moxa_dtr_rts(struct tty_port *port, bool active)
 {
 	struct moxa_port *ch = container_of(port, struct moxa_port, port);
-	MoxaPortLineCtrl(ch, onoff, onoff);
+	MoxaPortLineCtrl(ch, active, active);
 }
 
 
@@ -1557,14 +1557,14 @@ static unsigned int moxa_chars_in_buffer(struct tty_struct *tty)
 static int moxa_tiocmget(struct tty_struct *tty)
 {
 	struct moxa_port *ch = tty->driver_data;
-	bool dtr, rts;
+	bool dtr_active, rts_active;
 	int flag = 0;
 	int status;
 
-	MoxaPortGetLineOut(ch, &dtr, &rts);
-	if (dtr)
+	MoxaPortGetLineOut(ch, &dtr_active, &rts_active);
+	if (dtr_active)
 		flag |= TIOCM_DTR;
-	if (rts)
+	if (rts_active)
 		flag |= TIOCM_RTS;
 	status = MoxaPortLineStatus(ch);
 	if (status & 1)
@@ -1579,8 +1579,8 @@ static int moxa_tiocmget(struct tty_struct *tty)
 static int moxa_tiocmset(struct tty_struct *tty,
 			 unsigned int set, unsigned int clear)
 {
+	bool dtr_active, rts_active;
 	struct moxa_port *ch;
-	bool dtr, rts;
 
 	mutex_lock(&moxa_openlock);
 	ch = tty->driver_data;
@@ -1589,16 +1589,16 @@ static int moxa_tiocmset(struct tty_struct *tty,
 		return -EINVAL;
 	}
 
-	MoxaPortGetLineOut(ch, &dtr, &rts);
+	MoxaPortGetLineOut(ch, &dtr_active, &rts_active);
 	if (set & TIOCM_RTS)
-		rts = true;
+		rts_active = true;
 	if (set & TIOCM_DTR)
-		dtr = true;
+		dtr_active = true;
 	if (clear & TIOCM_RTS)
-		rts = false;
+		rts_active = false;
 	if (clear & TIOCM_DTR)
-		dtr = false;
-	MoxaPortLineCtrl(ch, dtr, rts);
+		dtr_active = false;
+	MoxaPortLineCtrl(ch, dtr_active, rts_active);
 	mutex_unlock(&moxa_openlock);
 	return 0;
 }
@@ -1881,10 +1881,10 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode)
  *      Syntax:
  *      int  MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
  *           int port           : port number (0 - 127)
- *           bool * dtrState    : pointer to bool to receive the current DTR
+ *           bool * dtr_active  : pointer to bool to receive the current DTR
  *                                state. (if NULL, this function will not
  *                                write to this address)
- *           bool * rtsState    : pointer to bool to receive the current RTS
+ *           bool * rts_active  : pointer to bool to receive the current RTS
  *                                state. (if NULL, this function will not
  *                                write to this address)
  *
@@ -1896,8 +1896,8 @@ static void MoxaPortFlushData(struct moxa_port *port, int mode)
  *      Syntax:
  *      void MoxaPortLineCtrl(int port, bool dtrState, bool rtsState);
  *           int port           : port number (0 - 127)
- *           bool dtrState      : DTR output state (0: off, 1: on)
- *           bool rtsState      : RTS output state (0: off, 1: on)
+ *           bool dtr_active    : DTR output state
+ *           bool rts_active    : RTS output state
  *
  *
  *      Function 15:    Setting the flow control of this port.
@@ -2105,24 +2105,24 @@ static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
 	return baud;
 }
 
-static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtrState,
-		bool *rtsState)
+static int MoxaPortGetLineOut(struct moxa_port *port, bool *dtr_active,
+		bool *rts_active)
 {
-	if (dtrState)
-		*dtrState = port->lineCtrl & DTR_ON;
-	if (rtsState)
-		*rtsState = port->lineCtrl & RTS_ON;
+	if (dtr_active)
+		*dtr_active = port->lineCtrl & DTR_ON;
+	if (rts_active)
+		*rts_active = port->lineCtrl & RTS_ON;
 
 	return 0;
 }
 
-static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr, bool rts)
+static void MoxaPortLineCtrl(struct moxa_port *port, bool dtr_active, bool rts_active)
 {
 	u8 mode = 0;
 
-	if (dtr)
+	if (dtr_active)
 		mode |= DTR_ON;
-	if (rts)
+	if (rts_active)
 		mode |= RTS_ON;
 	port->lineCtrl = mode;
 	moxafunc(port->tableAddr, FC_LineControl, mode);
