diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c
index b0d51558b73c..8c5b9ef708b3 100644
--- a/drivers/usb/serial/ssu100.c
+++ b/drivers/usb/serial/ssu100.c
@@ -32,6 +32,7 @@
 
 #define  SERIAL_EVEN_PARITY         (UART_LCR_PARITY | UART_LCR_EPAR)
 
+#define  MIN_BAUD_RATE              50
 #define  MAX_BAUD_RATE              460800
 
 #define ATC_DISABLED                0x00
@@ -217,9 +218,10 @@ static void ssu100_set_termios(struct tty_struct *tty,
 {
 	struct usb_device *dev = port->serial->dev;
 	struct ktermios *termios = &tty->termios;
-	u16 baud, divisor, remainder;
+	speed_t baud, remainder;
 	unsigned int cflag = termios->c_cflag;
 	u16 urb_value = 0; /* will hold the new flags */
+	u16 divisor;
 	int result;
 
 	if (cflag & PARENB) {
@@ -235,6 +237,18 @@ static void ssu100_set_termios(struct tty_struct *tty,
 	if (!baud)
 		baud = 9600;
 
+	if (baud < MIN_BAUD_RATE || baud > MAX_BAUD_RATE) {
+		if (old_termios)
+			baud = tty_termios_baud_rate(old_termios);
+		else
+			baud = clamp(baud, MIN_BAUD_RATE, MAX_BAUD_RATE);
+
+		tty_encode_baud_rate(tty, baud, baud);
+
+		if (!baud)
+			baud = 9600;
+	}
+
 	dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
 
 
@@ -310,7 +324,7 @@ static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 		dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
 
 	if (tty)
-		ssu100_set_termios(tty, port, &tty->termios);
+		ssu100_set_termios(tty, port, NULL);
 
 	return usb_serial_generic_open(tty, port);
 }