diff --git a/drivers/usb/serial/pl2303.c b/drivers/usb/serial/pl2303.c
index 91f14c6..299a0ff 100644
--- a/drivers/usb/serial/pl2303.c
+++ b/drivers/usb/serial/pl2303.c
@@ -790,8 +790,10 @@
 		tty_flag = TTY_PARITY;
 	else if (line_status & UART_FRAME_ERROR)
 		tty_flag = TTY_FRAME;
-	dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__, tty_flag);
 
+	if (tty_flag != TTY_NORMAL)
+		dev_dbg(&port->dev, "%s - tty_flag = %d\n", __func__,
+								tty_flag);
 	/* overrun is special, not associated with a char */
 	if (line_status & UART_OVERRUN_ERROR)
 		tty_insert_flip_char(&port->port, 0, TTY_OVERRUN);