diff --git a/drivers/serial/netx-serial.c b/drivers/serial/netx-serial.c
index 3123ffe..81ac9bb 100644
--- a/drivers/serial/netx-serial.c
+++ b/drivers/serial/netx-serial.c
@@ -287,6 +287,7 @@
 {
 	unsigned int val;
 
+	/* FIXME: Locking needed ? */
 	if (mctrl & TIOCM_RTS) {
 		val = readl(port->membase + UART_RTS_CR);
 		writel(val | RTS_CR_RTS, port->membase + UART_RTS_CR);