1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/tty/serial/ip22zilog.c b/drivers/tty/serial/ip22zilog.c
index 1efd4c36ba0c..99b7b8697861 100644
--- a/drivers/tty/serial/ip22zilog.c
+++ b/drivers/tty/serial/ip22zilog.c
@@ -603,6 +603,8 @@ static void ip22zilog_start_tx(struct uart_port *port)
         } else {
                 struct circ_buf *xmit = &port->state->xmit;
 
+                if (uart_circ_empty(xmit))
+                        return;
                 writeb(xmit->buf[xmit->tail], &channel->data);
                 ZSDELAY();
                 ZS_WSYNC(channel);