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Diffstat (limited to 'drivers/tty/serial/sunzilog.c')
| -rw-r--r-- | drivers/tty/serial/sunzilog.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/serial/sunzilog.c b/drivers/tty/serial/sunzilog.c index a85db8b8715..02df3940b95 100644 --- a/drivers/tty/serial/sunzilog.c +++ b/drivers/tty/serial/sunzilog.c @@ -703,6 +703,8 @@ static void sunzilog_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); |