selinux: Remove security_ops extern

[linux.git] / drivers / tty / serial / pmac_zilog.c

diff --git a/drivers/tty/serial/pmac_zilog.c b/drivers/tty/serial/pmac_zilog.c
index 8193635103eeefaf4f62cfd14eb3a4ab1be48fad..f7ad5b903055852fad68d2a69a2f826e5f795172 100644 (file)
--- a/drivers/tty/serial/pmac_zilog.c
+++ b/drivers/tty/serial/pmac_zilog.c
@@ -653,6 +653,8 @@ static void pmz_start_tx(struct uart_port *port)
        } else {
                struct circ_buf *xmit = &port->state->xmit;
 
+               if (uart_circ_empty(xmit))
+                       goto out;
                write_zsdata(uap, xmit->buf[xmit->tail]);
                zssync(uap);
                xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
@@ -661,6 +663,7 @@ static void pmz_start_tx(struct uart_port *port)
                if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
                        uart_write_wakeup(&uap->port);
        }
+ out:
        pmz_debug("pmz: start_tx() done.\n");
 }