serial/mxs-auart: only wake up tty layer once

There is no need to call uart_write_wakeup after each character send.
Once at the end of the write sequence is enough.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 7e02c9c344fe..076169f50b01 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -145,11 +145,12 @@ static inline void mxs_auart_tx_chars(struct mxs_auart_port *s)
                         writel(xmit->buf[xmit->tail],
                                      s->port.membase + AUART_DATA);
                         xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
-                        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
-                                uart_write_wakeup(&s->port);
                 } else
                         break;
         }
+        if (uart_circ_chars_pending(xmit) < WAKEUP_CHARS)
+                uart_write_wakeup(&s->port);
+
         if (uart_circ_empty(&(s->port.state->xmit)))
                 writel(AUART_INTR_TXIEN,
                              s->port.membase + AUART_INTR_CLR);