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>
diff --git a/drivers/tty/serial/mxs-auart.c b/drivers/tty/serial/mxs-auart.c
index 7e02c9c..076169f 100644
--- a/drivers/tty/serial/mxs-auart.c
+++ b/drivers/tty/serial/mxs-auart.c
@@ -145,11 +145,12 @@
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);