[PATCH 2/2] serial/mxs-auart: only wake up tty layer once
From: Uwe Kleine-König <hidden>
Date: 2011-11-22 13:23:33
Subsystem:
the rest, tty layer and serial drivers · Maintainers:
Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
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 <redacted> --- drivers/tty/serial/mxs-auart.c | 5 +++-- 1 files changed, 3 insertions(+), 2 deletions(-)
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 @@ 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);
--
1.7.7.3
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