From ab88c8dc3bd667bcf21c8319165db92b930cf7e7 Mon Sep 17 00:00:00 2001
From: Doug Anderson <dianders@chromium.org>
Date: Mon, 21 Apr 2014 09:40:35 -0700
Subject: [PATCH] serial: samsung: don't check config for every character
The s3c24xx_serial_console_putchar() is _only_ ever used by
s3c24xx_serial_console_write() and is called in a loop (indirectly
through uart_console_write()). There's no reason to call
s3c24xx_port_configured() for every iteration through the loop. Move
it outside the loop.
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/tty/serial/samsung.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index a8e8b796f4f70..12442748d69f3 100644
--- a/drivers/tty/serial/samsung.c
+++ b/drivers/tty/serial/samsung.c
@@ -1464,11 +1464,6 @@ static void
s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
{
unsigned int ufcon = rd_regl(port, S3C2410_UFCON);
- unsigned int ucon = rd_regl(port, S3C2410_UCON);
-
- /* not possible to xmit on unconfigured port */
- if (!s3c24xx_port_configured(ucon))
- return;
while (!s3c24xx_serial_console_txrdy(port, ufcon))
barrier();
@@ -1479,6 +1474,12 @@ static void
s3c24xx_serial_console_write(struct console *co, const char *s,
unsigned int count)
{
+ unsigned int ucon = rd_regl(cons_uart, S3C2410_UCON);
+
+ /* not possible to xmit on unconfigured port */
+ if (!s3c24xx_port_configured(ucon))
+ return;
+
uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar);
}
--
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