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>

1 files changed, 6 insertions, 5 deletions

diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c
index a8e8b796f4f7..12442748d69f 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);
 }