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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>
This commit is contained in:
Doug Anderson 2014-04-21 09:40:35 -07:00 committed by Greg Kroah-Hartman
parent bb7f09ba96
commit ab88c8dc3b
1 changed files with 6 additions and 5 deletions
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11
drivers/tty/serial/samsung.c
View File

@ -1464,11 +1464,6 @@ static void
s3c24xx_serial_console_putchar(struct uart_port *port, int ch) s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
{ {
unsigned int ufcon = rd_regl(port, S3C2410_UFCON); 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)) while (!s3c24xx_serial_console_txrdy(port, ufcon))
barrier(); barrier();
@ -1479,6 +1474,12 @@ static void
s3c24xx_serial_console_write(struct console *co, const char *s, s3c24xx_serial_console_write(struct console *co, const char *s,
unsigned int count) 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); uart_console_write(cons_uart, s, count, s3c24xx_serial_console_putchar);
} }