serial: 8250: Refactor serial console restore-from-suspend
Move h/w reinit of serial console restore-from-suspend into
standalone helper function.
No functional change.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c
index e54de00..e27c761 100644
--- a/drivers/tty/serial/8250/8250_port.c
+++ b/drivers/tty/serial/8250/8250_port.c
@@ -2803,6 +2803,27 @@
}
/*
+ * Restore serial console when h/w power-off detected
+ */
+static void serial8250_console_restore(struct uart_8250_port *up)
+{
+ struct uart_port *port = &up->port;
+ struct ktermios termios;
+ unsigned int baud, quot, frac = 0;
+
+ termios.c_cflag = port->cons->cflag;
+ if (port->state->port.tty && termios.c_cflag == 0)
+ termios.c_cflag = port->state->port.tty->termios.c_cflag;
+
+ baud = serial8250_get_baud_rate(port, &termios, NULL);
+ quot = serial8250_get_divisor(up, baud, &frac);
+
+ serial8250_set_divisor(port, baud, quot, frac);
+ serial_port_out(port, UART_LCR, up->lcr);
+ serial_port_out(port, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
+}
+
+/*
* Print a string to the serial port trying not to disturb
* any possible real use of the port...
*
@@ -2839,20 +2860,7 @@
/* check scratch reg to see if port powered off during system sleep */
if (up->canary && (up->canary != serial_port_in(port, UART_SCR))) {
- struct ktermios termios;
- unsigned int baud, quot, frac = 0;
-
- termios.c_cflag = port->cons->cflag;
- if (port->state->port.tty && termios.c_cflag == 0)
- termios.c_cflag = port->state->port.tty->termios.c_cflag;
-
- baud = serial8250_get_baud_rate(port, &termios, NULL);
- quot = serial8250_get_divisor(up, baud, &frac);
-
- serial8250_set_divisor(port, baud, quot, frac);
- serial_port_out(port, UART_LCR, up->lcr);
- serial_port_out(port, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
-
+ serial8250_console_restore(up);
up->canary = 0;
}