serial: 8250: Encapsulate port i/o method init

Prepare for 8250 split; introduce serial8250_set_defaults() to set default
port methods prior to driver override.

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 13 insertions, 4 deletions

diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c
index e59fd1dc1ad5..c5db1395c348 100644
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -3144,6 +3144,13 @@ static void serial8250_init_port(struct uart_8250_port *up)
         up->cur_iotype = 0xFF;
 }
 
+static void serial8250_set_defaults(struct uart_8250_port *up)
+{
+        struct uart_port *port = &up->port;
+
+        set_io_from_upio(port);
+}
+
 static void __init serial8250_isa_init_ports(void)
 {
         struct uart_8250_port *up;
@@ -3193,11 +3200,11 @@ static void __init serial8250_isa_init_ports(void)
                 port->membase  = old_serial_port[i].iomem_base;
                 port->iotype   = old_serial_port[i].io_type;
                 port->regshift = old_serial_port[i].iomem_reg_shift;
-                set_io_from_upio(port);
+                serial8250_set_defaults(up);
+
                 port->irqflags |= irqflag;
                 if (serial8250_isa_config != NULL)
                         serial8250_isa_config(i, &up->port, &up->capabilities);
-
         }
 }
 
@@ -3481,7 +3488,8 @@ int __init early_serial_setup(struct uart_port *port)
         p->type         = port->type;
         p->line         = port->line;
 
-        set_io_from_upio(p);
+        serial8250_set_defaults(up_to_u8250p(p));
+
         if (port->serial_in)
                 p->serial_in = port->serial_in;
         if (port->serial_out)
@@ -3751,7 +3759,8 @@ int serial8250_register_8250_port(struct uart_8250_port *up)
                 if (up->port.flags & UPF_FIXED_TYPE)
                         serial8250_init_fixed_type_port(uart, up->port.type);
 
-                set_io_from_upio(&uart->port);
+                serial8250_set_defaults(uart);
+
                 /* Possibly override default I/O functions.  */
                 if (up->port.serial_in)
                         uart->port.serial_in = up->port.serial_in;