serial: copy UART properties of UPF_FIXED_TYPE ports provisioned using early_serial_setup

Augment the UPF_FIXED_TYPE logic, which currently applies to UART ports
provisioned using platform_device_register.

The suggested patch applies same logic into 'serial8250_register_ports',
making UART ports provisioned using early_serial_setup inherit their
properties from the uart_config entry.

Signed-off-by: Shmulik Ladkani <shmulik@jungo.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 15 insertions, 6 deletions

diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
index a81ff7bc5fa1..7c4ebe6ee18b 100644
--- a/drivers/serial/8250.c
+++ b/drivers/serial/8250.c
@@ -2690,6 +2690,15 @@ static void __init serial8250_isa_init_ports(void)
         }
 }
 
+static void
+serial8250_init_fixed_type_port(struct uart_8250_port *up, unsigned int type)
+{
+        up->port.type = type;
+        up->port.fifosize = uart_config[type].fifo_size;
+        up->capabilities = uart_config[type].flags;
+        up->tx_loadsz = uart_config[type].tx_loadsz;
+}
+
 static void __init
 serial8250_register_ports(struct uart_driver *drv, struct device *dev)
 {
@@ -2706,6 +2715,10 @@ serial8250_register_ports(struct uart_driver *drv, struct device *dev)
                 struct uart_8250_port *up = &serial8250_ports[i];
 
                 up->port.dev = dev;
+
+                if (up->port.flags & UPF_FIXED_TYPE)
+                        serial8250_init_fixed_type_port(up, up->port.type);
+
                 uart_add_one_port(drv, &up->port);
         }
 }
@@ -3118,12 +3131,8 @@ int serial8250_register_port(struct uart_port *port)
                 if (port->dev)
                         uart->port.dev = port->dev;
 
-                if (port->flags & UPF_FIXED_TYPE) {
-                        uart->port.type = port->type;
-                        uart->port.fifosize = uart_config[port->type].fifo_size;
-                        uart->capabilities = uart_config[port->type].flags;
-                        uart->tx_loadsz = uart_config[port->type].tx_loadsz;
-                }
+                if (port->flags & UPF_FIXED_TYPE)
+                        serial8250_init_fixed_type_port(uart, port->type);
 
                 set_io_from_upio(&uart->port);
                 /* Possibly override default I/O functions.  */