serial: core: Consolidate spin lock initialization code

We have two times duplicated excerpt where we initialize spin lock
for UART port. Consolidate it under uart_port_spin_lock_init() helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20200214114339.53897-3-andriy.shevchenko@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index d956da0..bb22870 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -1913,6 +1913,19 @@ static inline bool uart_console_enabled(struct uart_port *port)
        return uart_console(port) && (port->cons->flags & CON_ENABLED);
 }
 
+/*
+ * Ensure that the serial console lock is initialised early.
+ * If this port is a console, then the spinlock is already initialised.
+ */
+static inline void uart_port_spin_lock_init(struct uart_port *port)
+{
+       if (uart_console_enabled(port))
+               return;
+
+       spin_lock_init(&port->lock);
+       lockdep_set_class(&port->lock, &port_lock_key);
+}
+
 #if defined(CONFIG_SERIAL_CORE_CONSOLE) || defined(CONFIG_CONSOLE_POLL)
 /**
  *     uart_console_write - write a console message to a serial port
@@ -2065,16 +2078,7 @@ uart_set_options(struct uart_port *port, struct console *co,
        struct ktermios termios;
        static struct ktermios dummy;
 
-       /*
-        * Ensure that the serial console lock is initialised
-        * early.
-        * If this port is a console, then the spinlock is already
-        * initialised.
-        */
-       if (!uart_console_enabled(port)) {
-               spin_lock_init(&port->lock);
-               lockdep_set_class(&port->lock, &port_lock_key);
-       }
+       uart_port_spin_lock_init(port);
 
        memset(&termios, 0, sizeof(struct ktermios));
 
@@ -2829,14 +2833,8 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
                goto out;
        }
 
-       /*
-        * If this port is a console, then the spinlock is already
-        * initialised.
-        */
-       if (!uart_console_enabled(uport)) {
-               spin_lock_init(&uport->lock);
-               lockdep_set_class(&uport->lock, &port_lock_key);
-       }
+       uart_port_spin_lock_init(uport);
+
        if (uport->cons && uport->dev)
                of_console_check(uport->dev->of_node, uport->cons->name, uport->line);