serial: core: Colocate crucial structure linkage

The key function of uart_add_one_port() is to cross-reference the
UART driver's port structure with the serial core's state table;
keep the assignments together and document this crucial association.

Signed-off-by: Peter Hurley <peter@hurleysoftware.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 af1d466..e0082b7 100644 (file)
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2590,11 +2590,12 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
                goto out;
        }
 
+       /* Link the port to the driver state table and vice versa */
        state->uart_port = uport;
-       state->pm_state = UART_PM_STATE_UNDEFINED;
+       uport->state = state;
 
+       state->pm_state = UART_PM_STATE_UNDEFINED;
        uport->cons = drv->cons;
-       uport->state = state;
 
        /*
         * If this port is a console, then the spinlock is already