serial/core: Initialize the console pm state

For console devices having UART_CAP_SLEEP capability, the uart_pm_state has
to be initialized to UART_PM_STATE_ON. Otherwise the LCR regiser values
are reinitialized when uart_change_pm is called from uart_configure_port.

Signed-off-by: Sudhir Sreedharan <ssreedharan@mvista.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index df3a8c74358e..e7d9d65095da 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2606,6 +2606,9 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
         if (uport->cons && uport->dev)
                 of_console_check(uport->dev->of_node, uport->cons->name, uport->line);
 
+        if (uart_console(uport))
+                state->pm_state = UART_PM_STATE_ON;
+
         uart_configure_port(drv, state, uport);
 
         num_groups = 2;