linux-kernel - [PATCH] serial/core: Initialize the console pm state

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Date:	Mon, 22 Sep 2014 12:00:22 +0530
From:	Sudhir Sreedharan <ssreedharan@...sta.com>
To:	linux-serial@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, jslaby@...e.cz,
	linux-kernel@...r.kernel.org,
	Sudhir Sreedharan <ssreedharan@...sta.com>
Subject: [PATCH] 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@...sta.com>
---
 drivers/tty/serial/serial_core.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 29a7be4..91bfd52 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2615,6 +2615,9 @@ 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;
-- 
1.7.0.1

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