releases/2.6.32.10/thinkpad-acpi-fix-poll-thread-auto-start.patch

From b589ea4c44170d3f7a845684e2d1b3b9571663af Mon Sep 17 00:00:00 2001
From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Date: Thu, 25 Feb 2010 21:28:58 -0300
Subject: thinkpad-acpi: fix poll thread auto-start

From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>

commit b589ea4c44170d3f7a845684e2d1b3b9571663af upstream.

The driver was not starting the NVRAM polling thread if the input
device was bound immediately after registration.

This fixes:
http://bugzilla.kernel.org/show_bug.cgi?id=15118

Reported-by: Florian Zumbiehl <florz@florz.de>
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

---
 drivers/platform/x86/thinkpad_acpi.c |   15 ++++++---------
 1 file changed, 6 insertions(+), 9 deletions(-)

--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -2597,16 +2597,11 @@ static int hotkey_inputdev_open(struct i
 {
 	switch (tpacpi_lifecycle) {
 	case TPACPI_LIFE_INIT:
-		/*
-		 * hotkey_init will call hotkey_poll_setup_safe
-		 * at the appropriate moment
-		 */
-		return 0;
-	case TPACPI_LIFE_EXITING:
-		return -EBUSY;
 	case TPACPI_LIFE_RUNNING:
 		hotkey_poll_setup_safe(false);
 		return 0;
+	case TPACPI_LIFE_EXITING:
+		return -EBUSY;
 	}
 
 	/* Should only happen if tpacpi_lifecycle is corrupt */
@@ -2617,7 +2612,7 @@ static int hotkey_inputdev_open(struct i
 static void hotkey_inputdev_close(struct input_dev *dev)
 {
 	/* disable hotkey polling when possible */
-	if (tpacpi_lifecycle == TPACPI_LIFE_RUNNING &&
+	if (tpacpi_lifecycle != TPACPI_LIFE_EXITING &&
 	    !(hotkey_source_mask & hotkey_driver_mask))
 		hotkey_poll_setup_safe(false);
 }
@@ -8362,6 +8357,9 @@ static int __init thinkpad_acpi_module_i
 			return ret;
 		}
 	}
+
+	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
+
 	ret = input_register_device(tpacpi_inputdev);
 	if (ret < 0) {
 		printk(TPACPI_ERR "unable to register input device\n");
@@ -8371,7 +8369,6 @@ static int __init thinkpad_acpi_module_i
 		tp_features.input_device_registered = 1;
 	}
 
-	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;
 	return 0;
 }