Commit 8fef502e authored by Henrique de Moraes Holschuh's avatar Henrique de Moraes Holschuh Committed by Len Brown
Browse files

ACPI: thinkpad-acpi: keep track of module state 



Keep track of module state (init, running, exit).  This makes it trivially
easy to avoid running any interrupt handlers, threads, or any other async
activity before we are ready, or when we want to go away.

Signed-off-by: default avatarHenrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent 8523ed6f

drivers/misc/thinkpad_acpi.c

+19 −1
Original line number Diff line number Diff line
@@ -117,6 +117,12 @@ IBM_BIOS_MODULE_ALIAS("K[U,X-Z]"); 


#define __unused __attribute__ ((unused))



static enum {

	TPACPI_LIFE_INIT = 0,

	TPACPI_LIFE_RUNNING,

	TPACPI_LIFE_EXITING,

} tpacpi_lifecycle;



/****************************************************************************

 ****************************************************************************

 *
@@ -342,6 +348,9 @@ static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 
{

	struct ibm_struct *ibm = data;



	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)

		return;



	if (!ibm || !ibm->acpi || !ibm->acpi->notify)

		return;
@@ -3899,6 +3908,9 @@ static void fan_watchdog_fire(struct work_struct *ignored) 
{

	int rc;



	if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING)

		return;



	printk(IBM_NOTICE "fan watchdog: enabling fan\n");

	rc = fan_set_enable();

	if (rc < 0) {
@@ -3919,7 +3931,8 @@ static void fan_watchdog_reset(void) 
	if (fan_watchdog_active)

		cancel_delayed_work(&fan_watchdog_task);



	if (fan_watchdog_maxinterval > 0) {

	if (fan_watchdog_maxinterval > 0 &&

	    tpacpi_lifecycle != TPACPI_LIFE_EXITING) {

		fan_watchdog_active = 1;

		if (!schedule_delayed_work(&fan_watchdog_task,

				msecs_to_jiffies(fan_watchdog_maxinterval
@@ -4685,6 +4698,8 @@ static int __init thinkpad_acpi_module_init(void) 
{

	int ret, i;



	tpacpi_lifecycle = TPACPI_LIFE_INIT;



	/* Parameter checking */

	if (hotkey_report_mode > 2)

		return -EINVAL;
@@ -4781,6 +4796,7 @@ static int __init thinkpad_acpi_module_init(void) 
		tp_features.input_device_registered = 1;

	}



	tpacpi_lifecycle = TPACPI_LIFE_RUNNING;

	return 0;

}
@@ -4788,6 +4804,8 @@ static void thinkpad_acpi_module_exit(void) 
{

	struct ibm_struct *ibm, *itmp;



	tpacpi_lifecycle = TPACPI_LIFE_EXITING;



	list_for_each_entry_safe_reverse(ibm, itmp,

					 &tpacpi_all_drivers,

					 all_drivers) {

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