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-rw-r--r--drivers/misc/thinkpad_acpi.c20
1 files changed, 19 insertions, 1 deletions
diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 0ced9d65c6b..2155139793b 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -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) {