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-rw-r--r--drivers/acpi/device_pm.c12
-rw-r--r--drivers/cpuidle/cpuidle.c3
-rw-r--r--drivers/cpuidle/driver.c10
3 files changed, 23 insertions, 2 deletions
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 08bb9f2f2d23..5e4a8860a9c0 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1314,9 +1314,19 @@ static void acpi_dev_pm_detach(struct device *dev, bool power_off)
*/
int acpi_dev_pm_attach(struct device *dev, bool power_on)
{
+ /*
+ * Skip devices whose ACPI companions match the device IDs below,
+ * because they require special power management handling incompatible
+ * with the generic ACPI PM domain.
+ */
+ static const struct acpi_device_id special_pm_ids[] = {
+ {"PNP0C0B", }, /* Generic ACPI fan */
+ {"INT3404", }, /* Fan */
+ {}
+ };
struct acpi_device *adev = ACPI_COMPANION(dev);
- if (!adev)
+ if (!adev || !acpi_match_device_ids(adev, special_pm_ids))
return 0;
/*
diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 0005be5ea2b4..33d19c8eb027 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -381,7 +381,8 @@ u64 cpuidle_poll_time(struct cpuidle_driver *drv,
if (dev->states_usage[i].disable)
continue;
- limit_ns = (u64)drv->states[i].target_residency_ns;
+ limit_ns = drv->states[i].target_residency_ns;
+ break;
}
dev->poll_limit_ns = limit_ns;
diff --git a/drivers/cpuidle/driver.c b/drivers/cpuidle/driver.c
index c76423aaef4d..ce6a5f80fb83 100644
--- a/drivers/cpuidle/driver.c
+++ b/drivers/cpuidle/driver.c
@@ -403,6 +403,13 @@ void cpuidle_driver_state_disabled(struct cpuidle_driver *drv, int idx,
mutex_lock(&cpuidle_lock);
+ spin_lock(&cpuidle_driver_lock);
+
+ if (!drv->cpumask) {
+ drv->states[idx].flags |= CPUIDLE_FLAG_UNUSABLE;
+ goto unlock;
+ }
+
for_each_cpu(cpu, drv->cpumask) {
struct cpuidle_device *dev = per_cpu(cpuidle_devices, cpu);
@@ -415,5 +422,8 @@ void cpuidle_driver_state_disabled(struct cpuidle_driver *drv, int idx,
dev->states_usage[idx].disable &= ~CPUIDLE_STATE_DISABLED_BY_DRIVER;
}
+unlock:
+ spin_unlock(&cpuidle_driver_lock);
+
mutex_unlock(&cpuidle_lock);
}