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-rw-r--r--drivers/acpi/Kconfig8
-rw-r--r--drivers/acpi/device_pm.c56
-rw-r--r--drivers/acpi/power.c104
-rw-r--r--drivers/acpi/processor_idle.c46
-rw-r--r--drivers/acpi/scan.c1
5 files changed, 18 insertions, 197 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 22327e6a7236..6efe2ac6902f 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -24,7 +24,7 @@ menuconfig ACPI
are configured, ACPI is used.
The project home page for the Linux ACPI subsystem is here:
- <http://www.lesswatts.org/projects/acpi/>
+ <https://01.org/linux-acpi>
Linux support for ACPI is based on Intel Corporation's ACPI
Component Architecture (ACPI CA). For more information on the
@@ -123,9 +123,9 @@ config ACPI_BUTTON
default y
help
This driver handles events on the power, sleep, and lid buttons.
- A daemon reads /proc/acpi/event and perform user-defined actions
- such as shutting down the system. This is necessary for
- software-controlled poweroff.
+ A daemon reads events from input devices or via netlink and
+ performs user-defined actions such as shutting down the system.
+ This is necessary for software-controlled poweroff.
To compile this driver as a module, choose M here:
the module will be called button.
diff --git a/drivers/acpi/device_pm.c b/drivers/acpi/device_pm.c
index 59d3202f6b36..a94383d1f350 100644
--- a/drivers/acpi/device_pm.c
+++ b/drivers/acpi/device_pm.c
@@ -1025,60 +1025,4 @@ void acpi_dev_pm_detach(struct device *dev, bool power_off)
}
}
EXPORT_SYMBOL_GPL(acpi_dev_pm_detach);
-
-/**
- * acpi_dev_pm_add_dependent - Add physical device depending for PM.
- * @handle: Handle of ACPI device node.
- * @depdev: Device depending on that node for PM.
- */
-void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev)
-{
- struct acpi_device_physical_node *dep;
- struct acpi_device *adev;
-
- if (!depdev || acpi_bus_get_device(handle, &adev))
- return;
-
- mutex_lock(&adev->physical_node_lock);
-
- list_for_each_entry(dep, &adev->power_dependent, node)
- if (dep->dev == depdev)
- goto out;
-
- dep = kzalloc(sizeof(*dep), GFP_KERNEL);
- if (dep) {
- dep->dev = depdev;
- list_add_tail(&dep->node, &adev->power_dependent);
- }
-
- out:
- mutex_unlock(&adev->physical_node_lock);
-}
-EXPORT_SYMBOL_GPL(acpi_dev_pm_add_dependent);
-
-/**
- * acpi_dev_pm_remove_dependent - Remove physical device depending for PM.
- * @handle: Handle of ACPI device node.
- * @depdev: Device depending on that node for PM.
- */
-void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev)
-{
- struct acpi_device_physical_node *dep;
- struct acpi_device *adev;
-
- if (!depdev || acpi_bus_get_device(handle, &adev))
- return;
-
- mutex_lock(&adev->physical_node_lock);
-
- list_for_each_entry(dep, &adev->power_dependent, node)
- if (dep->dev == depdev) {
- list_del(&dep->node);
- kfree(dep);
- break;
- }
-
- mutex_unlock(&adev->physical_node_lock);
-}
-EXPORT_SYMBOL_GPL(acpi_dev_pm_remove_dependent);
#endif /* CONFIG_PM */
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 0dbe5cdf3396..c2ad391d8041 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -59,16 +59,9 @@ ACPI_MODULE_NAME("power");
#define ACPI_POWER_RESOURCE_STATE_ON 0x01
#define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
-struct acpi_power_dependent_device {
- struct list_head node;
- struct acpi_device *adev;
- struct work_struct work;
-};
-
struct acpi_power_resource {
struct acpi_device device;
struct list_head list_node;
- struct list_head dependent;
char *name;
u32 system_level;
u32 order;
@@ -233,32 +226,6 @@ static int acpi_power_get_list_state(struct list_head *list, int *state)
return 0;
}
-static void acpi_power_resume_dependent(struct work_struct *work)
-{
- struct acpi_power_dependent_device *dep;
- struct acpi_device_physical_node *pn;
- struct acpi_device *adev;
- int state;
-
- dep = container_of(work, struct acpi_power_dependent_device, work);
- adev = dep->adev;
- if (acpi_power_get_inferred_state(adev, &state))
- return;
-
- if (state > ACPI_STATE_D0)
- return;
-
- mutex_lock(&adev->physical_node_lock);
-
- list_for_each_entry(pn, &adev->physical_node_list, node)
- pm_request_resume(pn->dev);
-
- list_for_each_entry(pn, &adev->power_dependent, node)
- pm_request_resume(pn->dev);
-
- mutex_unlock(&adev->physical_node_lock);
-}
-
static int __acpi_power_on(struct acpi_power_resource *resource)
{
acpi_status status = AE_OK;
@@ -283,14 +250,8 @@ static int acpi_power_on_unlocked(struct acpi_power_resource *resource)
resource->name));
} else {
result = __acpi_power_on(resource);
- if (result) {
+ if (result)
resource->ref_count--;
- } else {
- struct acpi_power_dependent_device *dep;
-
- list_for_each_entry(dep, &resource->dependent, node)
- schedule_work(&dep->work);
- }
}
return result;
}
@@ -390,52 +351,6 @@ static int acpi_power_on_list(struct list_head *list)
return result;
}
-static void acpi_power_add_dependent(struct acpi_power_resource *resource,
- struct acpi_device *adev)
-{
- struct acpi_power_dependent_device *dep;
-
- mutex_lock(&resource->resource_lock);
-
- list_for_each_entry(dep, &resource->dependent, node)
- if (dep->adev == adev)
- goto out;
-
- dep = kzalloc(sizeof(*dep), GFP_KERNEL);
- if (!dep)
- goto out;
-
- dep->adev = adev;
- INIT_WORK(&dep->work, acpi_power_resume_dependent);
- list_add_tail(&dep->node, &resource->dependent);
-
- out:
- mutex_unlock(&resource->resource_lock);
-}
-
-static void acpi_power_remove_dependent(struct acpi_power_resource *resource,
- struct acpi_device *adev)
-{
- struct acpi_power_dependent_device *dep;
- struct work_struct *work = NULL;
-
- mutex_lock(&resource->resource_lock);
-
- list_for_each_entry(dep, &resource->dependent, node)
- if (dep->adev == adev) {
- list_del(&dep->node);
- work = &dep->work;
- break;
- }
-
- mutex_unlock(&resource->resource_lock);
-
- if (work) {
- cancel_work_sync(work);
- kfree(dep);
- }
-}
-
static struct attribute *attrs[] = {
NULL,
};
@@ -524,8 +439,6 @@ static void acpi_power_expose_hide(struct acpi_device *adev,
void acpi_power_add_remove_device(struct acpi_device *adev, bool add)
{
- struct acpi_device_power_state *ps;
- struct acpi_power_resource_entry *entry;
int state;
if (adev->wakeup.flags.valid)
@@ -535,16 +448,6 @@ void acpi_power_add_remove_device(struct acpi_device *adev, bool add)
if (!adev->power.flags.power_resources)
return;
- ps = &adev->power.states[ACPI_STATE_D0];
- list_for_each_entry(entry, &ps->resources, node) {
- struct acpi_power_resource *resource = entry->resource;
-
- if (add)
- acpi_power_add_dependent(resource, adev);
- else
- acpi_power_remove_dependent(resource, adev);
- }
-
for (state = ACPI_STATE_D0; state <= ACPI_STATE_D3_HOT; state++)
acpi_power_expose_hide(adev,
&adev->power.states[state].resources,
@@ -882,7 +785,6 @@ int acpi_add_power_resource(acpi_handle handle)
acpi_init_device_object(device, handle, ACPI_BUS_TYPE_POWER,
ACPI_STA_DEFAULT);
mutex_init(&resource->resource_lock);
- INIT_LIST_HEAD(&resource->dependent);
INIT_LIST_HEAD(&resource->list_node);
resource->name = device->pnp.bus_id;
strcpy(acpi_device_name(device), ACPI_POWER_DEVICE_NAME);
@@ -936,8 +838,10 @@ void acpi_resume_power_resources(void)
mutex_lock(&resource->resource_lock);
result = acpi_power_get_state(resource->device.handle, &state);
- if (result)
+ if (result) {
+ mutex_unlock(&resource->resource_lock);
continue;
+ }
if (state == ACPI_POWER_RESOURCE_STATE_OFF
&& resource->ref_count) {
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index f98dd00b51a9..c7414a545a4f 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -119,17 +119,10 @@ static struct dmi_system_id processor_power_dmi_table[] = {
*/
static void acpi_safe_halt(void)
{
- current_thread_info()->status &= ~TS_POLLING;
- /*
- * TS_POLLING-cleared state must be visible before we
- * test NEED_RESCHED:
- */
- smp_mb();
- if (!need_resched()) {
+ if (!tif_need_resched()) {
safe_halt();
local_irq_disable();
}
- current_thread_info()->status |= TS_POLLING;
}
#ifdef ARCH_APICTIMER_STOPS_ON_C3
@@ -737,6 +730,11 @@ static int acpi_idle_enter_c1(struct cpuidle_device *dev,
if (unlikely(!pr))
return -EINVAL;
+ if (cx->entry_method == ACPI_CSTATE_FFH) {
+ if (current_set_polling_and_test())
+ return -EINVAL;
+ }
+
lapic_timer_state_broadcast(pr, cx, 1);
acpi_idle_do_entry(cx);
@@ -790,18 +788,9 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
if (unlikely(!pr))
return -EINVAL;
- if (cx->entry_method != ACPI_CSTATE_FFH) {
- current_thread_info()->status &= ~TS_POLLING;
- /*
- * TS_POLLING-cleared state must be visible before we test
- * NEED_RESCHED:
- */
- smp_mb();
-
- if (unlikely(need_resched())) {
- current_thread_info()->status |= TS_POLLING;
+ if (cx->entry_method == ACPI_CSTATE_FFH) {
+ if (current_set_polling_and_test())
return -EINVAL;
- }
}
/*
@@ -819,9 +808,6 @@ static int acpi_idle_enter_simple(struct cpuidle_device *dev,
sched_clock_idle_wakeup_event(0);
- if (cx->entry_method != ACPI_CSTATE_FFH)
- current_thread_info()->status |= TS_POLLING;
-
lapic_timer_state_broadcast(pr, cx, 0);
return index;
}
@@ -858,18 +844,9 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
}
}
- if (cx->entry_method != ACPI_CSTATE_FFH) {
- current_thread_info()->status &= ~TS_POLLING;
- /*
- * TS_POLLING-cleared state must be visible before we test
- * NEED_RESCHED:
- */
- smp_mb();
-
- if (unlikely(need_resched())) {
- current_thread_info()->status |= TS_POLLING;
+ if (cx->entry_method == ACPI_CSTATE_FFH) {
+ if (current_set_polling_and_test())
return -EINVAL;
- }
}
acpi_unlazy_tlb(smp_processor_id());
@@ -915,9 +892,6 @@ static int acpi_idle_enter_bm(struct cpuidle_device *dev,
sched_clock_idle_wakeup_event(0);
- if (cx->entry_method != ACPI_CSTATE_FFH)
- current_thread_info()->status |= TS_POLLING;
-
lapic_timer_state_broadcast(pr, cx, 0);
return index;
}
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 407ad13cac2f..fee8a297c7d9 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -999,7 +999,6 @@ int acpi_device_add(struct acpi_device *device,
INIT_LIST_HEAD(&device->wakeup_list);
INIT_LIST_HEAD(&device->physical_node_list);
mutex_init(&device->physical_node_lock);
- INIT_LIST_HEAD(&device->power_dependent);
new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL);
if (!new_bus_id) {
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-12 06:29:58 +0000