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path: root/drivers/acpi/power.c
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Diffstat (limited to 'drivers/acpi/power.c')
-rw-r--r--drivers/acpi/power.c45
1 files changed, 38 insertions, 7 deletions
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index e0bcfb642b52..93eac53b5110 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -684,7 +684,8 @@ int acpi_power_get_inferred_state(struct acpi_device *device, int *state)
}
}
- *state = ACPI_STATE_D3_COLD;
+ *state = device->power.states[ACPI_STATE_D3_COLD].flags.valid ?
+ ACPI_STATE_D3_COLD : ACPI_STATE_D3_HOT;
return 0;
}
@@ -710,8 +711,6 @@ int acpi_power_transition(struct acpi_device *device, int state)
|| (device->power.state > ACPI_STATE_D3_COLD))
return -ENODEV;
- /* TBD: Resources must be ordered. */
-
/*
* First we reference all power resources required in the target list
* (e.g. so the device doesn't lose power while transitioning). Then,
@@ -761,6 +760,25 @@ static void acpi_power_sysfs_remove(struct acpi_device *device)
device_remove_file(&device->dev, &dev_attr_resource_in_use);
}
+static void acpi_power_add_resource_to_list(struct acpi_power_resource *resource)
+{
+ mutex_lock(&power_resource_list_lock);
+
+ if (!list_empty(&acpi_power_resource_list)) {
+ struct acpi_power_resource *r;
+
+ list_for_each_entry(r, &acpi_power_resource_list, list_node)
+ if (r->order > resource->order) {
+ list_add_tail(&resource->list_node, &r->list_node);
+ goto out;
+ }
+ }
+ list_add_tail(&resource->list_node, &acpi_power_resource_list);
+
+ out:
+ mutex_unlock(&power_resource_list_lock);
+}
+
int acpi_add_power_resource(acpi_handle handle)
{
struct acpi_power_resource *resource;
@@ -811,9 +829,7 @@ int acpi_add_power_resource(acpi_handle handle)
if (!device_create_file(&device->dev, &dev_attr_resource_in_use))
device->remove = acpi_power_sysfs_remove;
- mutex_lock(&power_resource_list_lock);
- list_add(&resource->list_node, &acpi_power_resource_list);
- mutex_unlock(&power_resource_list_lock);
+ acpi_power_add_resource_to_list(resource);
acpi_device_add_finalize(device);
return 0;
@@ -844,7 +860,22 @@ void acpi_resume_power_resources(void)
&& resource->ref_count) {
dev_info(&resource->device.dev, "Turning ON\n");
__acpi_power_on(resource);
- } else if (state == ACPI_POWER_RESOURCE_STATE_ON
+ }
+
+ mutex_unlock(&resource->resource_lock);
+ }
+ list_for_each_entry_reverse(resource, &acpi_power_resource_list, list_node) {
+ int result, state;
+
+ mutex_lock(&resource->resource_lock);
+
+ result = acpi_power_get_state(resource->device.handle, &state);
+ if (result) {
+ mutex_unlock(&resource->resource_lock);
+ continue;
+ }
+
+ if (state == ACPI_POWER_RESOURCE_STATE_ON
&& !resource->ref_count) {
dev_info(&resource->device.dev, "Turning OFF\n");
__acpi_power_off(resource);