summaryrefslogtreecommitdiffstats
path: root/drivers/acpi
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi')
-rw-r--r--drivers/acpi/pci_root.c17
-rw-r--r--drivers/acpi/power.c58
-rw-r--r--drivers/acpi/scan.c1
-rw-r--r--drivers/acpi/sleep.c12
-rw-r--r--drivers/acpi/wakeup.c4
5 files changed, 49 insertions, 43 deletions
diff --git a/drivers/acpi/pci_root.c b/drivers/acpi/pci_root.c
index 55b5b90c2a44..31b961c2f22f 100644
--- a/drivers/acpi/pci_root.c
+++ b/drivers/acpi/pci_root.c
@@ -61,20 +61,6 @@ static struct acpi_driver acpi_pci_root_driver = {
},
};
-struct acpi_pci_root {
- struct list_head node;
- struct acpi_device *device;
- struct pci_bus *bus;
- u16 segment;
- u8 bus_nr;
-
- u32 osc_support_set; /* _OSC state of support bits */
- u32 osc_control_set; /* _OSC state of control bits */
- u32 osc_control_qry; /* the latest _OSC query result */
-
- u32 osc_queried:1; /* has _OSC control been queried? */
-};
-
static LIST_HEAD(acpi_pci_roots);
static struct acpi_pci_driver *sub_driver;
@@ -317,7 +303,7 @@ static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags)
return status;
}
-static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
+struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
{
struct acpi_pci_root *root;
@@ -327,6 +313,7 @@ static struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle)
}
return NULL;
}
+EXPORT_SYMBOL_GPL(acpi_pci_find_root);
struct acpi_handle_node {
struct list_head node;
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index d74365d4a6e7..5a09bf392ec1 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -44,6 +44,8 @@
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#include "sleep.h"
+
#define _COMPONENT ACPI_POWER_COMPONENT
ACPI_MODULE_NAME("power");
#define ACPI_POWER_CLASS "power_resource"
@@ -361,17 +363,15 @@ int acpi_device_sleep_wake(struct acpi_device *dev,
*/
int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
{
- int i, err;
+ int i, err = 0;
if (!dev || !dev->wakeup.flags.valid)
return -EINVAL;
- /*
- * Do not execute the code below twice in a row without calling
- * acpi_disable_wakeup_device_power() in between for the same device
- */
- if (dev->wakeup.flags.prepared)
- return 0;
+ mutex_lock(&acpi_device_lock);
+
+ if (dev->wakeup.prepare_count++)
+ goto out;
/* Open power resource */
for (i = 0; i < dev->wakeup.resources.count; i++) {
@@ -379,7 +379,8 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
if (ret) {
printk(KERN_ERR PREFIX "Transition power state\n");
dev->wakeup.flags.valid = 0;
- return -ENODEV;
+ err = -ENODEV;
+ goto err_out;
}
}
@@ -388,9 +389,13 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
* in arbitrary power state afterwards.
*/
err = acpi_device_sleep_wake(dev, 1, sleep_state, 3);
- if (!err)
- dev->wakeup.flags.prepared = 1;
+ err_out:
+ if (err)
+ dev->wakeup.prepare_count = 0;
+
+ out:
+ mutex_unlock(&acpi_device_lock);
return err;
}
@@ -402,35 +407,42 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state)
*/
int acpi_disable_wakeup_device_power(struct acpi_device *dev)
{
- int i, ret;
+ int i, err = 0;
if (!dev || !dev->wakeup.flags.valid)
return -EINVAL;
+ mutex_lock(&acpi_device_lock);
+
+ if (--dev->wakeup.prepare_count > 0)
+ goto out;
+
/*
- * Do not execute the code below twice in a row without calling
- * acpi_enable_wakeup_device_power() in between for the same device
+ * Executing the code below even if prepare_count is already zero when
+ * the function is called may be useful, for example for initialisation.
*/
- if (!dev->wakeup.flags.prepared)
- return 0;
+ if (dev->wakeup.prepare_count < 0)
+ dev->wakeup.prepare_count = 0;
- dev->wakeup.flags.prepared = 0;
-
- ret = acpi_device_sleep_wake(dev, 0, 0, 0);
- if (ret)
- return ret;
+ err = acpi_device_sleep_wake(dev, 0, 0, 0);
+ if (err)
+ goto out;
/* Close power resource */
for (i = 0; i < dev->wakeup.resources.count; i++) {
- ret = acpi_power_off_device(dev->wakeup.resources.handles[i], dev);
+ int ret = acpi_power_off_device(
+ dev->wakeup.resources.handles[i], dev);
if (ret) {
printk(KERN_ERR PREFIX "Transition power state\n");
dev->wakeup.flags.valid = 0;
- return -ENODEV;
+ err = -ENODEV;
+ goto out;
}
}
- return ret;
+ out:
+ mutex_unlock(&acpi_device_lock);
+ return err;
}
/* --------------------------------------------------------------------------
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index 781435d7e369..318b1ea7a5bf 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -781,6 +781,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device)
kfree(buffer.pointer);
device->wakeup.flags.valid = 1;
+ device->wakeup.prepare_count = 0;
/* Call _PSW/_DSW object to disable its ability to wake the sleeping
* system for the ACPI device with the _PRW object.
* The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW.
diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
index 42159a28f433..feece693d773 100644
--- a/drivers/acpi/sleep.c
+++ b/drivers/acpi/sleep.c
@@ -689,19 +689,25 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
acpi_handle handle;
struct acpi_device *adev;
+ int error;
- if (!device_may_wakeup(dev))
+ if (!device_can_wakeup(dev))
return -EINVAL;
handle = DEVICE_ACPI_HANDLE(dev);
if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &adev))) {
- printk(KERN_DEBUG "ACPI handle has no context!\n");
+ dev_dbg(dev, "ACPI handle has no context in %s!\n", __func__);
return -ENODEV;
}
- return enable ?
+ error = enable ?
acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) :
acpi_disable_wakeup_device_power(adev);
+ if (!error)
+ dev_info(dev, "wake-up capability %s by ACPI\n",
+ enable ? "enabled" : "disabled");
+
+ return error;
}
#endif
diff --git a/drivers/acpi/wakeup.c b/drivers/acpi/wakeup.c
index 88725dcdf8bc..e0ee0c036f5a 100644
--- a/drivers/acpi/wakeup.c
+++ b/drivers/acpi/wakeup.c
@@ -68,7 +68,7 @@ void acpi_enable_wakeup_device(u8 sleep_state)
/* If users want to disable run-wake GPE,
* we only disable it for wake and leave it for runtime
*/
- if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+ if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
|| sleep_state > (u32) dev->wakeup.sleep_state) {
if (dev->wakeup.flags.run_wake) {
/* set_gpe_type will disable GPE, leave it like that */
@@ -100,7 +100,7 @@ void acpi_disable_wakeup_device(u8 sleep_state)
if (!dev->wakeup.flags.valid)
continue;
- if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared)
+ if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
|| sleep_state > (u32) dev->wakeup.sleep_state) {
if (dev->wakeup.flags.run_wake) {
acpi_set_gpe_type(dev->wakeup.gpe_device,
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-30 11:42:45 +0100