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-rw-r--r--Documentation/kernel-parameters.txt55
-rw-r--r--drivers/acpi/bus.c53
-rw-r--r--drivers/acpi/pci_link.c4
-rw-r--r--drivers/acpi/power.c68
-rw-r--r--drivers/acpi/scan.c62
-rw-r--r--drivers/acpi/wmi.c10
-rw-r--r--drivers/misc/acer-wmi.c10
-rw-r--r--drivers/pnp/pnpacpi/core.c6
-rw-r--r--include/acpi/acpi_drivers.h1
9 files changed, 183 insertions, 86 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index 1150444a21ab..99cf83fd6947 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -217,20 +217,47 @@ and is between 256 and 4096 characters. It is defined in the file
acpi.debug_level= [HW,ACPI]
Format: <int>
Each bit of the <int> indicates an ACPI debug level,
- 1: enable, 0: disable. It is useful for boot time
- debugging. After system has booted up, it can be set
- via /sys/module/acpi/parameters/debug_level.
- CONFIG_ACPI_DEBUG must be enabled for this to produce any output.
- Available bits (add the numbers together) to enable different
- debug output levels of the ACPI subsystem:
- 0x01 error 0x02 warn 0x04 init 0x08 debug object
- 0x10 info 0x20 init names 0x40 parse 0x80 load
- 0x100 dispatch 0x200 execute 0x400 names 0x800 operation region
- 0x1000 bfield 0x2000 tables 0x4000 values 0x8000 objects
- 0x10000 resources 0x20000 user requests 0x40000 package.
- The number can be in decimal or prefixed with 0x in hex.
- Warning: Many of these options can produce a lot of
- output and make your system unusable. Be very careful.
+ which corresponds to the level in an ACPI_DEBUG_PRINT
+ statement. After system has booted up, this mask
+ can be set via /sys/module/acpi/parameters/debug_level.
+
+ CONFIG_ACPI_DEBUG must be enabled for this to produce
+ any output. The number can be in decimal or prefixed
+ with 0x in hex. Some of these options produce so much
+ output that the system is unusable.
+
+ The following global components are defined by the
+ ACPI CA:
+ 0x01 error
+ 0x02 warn
+ 0x04 init
+ 0x08 debug object
+ 0x10 info
+ 0x20 init names
+ 0x40 parse
+ 0x80 load
+ 0x100 dispatch
+ 0x200 execute
+ 0x400 names
+ 0x800 operation region
+ 0x1000 bfield
+ 0x2000 tables
+ 0x4000 values
+ 0x8000 objects
+ 0x10000 resources
+ 0x20000 user requests
+ 0x40000 package
+ The number can be in decimal or prefixed with 0x in hex.
+ Warning: Many of these options can produce a lot of
+ output and make your system unusable. Be very careful.
+
+ acpi.power_nocheck= [HW,ACPI]
+ Format: 1/0 enable/disable the check of power state.
+ On some bogus BIOS the _PSC object/_STA object of
+ power resource can't return the correct device power
+ state. In such case it is unneccessary to check its
+ power state again in power transition.
+ 1 : disable the power state check
acpi_pm_good [X86-32,X86-64]
Override the pmtimer bug detection: force the kernel
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index ccae305ee55d..e9b116d2b56d 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -48,6 +48,23 @@ EXPORT_SYMBOL(acpi_root_dir);
#define STRUCT_TO_INT(s) (*((int*)&s))
+static int set_power_nocheck(const struct dmi_system_id *id)
+{
+ printk(KERN_NOTICE PREFIX "%s detected - "
+ "disable power check in power transistion\n", id->ident);
+ acpi_power_nocheck = 1;
+ return 0;
+}
+static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
+ {
+ set_power_nocheck, "HP Pavilion 05", {
+ DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"),
+ DMI_MATCH(DMI_SYS_VENDOR, "HP Pavilion 05"),
+ DMI_MATCH(DMI_PRODUCT_VERSION, "2001211RE101GLEND") }, NULL},
+ {},
+};
+
+
/* --------------------------------------------------------------------------
Device Management
-------------------------------------------------------------------------- */
@@ -95,21 +112,21 @@ int acpi_bus_get_status(struct acpi_device *device)
}
/*
- * Otherwise we assume the status of our parent (unless we don't
- * have one, in which case status is implied).
+ * According to ACPI spec some device can be present and functional
+ * even if the parent is not present but functional.
+ * In such conditions the child device should not inherit the status
+ * from the parent.
*/
- else if (device->parent)
- device->status = device->parent->status;
else
STRUCT_TO_INT(device->status) =
ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
if (device->status.functional && !device->status.present) {
- printk(KERN_WARNING PREFIX "Device [%s] status [%08x]: "
- "functional but not present; setting present\n",
- device->pnp.bus_id, (u32) STRUCT_TO_INT(device->status));
- device->status.present = 1;
+ ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
+ "functional but not present;\n",
+ device->pnp.bus_id,
+ (u32) STRUCT_TO_INT(device->status)));
}
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
@@ -223,7 +240,19 @@ int acpi_bus_set_power(acpi_handle handle, int state)
/*
* Get device's current power state
*/
- acpi_bus_get_power(device->handle, &device->power.state);
+ if (!acpi_power_nocheck) {
+ /*
+ * Maybe the incorrect power state is returned on the bogus
+ * bios, which is different with the real power state.
+ * For example: the bios returns D0 state and the real power
+ * state is D3. OS expects to set the device to D0 state. In
+ * such case if OS uses the power state returned by the BIOS,
+ * the device can't be transisted to the correct power state.
+ * So if the acpi_power_nocheck is set, it is unnecessary to
+ * get the power state by calling acpi_bus_get_power.
+ */
+ acpi_bus_get_power(device->handle, &device->power.state);
+ }
if ((state == device->power.state) && !device->flags.force_power_state) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
state));
@@ -818,7 +847,11 @@ static int __init acpi_init(void)
}
} else
disable_acpi();
-
+ /*
+ * If the laptop falls into the DMI check table, the power state check
+ * will be disabled in the course of device power transistion.
+ */
+ dmi_check_system(power_nocheck_dmi_table);
return result;
}
diff --git a/drivers/acpi/pci_link.c b/drivers/acpi/pci_link.c
index cf47805a7448..65bf4fa59633 100644
--- a/drivers/acpi/pci_link.c
+++ b/drivers/acpi/pci_link.c
@@ -709,7 +709,7 @@ int acpi_pci_link_free_irq(acpi_handle handle)
acpi_device_bid(link->device)));
if (link->refcnt == 0) {
- acpi_ut_evaluate_object(link->device->handle, "_DIS", 0, NULL);
+ acpi_evaluate_object(link->device->handle, "_DIS", NULL, NULL);
}
mutex_unlock(&acpi_link_lock);
return (link->irq.active);
@@ -773,7 +773,7 @@ static int acpi_pci_link_add(struct acpi_device *device)
end:
/* disable all links -- to be activated on use */
- acpi_ut_evaluate_object(device->handle, "_DIS", 0, NULL);
+ acpi_evaluate_object(device->handle, "_DIS", NULL, NULL);
mutex_unlock(&acpi_link_lock);
if (result)
diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 4ab21cb1c8c7..7ff7349c0c52 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -54,6 +54,14 @@ ACPI_MODULE_NAME("power");
#define ACPI_POWER_RESOURCE_STATE_OFF 0x00
#define ACPI_POWER_RESOURCE_STATE_ON 0x01
#define ACPI_POWER_RESOURCE_STATE_UNKNOWN 0xFF
+
+#ifdef MODULE_PARAM_PREFIX
+#undef MODULE_PARAM_PREFIX
+#endif
+#define MODULE_PARAM_PREFIX "acpi."
+int acpi_power_nocheck;
+module_param_named(power_nocheck, acpi_power_nocheck, bool, 000);
+
static int acpi_power_add(struct acpi_device *device);
static int acpi_power_remove(struct acpi_device *device, int type);
static int acpi_power_resume(struct acpi_device *device);
@@ -128,16 +136,16 @@ acpi_power_get_context(acpi_handle handle,
return 0;
}
-static int acpi_power_get_state(struct acpi_power_resource *resource, int *state)
+static int acpi_power_get_state(acpi_handle handle, int *state)
{
acpi_status status = AE_OK;
unsigned long sta = 0;
- if (!resource || !state)
+ if (!handle || !state)
return -EINVAL;
- status = acpi_evaluate_integer(resource->device->handle, "_STA", NULL, &sta);
+ status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
if (ACPI_FAILURE(status))
return -ENODEV;
@@ -145,7 +153,7 @@ static int acpi_power_get_state(struct acpi_power_resource *resource, int *state
ACPI_POWER_RESOURCE_STATE_OFF;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Resource [%s] is %s\n",
- resource->name, state ? "on" : "off"));
+ acpi_ut_get_node_name(handle), state ? "on" : "off"));
return 0;
}
@@ -153,7 +161,6 @@ static int acpi_power_get_state(struct acpi_power_resource *resource, int *state
static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
{
int result = 0, state1;
- struct acpi_power_resource *resource = NULL;
u32 i = 0;
@@ -161,12 +168,15 @@ static int acpi_power_get_list_state(struct acpi_handle_list *list, int *state)
return -EINVAL;
/* The state of the list is 'on' IFF all resources are 'on'. */
+ /* */
for (i = 0; i < list->count; i++) {
- result = acpi_power_get_context(list->handles[i], &resource);
- if (result)
- return result;
- result = acpi_power_get_state(resource, &state1);
+ /*
+ * The state of the power resource can be obtained by
+ * using the ACPI handle. In such case it is unnecessary to
+ * get the Power resource first and then get its state again.
+ */
+ result = acpi_power_get_state(list->handles[i], &state1);
if (result)
return result;
@@ -226,12 +236,18 @@ static int acpi_power_on(acpi_handle handle, struct acpi_device *dev)
if (ACPI_FAILURE(status))
return -ENODEV;
- result = acpi_power_get_state(resource, &state);
- if (result)
- return result;
- if (state != ACPI_POWER_RESOURCE_STATE_ON)
- return -ENOEXEC;
-
+ if (!acpi_power_nocheck) {
+ /*
+ * If acpi_power_nocheck is set, it is unnecessary to check
+ * the power state after power transition.
+ */
+ result = acpi_power_get_state(resource->device->handle,
+ &state);
+ if (result)
+ return result;
+ if (state != ACPI_POWER_RESOURCE_STATE_ON)
+ return -ENOEXEC;
+ }
/* Update the power resource's _device_ power state */
resource->device->power.state = ACPI_STATE_D0;
@@ -277,11 +293,17 @@ static int acpi_power_off_device(acpi_handle handle, struct acpi_device *dev)
if (ACPI_FAILURE(status))
return -ENODEV;
- result = acpi_power_get_state(resource, &state);
- if (result)
- return result;
- if (state != ACPI_POWER_RESOURCE_STATE_OFF)
- return -ENOEXEC;
+ if (!acpi_power_nocheck) {
+ /*
+ * If acpi_power_nocheck is set, it is unnecessary to check
+ * the power state after power transition.
+ */
+ result = acpi_power_get_state(handle, &state);
+ if (result)
+ return result;
+ if (state != ACPI_POWER_RESOURCE_STATE_OFF)
+ return -ENOEXEC;
+ }
/* Update the power resource's _device_ power state */
resource->device->power.state = ACPI_STATE_D3;
@@ -555,7 +577,7 @@ static int acpi_power_seq_show(struct seq_file *seq, void *offset)
if (!resource)
goto end;
- result = acpi_power_get_state(resource, &state);
+ result = acpi_power_get_state(resource->device->handle, &state);
if (result)
goto end;
@@ -668,7 +690,7 @@ static int acpi_power_add(struct acpi_device *device)
resource->system_level = acpi_object.power_resource.system_level;
resource->order = acpi_object.power_resource.resource_order;
- result = acpi_power_get_state(resource, &state);
+ result = acpi_power_get_state(device->handle, &state);
if (result)
goto end;
@@ -735,7 +757,7 @@ static int acpi_power_resume(struct acpi_device *device)
resource = (struct acpi_power_resource *)acpi_driver_data(device);
- result = acpi_power_get_state(resource, &state);
+ result = acpi_power_get_state(device->handle, &state);
if (result)
return result;
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index f6f52c1a2aba..91fed422bae8 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -276,6 +276,13 @@ int acpi_match_device_ids(struct acpi_device *device,
{
const struct acpi_device_id *id;
+ /*
+ * If the device is not present, it is unnecessary to load device
+ * driver for it.
+ */
+ if (!device->status.present)
+ return -ENODEV;
+
if (device->flags.hardware_id) {
for (id = ids; id->id[0]; id++) {
if (!strcmp((char*)id->id, device->pnp.hardware_id))
@@ -807,6 +814,7 @@ static int acpi_bus_get_power_flags(struct acpi_device *device)
/* TBD: System wake support and resource requirements. */
device->power.state = ACPI_STATE_UNKNOWN;
+ acpi_bus_get_power(device->handle, &(device->power.state));
return 0;
}
@@ -1153,20 +1161,6 @@ static int acpi_bus_remove(struct acpi_device *dev, int rmdevice)
}
static int
-acpi_is_child_device(struct acpi_device *device,
- int (*matcher)(struct acpi_device *))
-{
- int result = -ENODEV;
-
- do {
- if (ACPI_SUCCESS(matcher(device)))
- return AE_OK;
- } while ((device = device->parent));
-
- return result;
-}
-
-static int
acpi_add_single_object(struct acpi_device **child,
struct acpi_device *parent, acpi_handle handle, int type,
struct acpi_bus_ops *ops)
@@ -1221,15 +1215,18 @@ acpi_add_single_object(struct acpi_device **child,
result = -ENODEV;
goto end;
}
- if (!device->status.present) {
- /* Bay and dock should be handled even if absent */
- if (!ACPI_SUCCESS(
- acpi_is_child_device(device, acpi_bay_match)) &&
- !ACPI_SUCCESS(
- acpi_is_child_device(device, acpi_dock_match))) {
- result = -ENODEV;
- goto end;
- }
+ /*
+ * When the device is neither present nor functional, the
+ * device should not be added to Linux ACPI device tree.
+ * When the status of the device is not present but functinal,
+ * it should be added to Linux ACPI tree. For example : bay
+ * device , dock device.
+ * In such conditions it is unncessary to check whether it is
+ * bay device or dock device.
+ */
+ if (!device->status.present && !device->status.functional) {
+ result = -ENODEV;
+ goto end;
}
break;
default:
@@ -1252,6 +1249,16 @@ acpi_add_single_object(struct acpi_device **child,
acpi_device_set_id(device, parent, handle, type);
/*
+ * The ACPI device is attached to acpi handle before getting
+ * the power/wakeup/peformance flags. Otherwise OS can't get
+ * the corresponding ACPI device by the acpi handle in the course
+ * of getting the power/wakeup/performance flags.
+ */
+ result = acpi_device_set_context(device, type);
+ if (result)
+ goto end;
+
+ /*
* Power Management
* ----------------
*/
@@ -1281,8 +1288,6 @@ acpi_add_single_object(struct acpi_device **child,
goto end;
}
- if ((result = acpi_device_set_context(device, type)))
- goto end;
result = acpi_device_register(device, parent);
@@ -1402,7 +1407,12 @@ static int acpi_bus_scan(struct acpi_device *start, struct acpi_bus_ops *ops)
* TBD: Need notifications and other detection mechanisms
* in place before we can fully implement this.
*/
- if (child->status.present) {
+ /*
+ * When the device is not present but functional, it is also
+ * necessary to scan the children of this device.
+ */
+ if (child->status.present || (!child->status.present &&
+ child->status.functional)) {
status = acpi_get_next_object(ACPI_TYPE_ANY, chandle,
NULL, NULL);
if (ACPI_SUCCESS(status)) {
diff --git a/drivers/acpi/wmi.c b/drivers/acpi/wmi.c
index 5464cfcf8297..47cd7baf9b1b 100644
--- a/drivers/acpi/wmi.c
+++ b/drivers/acpi/wmi.c
@@ -271,7 +271,7 @@ u32 method_id, const struct acpi_buffer *in, struct acpi_buffer *out)
char method[4] = "WM";
if (!find_guid(guid_string, &wblock))
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
block = &wblock->gblock;
handle = wblock->handle;
@@ -333,7 +333,7 @@ struct acpi_buffer *out)
return AE_BAD_PARAMETER;
if (!find_guid(guid_string, &wblock))
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
block = &wblock->gblock;
handle = wblock->handle;
@@ -343,7 +343,7 @@ struct acpi_buffer *out)
/* Check GUID is a data block */
if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
input.count = 1;
input.pointer = wq_params;
@@ -414,7 +414,7 @@ const struct acpi_buffer *in)
return AE_BAD_DATA;
if (!find_guid(guid_string, &wblock))
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
block = &wblock->gblock;
handle = wblock->handle;
@@ -424,7 +424,7 @@ const struct acpi_buffer *in)
/* Check GUID is a data block */
if (block->flags & (ACPI_WMI_EVENT | ACPI_WMI_METHOD))
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
input.count = 2;
input.pointer = params;
diff --git a/drivers/misc/acer-wmi.c b/drivers/misc/acer-wmi.c
index cf4c39fbc66f..0532a2de2ce4 100644
--- a/drivers/misc/acer-wmi.c
+++ b/drivers/misc/acer-wmi.c
@@ -473,7 +473,7 @@ struct wmi_interface *iface)
}
break;
default:
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
}
return AE_OK;
}
@@ -511,7 +511,7 @@ static acpi_status AMW0_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
break;
}
default:
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
}
/* Actually do the set */
@@ -686,7 +686,7 @@ struct wmi_interface *iface)
return 0;
}
default:
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
}
status = WMI_execute_u32(method_id, 0, &result);
@@ -732,7 +732,7 @@ static acpi_status WMID_set_u32(u32 value, u32 cap, struct wmi_interface *iface)
}
break;
default:
- return AE_BAD_ADDRESS;
+ return AE_ERROR;
}
return WMI_execute_u32(method_id, (u32)value, NULL);
}
@@ -782,7 +782,7 @@ static struct wmi_interface wmid_interface = {
static acpi_status get_u32(u32 *value, u32 cap)
{
- acpi_status status = AE_BAD_ADDRESS;
+ acpi_status status = AE_ERROR;
switch (interface->type) {
case ACER_AMW0:
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
index c1b9ea34977b..98b9df7776e9 100644
--- a/drivers/pnp/pnpacpi/core.c
+++ b/drivers/pnp/pnpacpi/core.c
@@ -148,9 +148,13 @@ static int __init pnpacpi_add_device(struct acpi_device *device)
acpi_status status;
struct pnp_dev *dev;
+ /*
+ * If a PnPacpi device is not present , the device
+ * driver should not be loaded.
+ */
status = acpi_get_handle(device->handle, "_CRS", &temp);
if (ACPI_FAILURE(status) || !ispnpidacpi(acpi_device_hid(device)) ||
- is_exclusive_device(device))
+ is_exclusive_device(device) || (!device->status.present))
return 0;
dev = pnp_alloc_dev(&pnpacpi_protocol, num, acpi_device_hid(device));
diff --git a/include/acpi/acpi_drivers.h b/include/acpi/acpi_drivers.h
index e5f38e5ce86f..efbaa271ee11 100644
--- a/include/acpi/acpi_drivers.h
+++ b/include/acpi/acpi_drivers.h
@@ -93,6 +93,7 @@ int acpi_enable_wakeup_device_power(struct acpi_device *dev, int sleep_state);
int acpi_disable_wakeup_device_power(struct acpi_device *dev);
int acpi_power_get_inferred_state(struct acpi_device *device);
int acpi_power_transition(struct acpi_device *device, int state);
+extern int acpi_power_nocheck;
#endif
/* --------------------------------------------------------------------------
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 22:32:46 +0000