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path: root/drivers/acpi/scan.c
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Diffstat (limited to 'drivers/acpi/scan.c')
-rw-r--r--drivers/acpi/scan.c183
1 files changed, 73 insertions, 110 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index fbdb82e70d10..15daa21fcd05 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -125,8 +125,8 @@ acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, cha
}
static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL);
-static acpi_status acpi_bus_offline_companions(acpi_handle handle, u32 lvl,
- void *data, void **ret_p)
+static acpi_status acpi_bus_offline(acpi_handle handle, u32 lvl, void *data,
+ void **ret_p)
{
struct acpi_device *device = NULL;
struct acpi_device_physical_node *pn;
@@ -136,6 +136,11 @@ static acpi_status acpi_bus_offline_companions(acpi_handle handle, u32 lvl,
if (acpi_bus_get_device(handle, &device))
return AE_OK;
+ if (device->handler && !device->handler->hotplug.enabled) {
+ *ret_p = &device->dev;
+ return AE_SUPPORT;
+ }
+
mutex_lock(&device->physical_node_lock);
list_for_each_entry(pn, &device->physical_node_list, node) {
@@ -168,8 +173,8 @@ static acpi_status acpi_bus_offline_companions(acpi_handle handle, u32 lvl,
return status;
}
-static acpi_status acpi_bus_online_companions(acpi_handle handle, u32 lvl,
- void *data, void **ret_p)
+static acpi_status acpi_bus_online(acpi_handle handle, u32 lvl, void *data,
+ void **ret_p)
{
struct acpi_device *device = NULL;
struct acpi_device_physical_node *pn;
@@ -214,26 +219,32 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
* If the first pass is successful, the second one isn't needed, though.
*/
errdev = NULL;
- acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
- NULL, acpi_bus_offline_companions,
- (void *)false, (void **)&errdev);
- acpi_bus_offline_companions(handle, 0, (void *)false, (void **)&errdev);
+ status = acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
+ NULL, acpi_bus_offline, (void *)false,
+ (void **)&errdev);
+ if (status == AE_SUPPORT) {
+ dev_warn(errdev, "Offline disabled.\n");
+ acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
+ acpi_bus_online, NULL, NULL, NULL);
+ put_device(&device->dev);
+ return -EPERM;
+ }
+ acpi_bus_offline(handle, 0, (void *)false, (void **)&errdev);
if (errdev) {
errdev = NULL;
acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX,
- NULL, acpi_bus_offline_companions,
- (void *)true , (void **)&errdev);
+ NULL, acpi_bus_offline, (void *)true,
+ (void **)&errdev);
if (!errdev || acpi_force_hot_remove)
- acpi_bus_offline_companions(handle, 0, (void *)true,
- (void **)&errdev);
+ acpi_bus_offline(handle, 0, (void *)true,
+ (void **)&errdev);
if (errdev && !acpi_force_hot_remove) {
dev_warn(errdev, "Offline failed.\n");
- acpi_bus_online_companions(handle, 0, NULL, NULL);
+ acpi_bus_online(handle, 0, NULL, NULL);
acpi_walk_namespace(ACPI_TYPE_ANY, handle,
- ACPI_UINT32_MAX,
- acpi_bus_online_companions, NULL,
- NULL, NULL);
+ ACPI_UINT32_MAX, acpi_bus_online,
+ NULL, NULL, NULL);
put_device(&device->dev);
return -EBUSY;
}
@@ -274,49 +285,45 @@ static int acpi_scan_hot_remove(struct acpi_device *device)
return 0;
}
-static void acpi_bus_device_eject(void *context)
+void acpi_bus_device_eject(void *data, u32 ost_src)
{
- acpi_handle handle = context;
- struct acpi_device *device = NULL;
- struct acpi_scan_handler *handler;
+ struct acpi_device *device = data;
+ acpi_handle handle = device->handle;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
int error;
lock_device_hotplug();
mutex_lock(&acpi_scan_lock);
- acpi_bus_get_device(handle, &device);
- if (!device)
- goto err_out;
+ if (ost_src == ACPI_NOTIFY_EJECT_REQUEST)
+ acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST,
+ ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
- handler = device->handler;
- if (!handler || !handler->hotplug.enabled) {
- ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
- goto err_out;
- }
- acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST,
- ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
- if (handler->hotplug.mode == AHM_CONTAINER)
+ if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER)
kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE);
- get_device(&device->dev);
error = acpi_scan_hot_remove(device);
- if (error)
+ if (error == -EPERM) {
+ goto err_support;
+ } else if (error) {
goto err_out;
+ }
out:
mutex_unlock(&acpi_scan_lock);
unlock_device_hotplug();
return;
+ err_support:
+ ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
err_out:
- acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code,
- NULL);
+ acpi_evaluate_hotplug_ost(handle, ost_src, ost_code, NULL);
goto out;
}
-static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
+static void acpi_scan_bus_device_check(void *data, u32 ost_source)
{
+ acpi_handle handle = data;
struct acpi_device *device = NULL;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
int error;
@@ -331,8 +338,6 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
goto out;
}
}
- acpi_evaluate_hotplug_ost(handle, ost_source,
- ACPI_OST_SC_INSERT_IN_PROGRESS, NULL);
error = acpi_bus_scan(handle);
if (error) {
acpi_handle_warn(handle, "Namespace scan failure\n");
@@ -353,18 +358,6 @@ static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source)
unlock_device_hotplug();
}
-static void acpi_scan_bus_check(void *context)
-{
- acpi_scan_bus_device_check((acpi_handle)context,
- ACPI_NOTIFY_BUS_CHECK);
-}
-
-static void acpi_scan_device_check(void *context)
-{
- acpi_scan_bus_device_check((acpi_handle)context,
- ACPI_NOTIFY_DEVICE_CHECK);
-}
-
static void acpi_hotplug_unsupported(acpi_handle handle, u32 type)
{
u32 ost_status;
@@ -395,8 +388,8 @@ static void acpi_hotplug_unsupported(acpi_handle handle, u32 type)
static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
{
- acpi_osd_exec_callback callback;
struct acpi_scan_handler *handler = data;
+ struct acpi_device *adev;
acpi_status status;
if (!handler->hotplug.enabled)
@@ -405,56 +398,34 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
- callback = acpi_scan_bus_check;
break;
case ACPI_NOTIFY_DEVICE_CHECK:
acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
- callback = acpi_scan_device_check;
break;
case ACPI_NOTIFY_EJECT_REQUEST:
acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
- callback = acpi_bus_device_eject;
- break;
+ if (acpi_bus_get_device(handle, &adev))
+ goto err_out;
+
+ get_device(&adev->dev);
+ status = acpi_hotplug_execute(acpi_bus_device_eject, adev, type);
+ if (ACPI_SUCCESS(status))
+ return;
+
+ put_device(&adev->dev);
+ goto err_out;
default:
/* non-hotplug event; possibly handled by other handler */
return;
}
- status = acpi_os_hotplug_execute(callback, handle);
- if (ACPI_FAILURE(status))
- acpi_evaluate_hotplug_ost(handle, type,
- ACPI_OST_SC_NON_SPECIFIC_FAILURE,
- NULL);
-}
-
-/**
- * acpi_bus_hot_remove_device: hot-remove a device and its children
- * @context: struct acpi_eject_event pointer (freed in this func)
- *
- * Hot-remove a device and its children. This function frees up the
- * memory space passed by arg context, so that the caller may call
- * this function asynchronously through acpi_os_hotplug_execute().
- */
-void acpi_bus_hot_remove_device(void *context)
-{
- struct acpi_eject_event *ej_event = context;
- struct acpi_device *device = ej_event->device;
- acpi_handle handle = device->handle;
- int error;
-
- lock_device_hotplug();
- mutex_lock(&acpi_scan_lock);
-
- error = acpi_scan_hot_remove(device);
- if (error && handle)
- acpi_evaluate_hotplug_ost(handle, ej_event->event,
- ACPI_OST_SC_NON_SPECIFIC_FAILURE,
- NULL);
+ status = acpi_hotplug_execute(acpi_scan_bus_device_check, handle, type);
+ if (ACPI_SUCCESS(status))
+ return;
- mutex_unlock(&acpi_scan_lock);
- unlock_device_hotplug();
- kfree(context);
+ err_out:
+ acpi_evaluate_hotplug_ost(handle, type,
+ ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
}
-EXPORT_SYMBOL(acpi_bus_hot_remove_device);
static ssize_t real_power_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
@@ -487,10 +458,8 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
const char *buf, size_t count)
{
struct acpi_device *acpi_device = to_acpi_device(d);
- struct acpi_eject_event *ej_event;
acpi_object_type not_used;
acpi_status status;
- int ret;
if (!count || buf[0] != '1')
return -EINVAL;
@@ -503,28 +472,18 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
return -ENODEV;
- ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL);
- if (!ej_event) {
- ret = -ENOMEM;
- goto err_out;
- }
acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
- ej_event->device = acpi_device;
- ej_event->event = ACPI_OST_EC_OSPM_EJECT;
get_device(&acpi_device->dev);
- status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event);
+ status = acpi_hotplug_execute(acpi_bus_device_eject, acpi_device,
+ ACPI_OST_EC_OSPM_EJECT);
if (ACPI_SUCCESS(status))
return count;
put_device(&acpi_device->dev);
- kfree(ej_event);
- ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
-
- err_out:
acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL);
- return ret;
+ return status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN;
}
static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store);
@@ -968,7 +927,7 @@ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
}
return 0;
}
-EXPORT_SYMBOL_GPL(acpi_bus_get_device);
+EXPORT_SYMBOL(acpi_bus_get_device);
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *))
@@ -999,7 +958,6 @@ 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) {
@@ -1121,7 +1079,7 @@ int acpi_bus_register_driver(struct acpi_driver *driver)
EXPORT_SYMBOL(acpi_bus_register_driver);
/**
- * acpi_bus_unregister_driver - unregisters a driver with the APIC bus
+ * acpi_bus_unregister_driver - unregisters a driver with the ACPI bus
* @driver: driver to unregister
*
* Unregisters a driver with the ACPI bus. Searches the namespace for all
@@ -1677,7 +1635,6 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
void acpi_device_add_finalize(struct acpi_device *device)
{
- device->flags.match_driver = true;
dev_set_uevent_suppress(&device->dev, false);
kobject_uevent(&device->dev.kobj, KOBJ_ADD);
}
@@ -1916,8 +1873,12 @@ static acpi_status acpi_bus_device_attach(acpi_handle handle, u32 lvl_not_used,
return AE_OK;
ret = acpi_scan_attach_handler(device);
- if (ret)
- return ret > 0 ? AE_OK : AE_CTRL_DEPTH;
+ if (ret < 0)
+ return AE_CTRL_DEPTH;
+
+ device->flags.match_driver = true;
+ if (ret > 0)
+ return AE_OK;
ret = device_attach(&device->dev);
return ret >= 0 ? AE_OK : AE_CTRL_DEPTH;
@@ -2028,6 +1989,7 @@ static int acpi_bus_scan_fixed(void)
if (result)
return result;
+ device->flags.match_driver = true;
result = device_attach(&device->dev);
if (result < 0)
return result;
@@ -2044,6 +2006,7 @@ static int acpi_bus_scan_fixed(void)
if (result)
return result;
+ device->flags.match_driver = true;
result = device_attach(&device->dev);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.