linux-2.6.33/device_add()
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開始行:
*参照元 [#vb5dea8c]
#backlinks
*説明 [#c5a2de98]
-パス: [[linux-2.6.33/drivers/base/core.c]]
-FIXME: これは何？
--説明
**引数 [#n102b8bd]
-struct device *dev
--
--[[linux-2.6.33/device]]
**返り値 [#acebff9f]
-int
--0: 成功、0 以外: 失敗
--通例として失敗時はエラー番号を負の値で返す（-EINVAL な...
--[[linux-2.6.33/include/linux/errno.h]]
**参考 [#h2017505]
*実装 [#ibebcae1]
/**
* device_add - add device to device hierarchy.
* @dev: device.
*
* This is part 2 of device_register(), though may be ca...
* separately _iff_ device_initialize() has been called ...
*
* This adds @dev to the kobject hierarchy via kobject_a...
* to the global and sibling lists for the device, then
* adds it to the other relevant subsystems of the drive...
*
* NOTE: _Never_ directly free @dev after calling this f...
* if it returned an error! Always use put_device() to g...
* reference instead.
*/
int device_add(struct device *dev)
{
struct device *parent = NULL;
struct class_interface *class_intf;
-
--[[linux-2.6.33/device]]
-
--[[linux-2.6.33/class_interface]]
int error = -EINVAL;
dev = get_device(dev);
if (!dev)
goto done;
-
--[[linux-2.6.33/get_device()]]
if (!dev->p) {
error = device_private_init(dev);
if (error)
goto done;
}
-dev->p は struct device_private 型
--[[linux-2.6.33/device_private]]
-
--[[linux-2.6.33/device_private_init()]]
/*
* for statically allocated devices, which should all b...
* some day, we need to initialize the name. We prevent...
* the name, and force the use of dev_name()
*/
if (dev->init_name) {
dev_set_name(dev, "%s", dev->init_name);
dev->init_name = NULL;
}
-
--[[linux-2.6.33/dev_set_name()]]
if (!dev_name(dev)) {
error = -EINVAL;
goto name_error;
}
-
--[[linux-2.6.33/dev_name()]]
pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
-
--[[linux-2.6.33/pr_debug()]]
parent = get_device(dev->parent);
setup_parent(dev, parent);
-
--[[linux-2.6.33/get_device()]]
-
--[[linux-2.6.33/setup_parent()]]
/* use parent numa_node */
if (parent)
set_dev_node(dev, dev_to_node(parent));
-
--[[linux-2.6.33/set_dev_node()]]
--[[linux-2.6.33/dev_to_node()]]
/* first, register with generic layer. */
/* we require the name to be set before, and pass NULL */
error = kobject_add(&dev->kobj, dev->kobj.parent, NULL);
if (error)
goto Error;
-dev->kobj は kobject 型
--[[linux-2.6.33/kobject_add()]]
--[[linux-2.6.33/kobject]]
/* notify platform of device entry */
if (platform_notify)
platform_notify(dev);
-
--[[linux-2.6.33/platform_notify()]]
error = device_create_file(dev, &uevent_attr);
if (error)
goto attrError;
-
--[[linux-2.6.33/device_create_file()]]
if (MAJOR(dev->devt)) {
error = device_create_file(dev, &devt_attr);
if (error)
goto ueventattrError;
error = device_create_sys_dev_entry(dev);
if (error)
goto devtattrError;
-dev->devt は dev_t 型
--[[linux-2.6.33/dev_t]]
-
--[[linux-2.6.33/MAJOR()]]
-
--[[linux-2.6.33/device_create_sys_dev_entry()]]
devtmpfs_create_node(dev);
-
--[[linux-2.6.33/devtmpfs_create_node()]]
}
error = device_add_class_symlinks(dev);
if (error)
goto SymlinkError;
-
--[[linux-2.6.33/device_add_class_symlinks()]]
error = device_add_attrs(dev);
if (error)
goto AttrsError;
-
--[[linux-2.6.33/device_add_attrs()]]
error = bus_add_device(dev);
if (error)
goto BusError;
-
--[[linux-2.6.33/bus_add_device()]]
error = dpm_sysfs_add(dev);
if (error)
goto DPMError;
-
--[[linux-2.6.33/dpm_sysfs_add()]]
device_pm_add(dev);
-
--[[linux-2.6.33/device_pm_add()]]
/* Notify clients of device addition. This call must c...
* after dpm_sysf_add() and before kobject_uevent().
*/
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_ADD_DEVICE, dev);
-dev->bus は struct bus_type 型
--[[linux-2.6.33/bus_type]]
-
--[[linux-2.6.33/blocking_notifier_call_chain()]]
kobject_uevent(&dev->kobj, KOBJ_ADD);
bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
&parent->p->klist_children);
-
--[[linux-2.6.33/kobject_uevent()]]
-
--[[linux-2.6.33/bus_probe_device()]]
-
--[[linux-2.6.33/klist_add_tail()]]
if (dev->class) {
mutex_lock(&dev->class->p->class_mutex);
/* tie the class to the device */
klist_add_tail(&dev->knode_class,
&dev->class->p->class_devices);
-dev->class は struct class 型
--[[linux-2.6.33/class]]
-
--[[linux-2.6.33/mutex_lock()]]
-
--[[linux-2.6.33/klist_add_tail()]]
/* notify any interfaces that the device is here */
list_for_each_entry(class_intf,
&dev->class->p->class_interfaces, node)
if (class_intf->add_dev)
class_intf->add_dev(dev, class_intf);
mutex_unlock(&dev->class->p->class_mutex);
-
--[[linux-2.6.33/list_for_each_entry()]]
-class_intf は struct class_interface * 型のローカル変数
--[[linux-2.6.33/class_interface]]
-
--[[linux-2.6.33/mutex_unlock()]]
}
done:
put_device(dev);
return error;
-
--[[linux-2.6.33/put_device()]]
DPMError:
bus_remove_device(dev);
-
--[[linux-2.6.33/bus_remove_device()]]
BusError:
device_remove_attrs(dev);
-
--[[linux-2.6.33/device_remove_attrs()]]
AttrsError:
device_remove_class_symlinks(dev);
-
--[[linux-2.6.33/device_remove_class_symlinks()]]
SymlinkError:
if (MAJOR(dev->devt))
devtmpfs_delete_node(dev);
if (MAJOR(dev->devt))
device_remove_sys_dev_entry(dev);
-
--[[linux-2.6.33/devtmpfs_delete_node()]]
-
--[[linux-2.6.33/device_remove_sys_dev_entry()]]
devtattrError:
if (MAJOR(dev->devt))
device_remove_file(dev, &devt_attr);
-
--[[linux-2.6.33/device_remove_file()]]
ueventattrError:
device_remove_file(dev, &uevent_attr);
-
--[[linux-2.6.33/device_remove_file()]]
attrError:
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
kobject_del(&dev->kobj);
-
--[[linux-2.6.33/kobject_uevent()]]
-
--[[linux-2.6.33/kobject_del()]]
Error:
cleanup_device_parent(dev);
if (parent)
put_device(parent);
-
--[[linux-2.6.33/cleanup_device_parent()]]
-
--[[linux-2.6.33/put_device()]]
name_error:
kfree(dev->p);
dev->p = NULL;
goto done;
-
--[[linux-2.6.33/kfree()]]
}
*コメント [#j25eb8c6]
終了行:
*参照元 [#vb5dea8c]
#backlinks
*説明 [#c5a2de98]
-パス: [[linux-2.6.33/drivers/base/core.c]]
-FIXME: これは何？
--説明
**引数 [#n102b8bd]
-struct device *dev
--
--[[linux-2.6.33/device]]
**返り値 [#acebff9f]
-int
--0: 成功、0 以外: 失敗
--通例として失敗時はエラー番号を負の値で返す（-EINVAL な...
--[[linux-2.6.33/include/linux/errno.h]]
**参考 [#h2017505]
*実装 [#ibebcae1]
/**
* device_add - add device to device hierarchy.
* @dev: device.
*
* This is part 2 of device_register(), though may be ca...
* separately _iff_ device_initialize() has been called ...
*
* This adds @dev to the kobject hierarchy via kobject_a...
* to the global and sibling lists for the device, then
* adds it to the other relevant subsystems of the drive...
*
* NOTE: _Never_ directly free @dev after calling this f...
* if it returned an error! Always use put_device() to g...
* reference instead.
*/
int device_add(struct device *dev)
{
struct device *parent = NULL;
struct class_interface *class_intf;
-
--[[linux-2.6.33/device]]
-
--[[linux-2.6.33/class_interface]]
int error = -EINVAL;
dev = get_device(dev);
if (!dev)
goto done;
-
--[[linux-2.6.33/get_device()]]
if (!dev->p) {
error = device_private_init(dev);
if (error)
goto done;
}
-dev->p は struct device_private 型
--[[linux-2.6.33/device_private]]
-
--[[linux-2.6.33/device_private_init()]]
/*
* for statically allocated devices, which should all b...
* some day, we need to initialize the name. We prevent...
* the name, and force the use of dev_name()
*/
if (dev->init_name) {
dev_set_name(dev, "%s", dev->init_name);
dev->init_name = NULL;
}
-
--[[linux-2.6.33/dev_set_name()]]
if (!dev_name(dev)) {
error = -EINVAL;
goto name_error;
}
-
--[[linux-2.6.33/dev_name()]]
pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
-
--[[linux-2.6.33/pr_debug()]]
parent = get_device(dev->parent);
setup_parent(dev, parent);
-
--[[linux-2.6.33/get_device()]]
-
--[[linux-2.6.33/setup_parent()]]
/* use parent numa_node */
if (parent)
set_dev_node(dev, dev_to_node(parent));
-
--[[linux-2.6.33/set_dev_node()]]
--[[linux-2.6.33/dev_to_node()]]
/* first, register with generic layer. */
/* we require the name to be set before, and pass NULL */
error = kobject_add(&dev->kobj, dev->kobj.parent, NULL);
if (error)
goto Error;
-dev->kobj は kobject 型
--[[linux-2.6.33/kobject_add()]]
--[[linux-2.6.33/kobject]]
/* notify platform of device entry */
if (platform_notify)
platform_notify(dev);
-
--[[linux-2.6.33/platform_notify()]]
error = device_create_file(dev, &uevent_attr);
if (error)
goto attrError;
-
--[[linux-2.6.33/device_create_file()]]
if (MAJOR(dev->devt)) {
error = device_create_file(dev, &devt_attr);
if (error)
goto ueventattrError;
error = device_create_sys_dev_entry(dev);
if (error)
goto devtattrError;
-dev->devt は dev_t 型
--[[linux-2.6.33/dev_t]]
-
--[[linux-2.6.33/MAJOR()]]
-
--[[linux-2.6.33/device_create_sys_dev_entry()]]
devtmpfs_create_node(dev);
-
--[[linux-2.6.33/devtmpfs_create_node()]]
}
error = device_add_class_symlinks(dev);
if (error)
goto SymlinkError;
-
--[[linux-2.6.33/device_add_class_symlinks()]]
error = device_add_attrs(dev);
if (error)
goto AttrsError;
-
--[[linux-2.6.33/device_add_attrs()]]
error = bus_add_device(dev);
if (error)
goto BusError;
-
--[[linux-2.6.33/bus_add_device()]]
error = dpm_sysfs_add(dev);
if (error)
goto DPMError;
-
--[[linux-2.6.33/dpm_sysfs_add()]]
device_pm_add(dev);
-
--[[linux-2.6.33/device_pm_add()]]
/* Notify clients of device addition. This call must c...
* after dpm_sysf_add() and before kobject_uevent().
*/
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_ADD_DEVICE, dev);
-dev->bus は struct bus_type 型
--[[linux-2.6.33/bus_type]]
-
--[[linux-2.6.33/blocking_notifier_call_chain()]]
kobject_uevent(&dev->kobj, KOBJ_ADD);
bus_probe_device(dev);
if (parent)
klist_add_tail(&dev->p->knode_parent,
&parent->p->klist_children);
-
--[[linux-2.6.33/kobject_uevent()]]
-
--[[linux-2.6.33/bus_probe_device()]]
-
--[[linux-2.6.33/klist_add_tail()]]
if (dev->class) {
mutex_lock(&dev->class->p->class_mutex);
/* tie the class to the device */
klist_add_tail(&dev->knode_class,
&dev->class->p->class_devices);
-dev->class は struct class 型
--[[linux-2.6.33/class]]
-
--[[linux-2.6.33/mutex_lock()]]
-
--[[linux-2.6.33/klist_add_tail()]]
/* notify any interfaces that the device is here */
list_for_each_entry(class_intf,
&dev->class->p->class_interfaces, node)
if (class_intf->add_dev)
class_intf->add_dev(dev, class_intf);
mutex_unlock(&dev->class->p->class_mutex);
-
--[[linux-2.6.33/list_for_each_entry()]]
-class_intf は struct class_interface * 型のローカル変数
--[[linux-2.6.33/class_interface]]
-
--[[linux-2.6.33/mutex_unlock()]]
}
done:
put_device(dev);
return error;
-
--[[linux-2.6.33/put_device()]]
DPMError:
bus_remove_device(dev);
-
--[[linux-2.6.33/bus_remove_device()]]
BusError:
device_remove_attrs(dev);
-
--[[linux-2.6.33/device_remove_attrs()]]
AttrsError:
device_remove_class_symlinks(dev);
-
--[[linux-2.6.33/device_remove_class_symlinks()]]
SymlinkError:
if (MAJOR(dev->devt))
devtmpfs_delete_node(dev);
if (MAJOR(dev->devt))
device_remove_sys_dev_entry(dev);
-
--[[linux-2.6.33/devtmpfs_delete_node()]]
-
--[[linux-2.6.33/device_remove_sys_dev_entry()]]
devtattrError:
if (MAJOR(dev->devt))
device_remove_file(dev, &devt_attr);
-
--[[linux-2.6.33/device_remove_file()]]
ueventattrError:
device_remove_file(dev, &uevent_attr);
-
--[[linux-2.6.33/device_remove_file()]]
attrError:
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
kobject_del(&dev->kobj);
-
--[[linux-2.6.33/kobject_uevent()]]
-
--[[linux-2.6.33/kobject_del()]]
Error:
cleanup_device_parent(dev);
if (parent)
put_device(parent);
-
--[[linux-2.6.33/cleanup_device_parent()]]
-
--[[linux-2.6.33/put_device()]]
name_error:
kfree(dev->p);
dev->p = NULL;
goto done;
-
--[[linux-2.6.33/kfree()]]
}
*コメント [#j25eb8c6]
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