#include <linux/string.h>
#include <linux/kdev_t.h>
#include <linux/notifier.h>
-
+#include <linux/genhd.h>
#include <asm/semaphore.h>
#include "base.h"
const char *dev_driver_string(struct device *dev)
{
return dev->driver ? dev->driver->name :
- (dev->bus ? dev->bus->name : "");
+ (dev->bus ? dev->bus->name :
+ (dev->class ? dev->class->name : ""));
}
EXPORT_SYMBOL(dev_driver_string);
}
}
-static struct kobj_type ktype_device = {
+static struct kobj_type device_ktype = {
.release = device_release,
.sysfs_ops = &dev_sysfs_ops,
};
{
struct kobj_type *ktype = get_ktype(kobj);
- if (ktype == &ktype_device) {
+ if (ktype == &device_ktype) {
struct device *dev = to_dev(kobj);
+ if (dev->uevent_suppress)
+ return 0;
if (dev->bus)
return 1;
if (dev->class)
return NULL;
}
-static int dev_uevent(struct kset *kset, struct kobject *kobj, char **envp,
- int num_envp, char *buffer, int buffer_size)
+static int dev_uevent(struct kset *kset, struct kobject *kobj,
+ struct kobj_uevent_env *env)
{
struct device *dev = to_dev(kobj);
- int i = 0;
- int length = 0;
int retval = 0;
/* add the major/minor if present */
if (MAJOR(dev->devt)) {
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "MAJOR=%u", MAJOR(dev->devt));
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "MINOR=%u", MINOR(dev->devt));
+ add_uevent_var(env, "MAJOR=%u", MAJOR(dev->devt));
+ add_uevent_var(env, "MINOR=%u", MINOR(dev->devt));
}
+ if (dev->type && dev->type->name)
+ add_uevent_var(env, "DEVTYPE=%s", dev->type->name);
+
if (dev->driver)
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "DRIVER=%s", dev->driver->name);
+ add_uevent_var(env, "DRIVER=%s", dev->driver->name);
#ifdef CONFIG_SYSFS_DEPRECATED
if (dev->class) {
const char *path;
path = kobject_get_path(&parent->kobj, GFP_KERNEL);
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PHYSDEVPATH=%s", path);
- kfree(path);
+ if (path) {
+ add_uevent_var(env, "PHYSDEVPATH=%s", path);
+ kfree(path);
+ }
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PHYSDEVBUS=%s", parent->bus->name);
+ add_uevent_var(env, "PHYSDEVBUS=%s", parent->bus->name);
if (parent->driver)
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PHYSDEVDRIVER=%s", parent->driver->name);
+ add_uevent_var(env, "PHYSDEVDRIVER=%s",
+ parent->driver->name);
}
} else if (dev->bus) {
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PHYSDEVBUS=%s", dev->bus->name);
+ add_uevent_var(env, "PHYSDEVBUS=%s", dev->bus->name);
if (dev->driver)
- add_uevent_var(envp, num_envp, &i,
- buffer, buffer_size, &length,
- "PHYSDEVDRIVER=%s", dev->driver->name);
+ add_uevent_var(env, "PHYSDEVDRIVER=%s", dev->driver->name);
}
#endif
- /* terminate, set to next free slot, shrink available space */
- envp[i] = NULL;
- envp = &envp[i];
- num_envp -= i;
- buffer = &buffer[length];
- buffer_size -= length;
-
+ /* have the bus specific function add its stuff */
if (dev->bus && dev->bus->uevent) {
- /* have the bus specific function add its stuff */
- retval = dev->bus->uevent(dev, envp, num_envp, buffer, buffer_size);
+ retval = dev->bus->uevent(dev, env);
if (retval)
- pr_debug ("%s: bus uevent() returned %d\n",
- __FUNCTION__, retval);
+ pr_debug("device: '%s': %s: bus uevent() returned %d\n",
+ dev->bus_id, __FUNCTION__, retval);
}
+ /* have the class specific function add its stuff */
if (dev->class && dev->class->dev_uevent) {
- /* have the class specific function add its stuff */
- retval = dev->class->dev_uevent(dev, envp, num_envp, buffer, buffer_size);
+ retval = dev->class->dev_uevent(dev, env);
if (retval)
- pr_debug("%s: class uevent() returned %d\n",
+ pr_debug("device: '%s': %s: class uevent() "
+ "returned %d\n", dev->bus_id,
__FUNCTION__, retval);
}
+ /* have the device type specific fuction add its stuff */
if (dev->type && dev->type->uevent) {
- /* have the device type specific fuction add its stuff */
- retval = dev->type->uevent(dev, envp, num_envp, buffer, buffer_size);
+ retval = dev->type->uevent(dev, env);
if (retval)
- pr_debug("%s: dev_type uevent() returned %d\n",
+ pr_debug("device: '%s': %s: dev_type uevent() "
+ "returned %d\n", dev->bus_id,
__FUNCTION__, retval);
}
.uevent = dev_uevent,
};
+static ssize_t show_uevent(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kobject *top_kobj;
+ struct kset *kset;
+ struct kobj_uevent_env *env = NULL;
+ int i;
+ size_t count = 0;
+ int retval;
+
+ /* search the kset, the device belongs to */
+ top_kobj = &dev->kobj;
+ while (!top_kobj->kset && top_kobj->parent)
+ top_kobj = top_kobj->parent;
+ if (!top_kobj->kset)
+ goto out;
+
+ kset = top_kobj->kset;
+ if (!kset->uevent_ops || !kset->uevent_ops->uevent)
+ goto out;
+
+ /* respect filter */
+ if (kset->uevent_ops && kset->uevent_ops->filter)
+ if (!kset->uevent_ops->filter(kset, &dev->kobj))
+ goto out;
+
+ env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL);
+ if (!env)
+ return -ENOMEM;
+
+ /* let the kset specific function add its keys */
+ retval = kset->uevent_ops->uevent(kset, &dev->kobj, env);
+ if (retval)
+ goto out;
+
+ /* copy keys to file */
+ for (i = 0; i < env->envp_idx; i++)
+ count += sprintf(&buf[count], "%s\n", env->envp[i]);
+out:
+ kfree(env);
+ return count;
+}
+
static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
+ enum kobject_action action;
+
+ if (kobject_action_type(buf, count, &action) == 0) {
+ kobject_uevent(&dev->kobj, action);
+ goto out;
+ }
+
+ dev_err(dev, "uevent: unsupported action-string; this will "
+ "be ignored in a future kernel version\n");
kobject_uevent(&dev->kobj, KOBJ_ADD);
+out:
return count;
}
-static int device_add_groups(struct device *dev)
+static struct device_attribute uevent_attr =
+ __ATTR(uevent, S_IRUGO | S_IWUSR, show_uevent, store_uevent);
+
+static int device_add_attributes(struct device *dev,
+ struct device_attribute *attrs)
{
+ int error = 0;
int i;
+
+ if (attrs) {
+ for (i = 0; attr_name(attrs[i]); i++) {
+ error = device_create_file(dev, &attrs[i]);
+ if (error)
+ break;
+ }
+ if (error)
+ while (--i >= 0)
+ device_remove_file(dev, &attrs[i]);
+ }
+ return error;
+}
+
+static void device_remove_attributes(struct device *dev,
+ struct device_attribute *attrs)
+{
+ int i;
+
+ if (attrs)
+ for (i = 0; attr_name(attrs[i]); i++)
+ device_remove_file(dev, &attrs[i]);
+}
+
+static int device_add_groups(struct device *dev,
+ struct attribute_group **groups)
+{
int error = 0;
+ int i;
- if (dev->groups) {
- for (i = 0; dev->groups[i]; i++) {
- error = sysfs_create_group(&dev->kobj, dev->groups[i]);
+ if (groups) {
+ for (i = 0; groups[i]; i++) {
+ error = sysfs_create_group(&dev->kobj, groups[i]);
if (error) {
while (--i >= 0)
- sysfs_remove_group(&dev->kobj, dev->groups[i]);
- goto out;
+ sysfs_remove_group(&dev->kobj, groups[i]);
+ break;
}
}
}
-out:
return error;
}
-static void device_remove_groups(struct device *dev)
+static void device_remove_groups(struct device *dev,
+ struct attribute_group **groups)
{
int i;
- if (dev->groups) {
- for (i = 0; dev->groups[i]; i++) {
- sysfs_remove_group(&dev->kobj, dev->groups[i]);
- }
- }
+
+ if (groups)
+ for (i = 0; groups[i]; i++)
+ sysfs_remove_group(&dev->kobj, groups[i]);
}
static int device_add_attrs(struct device *dev)
{
struct class *class = dev->class;
struct device_type *type = dev->type;
- int error = 0;
- int i;
+ int error;
- if (class && class->dev_attrs) {
- for (i = 0; attr_name(class->dev_attrs[i]); i++) {
- error = device_create_file(dev, &class->dev_attrs[i]);
- if (error)
- break;
- }
+ if (class) {
+ error = device_add_attributes(dev, class->dev_attrs);
if (error)
- while (--i >= 0)
- device_remove_file(dev, &class->dev_attrs[i]);
+ return error;
}
- if (type && type->attrs) {
- for (i = 0; attr_name(type->attrs[i]); i++) {
- error = device_create_file(dev, &type->attrs[i]);
- if (error)
- break;
- }
+ if (type) {
+ error = device_add_groups(dev, type->groups);
if (error)
- while (--i >= 0)
- device_remove_file(dev, &type->attrs[i]);
+ goto err_remove_class_attrs;
}
+ error = device_add_groups(dev, dev->groups);
+ if (error)
+ goto err_remove_type_groups;
+
+ return 0;
+
+ err_remove_type_groups:
+ if (type)
+ device_remove_groups(dev, type->groups);
+ err_remove_class_attrs:
+ if (class)
+ device_remove_attributes(dev, class->dev_attrs);
+
return error;
}
{
struct class *class = dev->class;
struct device_type *type = dev->type;
- int i;
- if (class && class->dev_attrs) {
- for (i = 0; attr_name(class->dev_attrs[i]); i++)
- device_remove_file(dev, &class->dev_attrs[i]);
- }
+ device_remove_groups(dev, dev->groups);
- if (type && type->attrs) {
- for (i = 0; attr_name(type->attrs[i]); i++)
- device_remove_file(dev, &type->attrs[i]);
- }
+ if (type)
+ device_remove_groups(dev, type->groups);
+
+ if (class)
+ device_remove_attributes(dev, class->dev_attrs);
}
return print_dev_t(buf, dev->devt);
}
-/*
- * devices_subsys - structure to be registered with kobject core.
- */
+static struct device_attribute devt_attr =
+ __ATTR(dev, S_IRUGO, show_dev, NULL);
-decl_subsys(devices, &ktype_device, &device_uevent_ops);
+/* kset to create /sys/devices/ */
+struct kset *devices_kset;
/**
EXPORT_SYMBOL_GPL(device_remove_bin_file);
/**
- * device_schedule_callback - helper to schedule a callback for a device
+ * device_schedule_callback_owner - helper to schedule a callback for a device
* @dev: device.
* @func: callback function to invoke later.
+ * @owner: module owning the callback routine
*
* Attribute methods must not unregister themselves or their parent device
* (which would amount to the same thing). Attempts to do so will deadlock,
* argument in the workqueue's process context. @dev will be pinned until
* @func returns.
*
+ * This routine is usually called via the inline device_schedule_callback(),
+ * which automatically sets @owner to THIS_MODULE.
+ *
* Returns 0 if the request was submitted, -ENOMEM if storage could not
- * be allocated.
+ * be allocated, -ENODEV if a reference to @owner isn't available.
*
* NOTE: This routine won't work if CONFIG_SYSFS isn't set! It uses an
* underlying sysfs routine (since it is intended for use by attribute
* methods), and if sysfs isn't available you'll get nothing but -ENOSYS.
*/
-int device_schedule_callback(struct device *dev,
- void (*func)(struct device *))
+int device_schedule_callback_owner(struct device *dev,
+ void (*func)(struct device *), struct module *owner)
{
return sysfs_schedule_callback(&dev->kobj,
- (void (*)(void *)) func, dev);
+ (void (*)(void *)) func, dev, owner);
}
-EXPORT_SYMBOL_GPL(device_schedule_callback);
+EXPORT_SYMBOL_GPL(device_schedule_callback_owner);
static void klist_children_get(struct klist_node *n)
{
void device_initialize(struct device *dev)
{
- kobj_set_kset_s(dev, devices_subsys);
- kobject_init(&dev->kobj);
+ dev->kobj.kset = devices_kset;
+ kobject_init_ng(&dev->kobj, &device_ktype);
klist_init(&dev->klist_children, klist_children_get,
klist_children_put);
INIT_LIST_HEAD(&dev->dma_pools);
}
#ifdef CONFIG_SYSFS_DEPRECATED
-static struct kobject * get_device_parent(struct device *dev,
- struct device *parent)
+static struct kobject *get_device_parent(struct device *dev,
+ struct device *parent)
{
- /* Set the parent to the class, not the parent device */
- /* this keeps sysfs from having a symlink to make old udevs happy */
- if (dev->class)
- return &dev->class->subsys.kset.kobj;
+ /* class devices without a parent live in /sys/class/<classname>/ */
+ if (dev->class && (!parent || parent->class != dev->class))
+ return &dev->class->subsys.kobj;
+ /* all other devices keep their parent */
else if (parent)
return &parent->kobj;
return NULL;
}
+
+static inline void cleanup_device_parent(struct device *dev) {}
#else
-static struct kobject * virtual_device_parent(struct device *dev)
+static struct kobject *virtual_device_parent(struct device *dev)
{
- if (!dev->class)
- return ERR_PTR(-ENODEV);
+ static struct kobject *virtual_dir = NULL;
- if (!dev->class->virtual_dir) {
- static struct kobject *virtual_dir = NULL;
+ if (!virtual_dir)
+ virtual_dir = kobject_create_and_add("virtual",
+ &devices_kset->kobj);
- if (!virtual_dir)
- virtual_dir = kobject_add_dir(&devices_subsys.kset.kobj, "virtual");
- dev->class->virtual_dir = kobject_add_dir(virtual_dir, dev->class->name);
- }
-
- return dev->class->virtual_dir;
+ return virtual_dir;
}
-static struct kobject * get_device_parent(struct device *dev,
- struct device *parent)
+static struct kobject *get_device_parent(struct device *dev,
+ struct device *parent)
{
- /* if this is a class device, and has no parent, create one */
- if ((dev->class) && (parent == NULL)) {
- return virtual_device_parent(dev);
- } else if (parent)
+ int retval;
+
+ if (dev->class) {
+ struct kobject *kobj = NULL;
+ struct kobject *parent_kobj;
+ struct kobject *k;
+
+ /*
+ * If we have no parent, we live in "virtual".
+ * Class-devices with a bus-device as parent, live
+ * in a class-directory to prevent namespace collisions.
+ */
+ if (parent == NULL)
+ parent_kobj = virtual_device_parent(dev);
+ else if (parent->class)
+ return &parent->kobj;
+ else
+ parent_kobj = &parent->kobj;
+
+ /* find our class-directory at the parent and reference it */
+ spin_lock(&dev->class->class_dirs.list_lock);
+ list_for_each_entry(k, &dev->class->class_dirs.list, entry)
+ if (k->parent == parent_kobj) {
+ kobj = kobject_get(k);
+ break;
+ }
+ spin_unlock(&dev->class->class_dirs.list_lock);
+ if (kobj)
+ return kobj;
+
+ /* or create a new class-directory at the parent device */
+ k = kobject_create();
+ if (!k)
+ return NULL;
+ k->kset = &dev->class->class_dirs;
+ retval = kobject_add_ng(k, parent_kobj, "%s", dev->class->name);
+ if (retval < 0) {
+ kobject_put(k);
+ return NULL;
+ }
+ /* Do not emit a uevent, as it's not needed for this
+ * "class glue" directory. */
+ return k;
+ }
+
+ if (parent)
return &parent->kobj;
return NULL;
}
+static void cleanup_device_parent(struct device *dev)
+{
+ struct device *d;
+ int other = 0;
+
+ if (!dev->class)
+ return;
+
+ /* see if we live in a parent class directory */
+ if (dev->kobj.parent->kset != &dev->class->class_dirs)
+ return;
+
+ /* if we are the last child of our class, delete the directory */
+ down(&dev->class->sem);
+ list_for_each_entry(d, &dev->class->devices, node) {
+ if (d == dev)
+ continue;
+ if (d->kobj.parent == dev->kobj.parent) {
+ other = 1;
+ break;
+ }
+ }
+ if (!other)
+ kobject_del(dev->kobj.parent);
+ kobject_put(dev->kobj.parent);
+ up(&dev->class->sem);
+}
#endif
+
static int setup_parent(struct device *dev, struct device *parent)
{
struct kobject *kobj;
return 0;
}
+static int device_add_class_symlinks(struct device *dev)
+{
+ int error;
+
+ if (!dev->class)
+ return 0;
+
+ error = sysfs_create_link(&dev->kobj, &dev->class->subsys.kobj,
+ "subsystem");
+ if (error)
+ goto out;
+
+#ifdef CONFIG_SYSFS_DEPRECATED
+ /* stacked class devices need a symlink in the class directory */
+ if (dev->kobj.parent != &dev->class->subsys.kobj &&
+ dev->type != &part_type) {
+ error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
+ dev->bus_id);
+ if (error)
+ goto out_subsys;
+ }
+
+ if (dev->parent && dev->type != &part_type) {
+ struct device *parent = dev->parent;
+ char *class_name;
+
+ /*
+ * stacked class devices have the 'device' link
+ * pointing to the bus device instead of the parent
+ */
+ while (parent->class && !parent->bus && parent->parent)
+ parent = parent->parent;
+
+ error = sysfs_create_link(&dev->kobj,
+ &parent->kobj,
+ "device");
+ if (error)
+ goto out_busid;
+
+ class_name = make_class_name(dev->class->name,
+ &dev->kobj);
+ if (class_name)
+ error = sysfs_create_link(&dev->parent->kobj,
+ &dev->kobj, class_name);
+ kfree(class_name);
+ if (error)
+ goto out_device;
+ }
+ return 0;
+
+out_device:
+ if (dev->parent && dev->type != &part_type)
+ sysfs_remove_link(&dev->kobj, "device");
+out_busid:
+ if (dev->kobj.parent != &dev->class->subsys.kobj &&
+ dev->type != &part_type)
+ sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#else
+ /* link in the class directory pointing to the device */
+ error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
+ dev->bus_id);
+ if (error)
+ goto out_subsys;
+
+ if (dev->parent && dev->type != &part_type) {
+ error = sysfs_create_link(&dev->kobj, &dev->parent->kobj,
+ "device");
+ if (error)
+ goto out_busid;
+ }
+ return 0;
+
+out_busid:
+ sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#endif
+
+out_subsys:
+ sysfs_remove_link(&dev->kobj, "subsystem");
+out:
+ return error;
+}
+
+static void device_remove_class_symlinks(struct device *dev)
+{
+ if (!dev->class)
+ return;
+
+#ifdef CONFIG_SYSFS_DEPRECATED
+ if (dev->parent && dev->type != &part_type) {
+ char *class_name;
+
+ class_name = make_class_name(dev->class->name, &dev->kobj);
+ if (class_name) {
+ sysfs_remove_link(&dev->parent->kobj, class_name);
+ kfree(class_name);
+ }
+ sysfs_remove_link(&dev->kobj, "device");
+ }
+
+ if (dev->kobj.parent != &dev->class->subsys.kobj &&
+ dev->type != &part_type)
+ sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#else
+ if (dev->parent && dev->type != &part_type)
+ sysfs_remove_link(&dev->kobj, "device");
+
+ sysfs_remove_link(&dev->class->subsys.kobj, dev->bus_id);
+#endif
+
+ sysfs_remove_link(&dev->kobj, "subsystem");
+}
+
/**
* device_add - add device to device hierarchy.
* @dev: device.
* This is part 2 of device_register(), though may be called
* separately _iff_ device_initialize() has been called separately.
*
- * This adds it to the kobject hierarchy via kobject_add(), adds it
+ * This adds it to the kobject hierarchy via kobject_add_ng(), adds it
* to the global and sibling lists for the device, then
* adds it to the other relevant subsystems of the driver model.
*/
int device_add(struct device *dev)
{
struct device *parent = NULL;
- char *class_name = NULL;
struct class_interface *class_intf;
- int error = -EINVAL;
+ int error;
+
+ error = pm_sleep_lock();
+ if (error) {
+ dev_warn(dev, "Suspicious %s during suspend\n", __FUNCTION__);
+ dump_stack();
+ return error;
+ }
dev = get_device(dev);
- if (!dev || !strlen(dev->bus_id))
+ if (!dev || !strlen(dev->bus_id)) {
+ error = -EINVAL;
goto Error;
+ }
- pr_debug("DEV: registering device: ID = '%s'\n", dev->bus_id);
+ pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
parent = get_device(dev->parent);
-
error = setup_parent(dev, parent);
if (error)
goto Error;
/* first, register with generic layer. */
- kobject_set_name(&dev->kobj, "%s", dev->bus_id);
- error = kobject_add(&dev->kobj);
+ error = kobject_add_ng(&dev->kobj, dev->kobj.parent, "%s", dev->bus_id);
if (error)
goto Error;
/* notify clients of device entry (new way) */
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_ADD_DEVICE, dev);
- dev->uevent_attr.attr.name = "uevent";
- dev->uevent_attr.attr.mode = S_IWUSR;
- if (dev->driver)
- dev->uevent_attr.attr.owner = dev->driver->owner;
- dev->uevent_attr.store = store_uevent;
- error = device_create_file(dev, &dev->uevent_attr);
+ error = device_create_file(dev, &uevent_attr);
if (error)
goto attrError;
if (MAJOR(dev->devt)) {
- struct device_attribute *attr;
- attr = kzalloc(sizeof(*attr), GFP_KERNEL);
- if (!attr) {
- error = -ENOMEM;
- goto ueventattrError;
- }
- attr->attr.name = "dev";
- attr->attr.mode = S_IRUGO;
- if (dev->driver)
- attr->attr.owner = dev->driver->owner;
- attr->show = show_dev;
- error = device_create_file(dev, attr);
- if (error) {
- kfree(attr);
+ error = device_create_file(dev, &devt_attr);
+ if (error)
goto ueventattrError;
- }
-
- dev->devt_attr = attr;
}
- if (dev->class) {
- sysfs_create_link(&dev->kobj, &dev->class->subsys.kset.kobj,
- "subsystem");
- /* If this is not a "fake" compatible device, then create the
- * symlink from the class to the device. */
- if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
- sysfs_create_link(&dev->class->subsys.kset.kobj,
- &dev->kobj, dev->bus_id);
- if (parent) {
- sysfs_create_link(&dev->kobj, &dev->parent->kobj,
- "device");
-#ifdef CONFIG_SYSFS_DEPRECATED
- class_name = make_class_name(dev->class->name,
- &dev->kobj);
- if (class_name)
- sysfs_create_link(&dev->parent->kobj,
- &dev->kobj, class_name);
-#endif
- }
- }
-
- if ((error = device_add_attrs(dev)))
+ error = device_add_class_symlinks(dev);
+ if (error)
+ goto SymlinkError;
+ error = device_add_attrs(dev);
+ if (error)
goto AttrsError;
- if ((error = device_add_groups(dev)))
- goto GroupError;
- if ((error = device_pm_add(dev)))
+ error = dpm_sysfs_add(dev);
+ if (error)
goto PMError;
- if ((error = bus_add_device(dev)))
+ device_pm_add(dev);
+ error = bus_add_device(dev);
+ if (error)
goto BusError;
- if (!dev->uevent_suppress)
- kobject_uevent(&dev->kobj, KOBJ_ADD);
- if ((error = bus_attach_device(dev)))
- goto AttachError;
+ kobject_uevent(&dev->kobj, KOBJ_ADD);
+ bus_attach_device(dev);
if (parent)
klist_add_tail(&dev->knode_parent, &parent->klist_children);
up(&dev->class->sem);
}
Done:
- kfree(class_name);
put_device(dev);
+ pm_sleep_unlock();
return error;
- AttachError:
- bus_remove_device(dev);
BusError:
device_pm_remove(dev);
+ dpm_sysfs_remove(dev);
PMError:
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
- device_remove_groups(dev);
- GroupError:
device_remove_attrs(dev);
AttrsError:
- if (dev->devt_attr) {
- device_remove_file(dev, dev->devt_attr);
- kfree(dev->devt_attr);
- }
-
- if (dev->class) {
- sysfs_remove_link(&dev->kobj, "subsystem");
- /* If this is not a "fake" compatible device, remove the
- * symlink from the class to the device. */
- if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
- sysfs_remove_link(&dev->class->subsys.kset.kobj,
- dev->bus_id);
- if (parent) {
-#ifdef CONFIG_SYSFS_DEPRECATED
- char *class_name = make_class_name(dev->class->name,
- &dev->kobj);
- if (class_name)
- sysfs_remove_link(&dev->parent->kobj,
- class_name);
- kfree(class_name);
-#endif
- sysfs_remove_link(&dev->kobj, "device");
- }
-
- down(&dev->class->sem);
- /* notify any interfaces that the device is now gone */
- list_for_each_entry(class_intf, &dev->class->interfaces, node)
- if (class_intf->remove_dev)
- class_intf->remove_dev(dev, class_intf);
- /* remove the device from the class list */
- list_del_init(&dev->node);
- up(&dev->class->sem);
- }
+ device_remove_class_symlinks(dev);
+ SymlinkError:
+ if (MAJOR(dev->devt))
+ device_remove_file(dev, &devt_attr);
ueventattrError:
- device_remove_file(dev, &dev->uevent_attr);
+ device_remove_file(dev, &uevent_attr);
attrError:
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
kobject_del(&dev->kobj);
*/
void put_device(struct device * dev)
{
+ /* might_sleep(); */
if (dev)
kobject_put(&dev->kobj);
}
struct device * parent = dev->parent;
struct class_interface *class_intf;
+ device_pm_remove(dev);
if (parent)
klist_del(&dev->knode_parent);
- if (dev->devt_attr) {
- device_remove_file(dev, dev->devt_attr);
- kfree(dev->devt_attr);
- }
+ if (MAJOR(dev->devt))
+ device_remove_file(dev, &devt_attr);
if (dev->class) {
- sysfs_remove_link(&dev->kobj, "subsystem");
- /* If this is not a "fake" compatible device, remove the
- * symlink from the class to the device. */
- if (dev->kobj.parent != &dev->class->subsys.kset.kobj)
- sysfs_remove_link(&dev->class->subsys.kset.kobj,
- dev->bus_id);
- if (parent) {
-#ifdef CONFIG_SYSFS_DEPRECATED
- char *class_name = make_class_name(dev->class->name,
- &dev->kobj);
- if (class_name)
- sysfs_remove_link(&dev->parent->kobj,
- class_name);
- kfree(class_name);
-#endif
- sysfs_remove_link(&dev->kobj, "device");
- }
+ device_remove_class_symlinks(dev);
down(&dev->class->sem);
/* notify any interfaces that the device is now gone */
list_del_init(&dev->node);
up(&dev->class->sem);
}
- device_remove_file(dev, &dev->uevent_attr);
- device_remove_groups(dev);
+ device_remove_file(dev, &uevent_attr);
device_remove_attrs(dev);
bus_remove_device(dev);
if (platform_notify_remove)
platform_notify_remove(dev);
if (dev->bus)
- blocking_notifier_call_chain(&dev->bus->bus_notifier,
+ blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
- device_pm_remove(dev);
kobject_uevent(&dev->kobj, KOBJ_REMOVE);
+ cleanup_device_parent(dev);
kobject_del(&dev->kobj);
- if (parent)
- put_device(parent);
+ put_device(parent);
}
/**
*/
void device_unregister(struct device * dev)
{
- pr_debug("DEV: Unregistering device. ID = '%s'\n", dev->bus_id);
+ pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
device_del(dev);
put_device(dev);
}
int __init devices_init(void)
{
- return subsystem_register(&devices_subsys);
+ devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL);
+ if (!devices_kset)
+ return -ENOMEM;
+ return 0;
}
EXPORT_SYMBOL_GPL(device_for_each_child);
static void device_create_release(struct device *dev)
{
- pr_debug("%s called for %s\n", __FUNCTION__, dev->bus_id);
+ pr_debug("device: '%s': %s\n", dev->bus_id, __FUNCTION__);
kfree(dev);
}
EXPORT_SYMBOL_GPL(device_create);
/**
- * device_destroy - removes a device that was created with device_create()
+ * find_device - finds a device that was created with device_create()
* @class: pointer to the struct class that this device was registered with
* @devt: the dev_t of the device that was previously registered
- *
- * This call unregisters and cleans up a device that was created with a
- * call to device_create().
*/
-void device_destroy(struct class *class, dev_t devt)
+static struct device *find_device(struct class *class, dev_t devt)
{
struct device *dev = NULL;
struct device *dev_tmp;
}
}
up(&class->sem);
+ return dev;
+}
+/**
+ * device_destroy - removes a device that was created with device_create()
+ * @class: pointer to the struct class that this device was registered with
+ * @devt: the dev_t of the device that was previously registered
+ *
+ * This call unregisters and cleans up a device that was created with a
+ * call to device_create().
+ */
+void device_destroy(struct class *class, dev_t devt)
+{
+ struct device *dev;
+
+ dev = find_device(class, devt);
if (dev)
device_unregister(dev);
}
EXPORT_SYMBOL_GPL(device_destroy);
+#ifdef CONFIG_PM_SLEEP
+/**
+ * destroy_suspended_device - asks the PM core to remove a suspended device
+ * @class: pointer to the struct class that this device was registered with
+ * @devt: the dev_t of the device that was previously registered
+ *
+ * This call notifies the PM core of the necessity to unregister a suspended
+ * device created with a call to device_create() (devices cannot be
+ * unregistered directly while suspended, since the PM core holds their
+ * semaphores at that time).
+ *
+ * It can only be called within the scope of a system sleep transition. In
+ * practice this means it has to be directly or indirectly invoked either by
+ * a suspend or resume method, or by the PM core (e.g. via
+ * disable_nonboot_cpus() or enable_nonboot_cpus()).
+ */
+void destroy_suspended_device(struct class *class, dev_t devt)
+{
+ struct device *dev;
+
+ dev = find_device(class, devt);
+ if (dev)
+ device_pm_schedule_removal(dev);
+}
+EXPORT_SYMBOL_GPL(destroy_suspended_device);
+#endif /* CONFIG_PM_SLEEP */
+
/**
* device_rename - renames a device
* @dev: the pointer to the struct device to be renamed
{
char *old_class_name = NULL;
char *new_class_name = NULL;
- char *old_symlink_name = NULL;
+ char *old_device_name = NULL;
int error;
dev = get_device(dev);
if (!dev)
return -EINVAL;
- pr_debug("DEVICE: renaming '%s' to '%s'\n", dev->bus_id, new_name);
+ pr_debug("device: '%s': %s: renaming to '%s'\n", dev->bus_id,
+ __FUNCTION__, new_name);
#ifdef CONFIG_SYSFS_DEPRECATED
if ((dev->class) && (dev->parent))
old_class_name = make_class_name(dev->class->name, &dev->kobj);
#endif
- if (dev->class) {
- old_symlink_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
- if (!old_symlink_name) {
- error = -ENOMEM;
- goto out_free_old_class;
- }
- strlcpy(old_symlink_name, dev->bus_id, BUS_ID_SIZE);
+ old_device_name = kmalloc(BUS_ID_SIZE, GFP_KERNEL);
+ if (!old_device_name) {
+ error = -ENOMEM;
+ goto out;
}
-
+ strlcpy(old_device_name, dev->bus_id, BUS_ID_SIZE);
strlcpy(dev->bus_id, new_name, BUS_ID_SIZE);
error = kobject_rename(&dev->kobj, new_name);
+ if (error) {
+ strlcpy(dev->bus_id, old_device_name, BUS_ID_SIZE);
+ goto out;
+ }
#ifdef CONFIG_SYSFS_DEPRECATED
if (old_class_name) {
new_class_name = make_class_name(dev->class->name, &dev->kobj);
if (new_class_name) {
- sysfs_create_link(&dev->parent->kobj, &dev->kobj,
- new_class_name);
+ error = sysfs_create_link(&dev->parent->kobj,
+ &dev->kobj, new_class_name);
+ if (error)
+ goto out;
sysfs_remove_link(&dev->parent->kobj, old_class_name);
}
}
-#endif
-
+#else
if (dev->class) {
- sysfs_remove_link(&dev->class->subsys.kset.kobj,
- old_symlink_name);
- sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
- dev->bus_id);
+ sysfs_remove_link(&dev->class->subsys.kobj, old_device_name);
+ error = sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
+ dev->bus_id);
+ if (error) {
+ dev_err(dev, "%s: sysfs_create_symlink failed (%d)\n",
+ __FUNCTION__, error);
+ }
}
+#endif
+
+out:
put_device(dev);
kfree(new_class_name);
- kfree(old_symlink_name);
- out_free_old_class:
kfree(old_class_name);
+ kfree(old_device_name);
return error;
}
put_device(new_parent);
goto out;
}
- pr_debug("DEVICE: moving '%s' to '%s'\n", dev->bus_id,
- new_parent ? new_parent->bus_id : "<NULL>");
+ pr_debug("device: '%s': %s: moving to '%s'\n", dev->bus_id,
+ __FUNCTION__, new_parent ? new_parent->bus_id : "<NULL>");
error = kobject_move(&dev->kobj, new_parent_kobj);
if (error) {
put_device(new_parent);
put_device(dev);
return error;
}
-
EXPORT_SYMBOL_GPL(device_move);
+
+/**
+ * device_shutdown - call ->shutdown() on each device to shutdown.
+ */
+void device_shutdown(void)
+{
+ struct device * dev, *devn;
+
+ list_for_each_entry_safe_reverse(dev, devn, &devices_kset->list,
+ kobj.entry) {
+ if (dev->bus && dev->bus->shutdown) {
+ dev_dbg(dev, "shutdown\n");
+ dev->bus->shutdown(dev);
+ } else if (dev->driver && dev->driver->shutdown) {
+ dev_dbg(dev, "shutdown\n");
+ dev->driver->shutdown(dev);
+ }
+ }
+}
Code Review / linux-3.10.git / blobdiff