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drivers/base/core.c
47.7 KB
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/* * drivers/base/core.c - core driver model code (device registration, etc) * * Copyright (c) 2002-3 Patrick Mochel * Copyright (c) 2002-3 Open Source Development Labs |
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* Copyright (c) 2006 Greg Kroah-Hartman <gregkh@suse.de> * Copyright (c) 2006 Novell, Inc. |
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* * This file is released under the GPLv2 * */ |
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#include <linux/device.h> #include <linux/err.h> #include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/string.h> |
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#include <linux/kdev_t.h> |
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#include <linux/notifier.h> |
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#include <linux/genhd.h> |
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#include <linux/kallsyms.h> |
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#include <linux/mutex.h> |
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#include <linux/async.h> |
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#include <linux/pm_runtime.h> |
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#include "base.h" #include "power/power.h" |
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#ifdef CONFIG_SYSFS_DEPRECATED #ifdef CONFIG_SYSFS_DEPRECATED_V2 long sysfs_deprecated = 1; #else long sysfs_deprecated = 0; #endif static __init int sysfs_deprecated_setup(char *arg) { return strict_strtol(arg, 10, &sysfs_deprecated); } early_param("sysfs.deprecated", sysfs_deprecated_setup); #endif |
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int (*platform_notify)(struct device *dev) = NULL; int (*platform_notify_remove)(struct device *dev) = NULL; |
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static struct kobject *dev_kobj; struct kobject *sysfs_dev_char_kobj; struct kobject *sysfs_dev_block_kobj; |
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|
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#ifdef CONFIG_BLOCK static inline int device_is_not_partition(struct device *dev) { return !(dev->type == &part_type); } #else static inline int device_is_not_partition(struct device *dev) { return 1; } #endif |
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|
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/** * dev_driver_string - Return a device's driver name, if at all possible * @dev: struct device to get the name of * * Will return the device's driver's name if it is bound to a device. If * the device is not bound to a device, it will return the name of the bus * it is attached to. If it is not attached to a bus either, an empty * string will be returned. */ |
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const char *dev_driver_string(const struct device *dev) |
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{ |
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struct device_driver *drv; /* dev->driver can change to NULL underneath us because of unbinding, * so be careful about accessing it. dev->bus and dev->class should * never change once they are set, so they don't need special care. */ drv = ACCESS_ONCE(dev->driver); return drv ? drv->name : |
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(dev->bus ? dev->bus->name : (dev->class ? dev->class->name : "")); |
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} |
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EXPORT_SYMBOL(dev_driver_string); |
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|
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#define to_dev(obj) container_of(obj, struct device, kobj) #define to_dev_attr(_attr) container_of(_attr, struct device_attribute, attr) |
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static ssize_t dev_attr_show(struct kobject *kobj, struct attribute *attr, char *buf) |
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{ |
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struct device_attribute *dev_attr = to_dev_attr(attr); struct device *dev = to_dev(kobj); |
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ssize_t ret = -EIO; |
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if (dev_attr->show) |
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ret = dev_attr->show(dev, dev_attr, buf); |
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if (ret >= (ssize_t)PAGE_SIZE) { print_symbol("dev_attr_show: %s returned bad count ", (unsigned long)dev_attr->show); } |
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return ret; } |
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static ssize_t dev_attr_store(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) |
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{ |
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struct device_attribute *dev_attr = to_dev_attr(attr); struct device *dev = to_dev(kobj); |
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ssize_t ret = -EIO; |
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if (dev_attr->store) |
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ret = dev_attr->store(dev, dev_attr, buf, count); |
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return ret; } |
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static const struct sysfs_ops dev_sysfs_ops = { |
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.show = dev_attr_show, .store = dev_attr_store, }; |
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#define to_ext_attr(x) container_of(x, struct dev_ext_attribute, attr) ssize_t device_store_ulong(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct dev_ext_attribute *ea = to_ext_attr(attr); char *end; unsigned long new = simple_strtoul(buf, &end, 0); if (end == buf) return -EINVAL; *(unsigned long *)(ea->var) = new; /* Always return full write size even if we didn't consume all */ return size; } EXPORT_SYMBOL_GPL(device_store_ulong); ssize_t device_show_ulong(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ea = to_ext_attr(attr); return snprintf(buf, PAGE_SIZE, "%lx ", *(unsigned long *)(ea->var)); } EXPORT_SYMBOL_GPL(device_show_ulong); ssize_t device_store_int(struct device *dev, struct device_attribute *attr, const char *buf, size_t size) { struct dev_ext_attribute *ea = to_ext_attr(attr); char *end; long new = simple_strtol(buf, &end, 0); if (end == buf || new > INT_MAX || new < INT_MIN) return -EINVAL; *(int *)(ea->var) = new; /* Always return full write size even if we didn't consume all */ return size; } EXPORT_SYMBOL_GPL(device_store_int); ssize_t device_show_int(struct device *dev, struct device_attribute *attr, char *buf) { struct dev_ext_attribute *ea = to_ext_attr(attr); return snprintf(buf, PAGE_SIZE, "%d ", *(int *)(ea->var)); } EXPORT_SYMBOL_GPL(device_show_int); |
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/** * device_release - free device structure. * @kobj: device's kobject. * * This is called once the reference count for the object * reaches 0. We forward the call to the device's release * method, which should handle actually freeing the structure. */ |
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static void device_release(struct kobject *kobj) |
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{ |
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struct device *dev = to_dev(kobj); |
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struct device_private *p = dev->p; |
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if (dev->release) dev->release(dev); |
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else if (dev->type && dev->type->release) dev->type->release(dev); |
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else if (dev->class && dev->class->dev_release) dev->class->dev_release(dev); |
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else WARN(1, KERN_ERR "Device '%s' does not have a release() " |
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"function, it is broken and must be fixed. ", |
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dev_name(dev)); |
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kfree(p); |
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} |
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static const void *device_namespace(struct kobject *kobj) { struct device *dev = to_dev(kobj); const void *ns = NULL; if (dev->class && dev->class->ns_type) ns = dev->class->namespace(dev); return ns; } |
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static struct kobj_type device_ktype = { |
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.release = device_release, .sysfs_ops = &dev_sysfs_ops, |
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.namespace = device_namespace, |
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}; |
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static int dev_uevent_filter(struct kset *kset, struct kobject *kobj) |
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{ struct kobj_type *ktype = get_ktype(kobj); |
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if (ktype == &device_ktype) { |
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struct device *dev = to_dev(kobj); if (dev->bus) return 1; |
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if (dev->class) return 1; |
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} return 0; } |
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static const char *dev_uevent_name(struct kset *kset, struct kobject *kobj) |
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{ struct device *dev = to_dev(kobj); |
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if (dev->bus) return dev->bus->name; if (dev->class) return dev->class->name; return NULL; |
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} |
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static int dev_uevent(struct kset *kset, struct kobject *kobj, struct kobj_uevent_env *env) |
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{ struct device *dev = to_dev(kobj); |
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int retval = 0; |
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/* add device node properties if present */ |
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if (MAJOR(dev->devt)) { |
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const char *tmp; const char *name; |
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umode_t mode = 0; |
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|
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add_uevent_var(env, "MAJOR=%u", MAJOR(dev->devt)); add_uevent_var(env, "MINOR=%u", MINOR(dev->devt)); |
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name = device_get_devnode(dev, &mode, &tmp); |
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if (name) { add_uevent_var(env, "DEVNAME=%s", name); kfree(tmp); |
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if (mode) add_uevent_var(env, "DEVMODE=%#o", mode & 0777); |
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} |
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} |
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if (dev->type && dev->type->name) |
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add_uevent_var(env, "DEVTYPE=%s", dev->type->name); |
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|
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if (dev->driver) |
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add_uevent_var(env, "DRIVER=%s", dev->driver->name); |
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|
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/* have the bus specific function add its stuff */ |
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if (dev->bus && dev->bus->uevent) { |
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retval = dev->bus->uevent(dev, env); |
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if (retval) |
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pr_debug("device: '%s': %s: bus uevent() returned %d ", |
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dev_name(dev), __func__, retval); |
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} |
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/* have the class specific function add its stuff */ |
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if (dev->class && dev->class->dev_uevent) { |
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retval = dev->class->dev_uevent(dev, env); |
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if (retval) |
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pr_debug("device: '%s': %s: class uevent() " |
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"returned %d ", dev_name(dev), |
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__func__, retval); |
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} |
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/* have the device type specific function add its stuff */ |
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if (dev->type && dev->type->uevent) { |
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retval = dev->type->uevent(dev, env); |
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if (retval) |
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pr_debug("device: '%s': %s: dev_type uevent() " |
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"returned %d ", dev_name(dev), |
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__func__, retval); |
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} |
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return retval; } |
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static const struct kset_uevent_ops device_uevent_ops = { |
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.filter = dev_uevent_filter, .name = dev_uevent_name, .uevent = dev_uevent, |
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}; |
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static ssize_t show_uevent(struct device *dev, struct device_attribute *attr, char *buf) { struct kobject *top_kobj; struct kset *kset; |
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struct kobj_uevent_env *env = NULL; |
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int i; size_t count = 0; int retval; /* search the kset, the device belongs to */ top_kobj = &dev->kobj; |
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while (!top_kobj->kset && top_kobj->parent) top_kobj = top_kobj->parent; |
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if (!top_kobj->kset) goto out; |
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|
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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; |
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env = kzalloc(sizeof(struct kobj_uevent_env), GFP_KERNEL); if (!env) |
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return -ENOMEM; |
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/* let the kset specific function add its keys */ |
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retval = kset->uevent_ops->uevent(kset, &dev->kobj, env); |
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if (retval) goto out; /* copy keys to file */ |
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for (i = 0; i < env->envp_idx; i++) count += sprintf(&buf[count], "%s ", env->envp[i]); |
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out: |
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kfree(env); |
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return count; } |
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static ssize_t store_uevent(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { |
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enum kobject_action action; |
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if (kobject_action_type(buf, count, &action) == 0) |
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kobject_uevent(&dev->kobj, action); |
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else dev_err(dev, "uevent: unknown action-string "); |
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return count; } |
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static struct device_attribute uevent_attr = __ATTR(uevent, S_IRUGO | S_IWUSR, show_uevent, store_uevent); |
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static int device_add_attributes(struct device *dev, struct device_attribute *attrs) |
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{ |
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int error = 0; |
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int i; |
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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]); } |
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static int device_add_bin_attributes(struct device *dev, struct bin_attribute *attrs) { int error = 0; int i; if (attrs) { for (i = 0; attr_name(attrs[i]); i++) { error = device_create_bin_file(dev, &attrs[i]); if (error) break; } if (error) while (--i >= 0) device_remove_bin_file(dev, &attrs[i]); } return error; } static void device_remove_bin_attributes(struct device *dev, struct bin_attribute *attrs) { int i; if (attrs) for (i = 0; attr_name(attrs[i]); i++) device_remove_bin_file(dev, &attrs[i]); } |
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static int device_add_groups(struct device *dev, |
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const struct attribute_group **groups) |
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{ |
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int error = 0; |
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int i; |
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|
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if (groups) { for (i = 0; groups[i]; i++) { error = sysfs_create_group(&dev->kobj, groups[i]); |
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if (error) { while (--i >= 0) |
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sysfs_remove_group(&dev->kobj, groups[i]); |
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break; |
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} } } |
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return error; } |
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static void device_remove_groups(struct device *dev, |
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const struct attribute_group **groups) |
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{ int i; |
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if (groups) for (i = 0; groups[i]; i++) sysfs_remove_group(&dev->kobj, groups[i]); |
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} |
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static int device_add_attrs(struct device *dev) { struct class *class = dev->class; |
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const struct device_type *type = dev->type; |
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int error; |
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|
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if (class) { error = device_add_attributes(dev, class->dev_attrs); |
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if (error) |
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return error; |
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error = device_add_bin_attributes(dev, class->dev_bin_attrs); if (error) goto err_remove_class_attrs; |
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} |
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|
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if (type) { error = device_add_groups(dev, type->groups); |
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if (error) |
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goto err_remove_class_bin_attrs; |
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} |
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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); |
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err_remove_class_bin_attrs: if (class) device_remove_bin_attributes(dev, class->dev_bin_attrs); |
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err_remove_class_attrs: if (class) device_remove_attributes(dev, class->dev_attrs); |
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return error; } static void device_remove_attrs(struct device *dev) { struct class *class = dev->class; |
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const struct device_type *type = dev->type; |
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|
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471 |
device_remove_groups(dev, dev->groups); |
f9f852df2 Driver core: add ... |
472 |
|
621a1672f driver core: Use ... |
473 474 |
if (type) device_remove_groups(dev, type->groups); |
c97415a72 sysfs: Introducin... |
475 |
if (class) { |
621a1672f driver core: Use ... |
476 |
device_remove_attributes(dev, class->dev_attrs); |
c97415a72 sysfs: Introducin... |
477 478 |
device_remove_bin_attributes(dev, class->dev_bin_attrs); } |
2620efef7 Driver core: add ... |
479 |
} |
23681e479 [PATCH] Driver co... |
480 481 482 483 484 |
static ssize_t show_dev(struct device *dev, struct device_attribute *attr, char *buf) { return print_dev_t(buf, dev->devt); } |
ad6a1e1c6 driver-core: make... |
485 486 |
static struct device_attribute devt_attr = __ATTR(dev, S_IRUGO, show_dev, NULL); |
ca22e56de driver-core: impl... |
487 |
/* /sys/devices/ */ |
881c6cfd7 kset: convert /sy... |
488 |
struct kset *devices_kset; |
1da177e4c Linux-2.6.12-rc2 |
489 |
|
1da177e4c Linux-2.6.12-rc2 |
490 |
/** |
4a3ad20cc Driver core: codi... |
491 492 493 |
* device_create_file - create sysfs attribute file for device. * @dev: device. * @attr: device attribute descriptor. |
1da177e4c Linux-2.6.12-rc2 |
494 |
*/ |
26579ab70 Driver core: devi... |
495 496 |
int device_create_file(struct device *dev, const struct device_attribute *attr) |
1da177e4c Linux-2.6.12-rc2 |
497 498 |
{ int error = 0; |
0c98b19fe Driver core: Remo... |
499 |
if (dev) |
1da177e4c Linux-2.6.12-rc2 |
500 |
error = sysfs_create_file(&dev->kobj, &attr->attr); |
1da177e4c Linux-2.6.12-rc2 |
501 502 503 504 |
return error; } /** |
4a3ad20cc Driver core: codi... |
505 506 507 |
* device_remove_file - remove sysfs attribute file. * @dev: device. * @attr: device attribute descriptor. |
1da177e4c Linux-2.6.12-rc2 |
508 |
*/ |
26579ab70 Driver core: devi... |
509 510 |
void device_remove_file(struct device *dev, const struct device_attribute *attr) |
1da177e4c Linux-2.6.12-rc2 |
511 |
{ |
0c98b19fe Driver core: Remo... |
512 |
if (dev) |
1da177e4c Linux-2.6.12-rc2 |
513 |
sysfs_remove_file(&dev->kobj, &attr->attr); |
1da177e4c Linux-2.6.12-rc2 |
514 |
} |
2589f1887 Driver core: add ... |
515 516 517 518 519 |
/** * device_create_bin_file - create sysfs binary attribute file for device. * @dev: device. * @attr: device binary attribute descriptor. */ |
66ecb92be Driver core: bin_... |
520 521 |
int device_create_bin_file(struct device *dev, const struct bin_attribute *attr) |
2589f1887 Driver core: add ... |
522 523 524 525 526 527 528 529 530 531 532 533 534 |
{ int error = -EINVAL; if (dev) error = sysfs_create_bin_file(&dev->kobj, attr); return error; } EXPORT_SYMBOL_GPL(device_create_bin_file); /** * device_remove_bin_file - remove sysfs binary attribute file * @dev: device. * @attr: device binary attribute descriptor. */ |
66ecb92be Driver core: bin_... |
535 536 |
void device_remove_bin_file(struct device *dev, const struct bin_attribute *attr) |
2589f1887 Driver core: add ... |
537 538 539 540 541 |
{ if (dev) sysfs_remove_bin_file(&dev->kobj, attr); } EXPORT_SYMBOL_GPL(device_remove_bin_file); |
d9a9cdfb0 [PATCH] sysfs and... |
542 |
/** |
523ded71d device_schedule_c... |
543 |
* device_schedule_callback_owner - helper to schedule a callback for a device |
d9a9cdfb0 [PATCH] sysfs and... |
544 545 |
* @dev: device. * @func: callback function to invoke later. |
523ded71d device_schedule_c... |
546 |
* @owner: module owning the callback routine |
d9a9cdfb0 [PATCH] sysfs and... |
547 548 549 550 551 552 553 554 555 556 |
* * Attribute methods must not unregister themselves or their parent device * (which would amount to the same thing). Attempts to do so will deadlock, * since unregistration is mutually exclusive with driver callbacks. * * Instead methods can call this routine, which will attempt to allocate * and schedule a workqueue request to call back @func with @dev as its * argument in the workqueue's process context. @dev will be pinned until * @func returns. * |
523ded71d device_schedule_c... |
557 558 559 |
* This routine is usually called via the inline device_schedule_callback(), * which automatically sets @owner to THIS_MODULE. * |
d9a9cdfb0 [PATCH] sysfs and... |
560 |
* Returns 0 if the request was submitted, -ENOMEM if storage could not |
523ded71d device_schedule_c... |
561 |
* be allocated, -ENODEV if a reference to @owner isn't available. |
d9a9cdfb0 [PATCH] sysfs and... |
562 563 564 565 566 |
* * 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. */ |
523ded71d device_schedule_c... |
567 568 |
int device_schedule_callback_owner(struct device *dev, void (*func)(struct device *), struct module *owner) |
d9a9cdfb0 [PATCH] sysfs and... |
569 570 |
{ return sysfs_schedule_callback(&dev->kobj, |
523ded71d device_schedule_c... |
571 |
(void (*)(void *)) func, dev, owner); |
d9a9cdfb0 [PATCH] sysfs and... |
572 |
} |
523ded71d device_schedule_c... |
573 |
EXPORT_SYMBOL_GPL(device_schedule_callback_owner); |
d9a9cdfb0 [PATCH] sysfs and... |
574 |
|
34bb61f9d [PATCH] fix klist... |
575 576 |
static void klist_children_get(struct klist_node *n) { |
f791b8c83 driver core: move... |
577 578 |
struct device_private *p = to_device_private_parent(n); struct device *dev = p->device; |
34bb61f9d [PATCH] fix klist... |
579 580 581 582 583 584 |
get_device(dev); } static void klist_children_put(struct klist_node *n) { |
f791b8c83 driver core: move... |
585 586 |
struct device_private *p = to_device_private_parent(n); struct device *dev = p->device; |
34bb61f9d [PATCH] fix klist... |
587 588 589 |
put_device(dev); } |
1da177e4c Linux-2.6.12-rc2 |
590 |
/** |
4a3ad20cc Driver core: codi... |
591 592 |
* device_initialize - init device structure. * @dev: device. |
1da177e4c Linux-2.6.12-rc2 |
593 |
* |
5739411ac Driver core: Clar... |
594 595 |
* This prepares the device for use by other layers by initializing * its fields. |
4a3ad20cc Driver core: codi... |
596 |
* It is the first half of device_register(), if called by |
5739411ac Driver core: Clar... |
597 598 599 600 601 602 603 |
* that function, though it can also be called separately, so one * may use @dev's fields. In particular, get_device()/put_device() * may be used for reference counting of @dev after calling this * function. * * NOTE: Use put_device() to give up your reference instead of freeing * @dev directly once you have called this function. |
1da177e4c Linux-2.6.12-rc2 |
604 |
*/ |
1da177e4c Linux-2.6.12-rc2 |
605 606 |
void device_initialize(struct device *dev) { |
881c6cfd7 kset: convert /sy... |
607 |
dev->kobj.kset = devices_kset; |
f9cb074bf Kobject: rename k... |
608 |
kobject_init(&dev->kobj, &device_ktype); |
1da177e4c Linux-2.6.12-rc2 |
609 |
INIT_LIST_HEAD(&dev->dma_pools); |
3142788b7 drivers/base: Con... |
610 |
mutex_init(&dev->mutex); |
1704f47b5 lockdep: Add nova... |
611 |
lockdep_set_novalidate_class(&dev->mutex); |
9ac7849e3 devres: device re... |
612 613 |
spin_lock_init(&dev->devres_lock); INIT_LIST_HEAD(&dev->devres_head); |
3b98aeaf3 PM: don't skip de... |
614 |
device_pm_init(dev); |
873481367 [PATCH] add numa ... |
615 |
set_dev_node(dev, -1); |
1da177e4c Linux-2.6.12-rc2 |
616 |
} |
864062457 driver core: fix ... |
617 |
static struct kobject *virtual_device_parent(struct device *dev) |
f0ee61a6c Driver Core: Move... |
618 |
{ |
864062457 driver core: fix ... |
619 |
static struct kobject *virtual_dir = NULL; |
f0ee61a6c Driver Core: Move... |
620 |
|
864062457 driver core: fix ... |
621 |
if (!virtual_dir) |
4ff6abff8 kobject: get rid ... |
622 |
virtual_dir = kobject_create_and_add("virtual", |
881c6cfd7 kset: convert /sy... |
623 |
&devices_kset->kobj); |
f0ee61a6c Driver Core: Move... |
624 |
|
864062457 driver core: fix ... |
625 |
return virtual_dir; |
f0ee61a6c Driver Core: Move... |
626 |
} |
bc451f205 kobj: Add basic i... |
627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 |
struct class_dir { struct kobject kobj; struct class *class; }; #define to_class_dir(obj) container_of(obj, struct class_dir, kobj) static void class_dir_release(struct kobject *kobj) { struct class_dir *dir = to_class_dir(kobj); kfree(dir); } static const struct kobj_ns_type_operations *class_dir_child_ns_type(struct kobject *kobj) |
40fa54226 Driver core: make... |
642 |
{ |
bc451f205 kobj: Add basic i... |
643 644 645 646 647 648 649 650 651 652 653 654 655 656 |
struct class_dir *dir = to_class_dir(kobj); return dir->class->ns_type; } static struct kobj_type class_dir_ktype = { .release = class_dir_release, .sysfs_ops = &kobj_sysfs_ops, .child_ns_type = class_dir_child_ns_type }; static struct kobject * class_dir_create_and_add(struct class *class, struct kobject *parent_kobj) { struct class_dir *dir; |
43968d2f1 kobject: get rid ... |
657 |
int retval; |
bc451f205 kobj: Add basic i... |
658 659 660 661 662 663 |
dir = kzalloc(sizeof(*dir), GFP_KERNEL); if (!dir) return NULL; dir->class = class; kobject_init(&dir->kobj, &class_dir_ktype); |
6b6e39a6a driver-core: merg... |
664 |
dir->kobj.kset = &class->p->glue_dirs; |
bc451f205 kobj: Add basic i... |
665 666 667 668 669 670 671 672 673 674 675 676 677 |
retval = kobject_add(&dir->kobj, parent_kobj, "%s", class->name); if (retval < 0) { kobject_put(&dir->kobj); return NULL; } return &dir->kobj; } static struct kobject *get_device_parent(struct device *dev, struct device *parent) { |
864062457 driver core: fix ... |
678 |
if (dev->class) { |
77d3d7c1d driver-core: fix ... |
679 |
static DEFINE_MUTEX(gdp_mutex); |
864062457 driver core: fix ... |
680 681 682 |
struct kobject *kobj = NULL; struct kobject *parent_kobj; struct kobject *k; |
ead454feb driver core: fix ... |
683 |
#ifdef CONFIG_BLOCK |
39aba963d driver core: remo... |
684 |
/* block disks show up in /sys/block */ |
e52eec13c SYSFS: Allow boot... |
685 |
if (sysfs_deprecated && dev->class == &block_class) { |
39aba963d driver core: remo... |
686 687 |
if (parent && parent->class == &block_class) return &parent->kobj; |
6b6e39a6a driver-core: merg... |
688 |
return &block_class.p->subsys.kobj; |
39aba963d driver core: remo... |
689 |
} |
ead454feb driver core: fix ... |
690 |
#endif |
e52eec13c SYSFS: Allow boot... |
691 |
|
864062457 driver core: fix ... |
692 693 |
/* * If we have no parent, we live in "virtual". |
0f4dafc05 Kobject: auto-cle... |
694 695 |
* Class-devices with a non class-device as parent, live * in a "glue" directory to prevent namespace collisions. |
864062457 driver core: fix ... |
696 697 698 |
*/ if (parent == NULL) parent_kobj = virtual_device_parent(dev); |
24b1442d0 Driver-core: Alwa... |
699 |
else if (parent->class && !dev->class->ns_type) |
864062457 driver core: fix ... |
700 701 702 |
return &parent->kobj; else parent_kobj = &parent->kobj; |
77d3d7c1d driver-core: fix ... |
703 |
mutex_lock(&gdp_mutex); |
864062457 driver core: fix ... |
704 |
/* find our class-directory at the parent and reference it */ |
6b6e39a6a driver-core: merg... |
705 706 |
spin_lock(&dev->class->p->glue_dirs.list_lock); list_for_each_entry(k, &dev->class->p->glue_dirs.list, entry) |
864062457 driver core: fix ... |
707 708 709 710 |
if (k->parent == parent_kobj) { kobj = kobject_get(k); break; } |
6b6e39a6a driver-core: merg... |
711 |
spin_unlock(&dev->class->p->glue_dirs.list_lock); |
77d3d7c1d driver-core: fix ... |
712 713 |
if (kobj) { mutex_unlock(&gdp_mutex); |
864062457 driver core: fix ... |
714 |
return kobj; |
77d3d7c1d driver-core: fix ... |
715 |
} |
864062457 driver core: fix ... |
716 717 |
/* or create a new class-directory at the parent device */ |
bc451f205 kobj: Add basic i... |
718 |
k = class_dir_create_and_add(dev->class, parent_kobj); |
0f4dafc05 Kobject: auto-cle... |
719 |
/* do not emit an uevent for this simple "glue" directory */ |
77d3d7c1d driver-core: fix ... |
720 |
mutex_unlock(&gdp_mutex); |
43968d2f1 kobject: get rid ... |
721 |
return k; |
864062457 driver core: fix ... |
722 |
} |
ca22e56de driver-core: impl... |
723 724 725 |
/* subsystems can specify a default root directory for their devices */ if (!parent && dev->bus && dev->bus->dev_root) return &dev->bus->dev_root->kobj; |
864062457 driver core: fix ... |
726 |
if (parent) |
c744aeae9 driver core: Allo... |
727 728 729 |
return &parent->kobj; return NULL; } |
da231fd5d Driver core: fix ... |
730 |
|
63b6971a0 Driver core: Clea... |
731 |
static void cleanup_glue_dir(struct device *dev, struct kobject *glue_dir) |
da231fd5d Driver core: fix ... |
732 |
{ |
0f4dafc05 Kobject: auto-cle... |
733 |
/* see if we live in a "glue" directory */ |
c1fe539a7 Driver core: Fix ... |
734 |
if (!glue_dir || !dev->class || |
6b6e39a6a driver-core: merg... |
735 |
glue_dir->kset != &dev->class->p->glue_dirs) |
da231fd5d Driver core: fix ... |
736 |
return; |
0f4dafc05 Kobject: auto-cle... |
737 |
kobject_put(glue_dir); |
da231fd5d Driver core: fix ... |
738 |
} |
63b6971a0 Driver core: Clea... |
739 740 741 742 743 |
static void cleanup_device_parent(struct device *dev) { cleanup_glue_dir(dev, dev->kobj.parent); } |
864062457 driver core: fix ... |
744 |
|
2ee97caf0 Driver core: chec... |
745 746 747 748 749 750 |
static int device_add_class_symlinks(struct device *dev) { int error; if (!dev->class) return 0; |
da231fd5d Driver core: fix ... |
751 |
|
1fbfee6c6 class: rename "su... |
752 |
error = sysfs_create_link(&dev->kobj, |
6b6e39a6a driver-core: merg... |
753 |
&dev->class->p->subsys.kobj, |
2ee97caf0 Driver core: chec... |
754 755 756 |
"subsystem"); if (error) goto out; |
da231fd5d Driver core: fix ... |
757 |
|
4e886c296 Driver core: Fix ... |
758 |
if (dev->parent && device_is_not_partition(dev)) { |
39aba963d driver core: remo... |
759 |
error = sysfs_create_link(&dev->kobj, &dev->parent->kobj, |
4f01a757e Driver core: fix ... |
760 761 |
"device"); if (error) |
39aba963d driver core: remo... |
762 |
goto out_subsys; |
2ee97caf0 Driver core: chec... |
763 |
} |
2ee97caf0 Driver core: chec... |
764 |
|
ead454feb driver core: fix ... |
765 |
#ifdef CONFIG_BLOCK |
39aba963d driver core: remo... |
766 |
/* /sys/block has directories and does not need symlinks */ |
e52eec13c SYSFS: Allow boot... |
767 |
if (sysfs_deprecated && dev->class == &block_class) |
39aba963d driver core: remo... |
768 |
return 0; |
ead454feb driver core: fix ... |
769 |
#endif |
39aba963d driver core: remo... |
770 |
|
da231fd5d Driver core: fix ... |
771 |
/* link in the class directory pointing to the device */ |
6b6e39a6a driver-core: merg... |
772 |
error = sysfs_create_link(&dev->class->p->subsys.kobj, |
1e0b2cf93 driver core: stru... |
773 |
&dev->kobj, dev_name(dev)); |
da231fd5d Driver core: fix ... |
774 |
if (error) |
39aba963d driver core: remo... |
775 |
goto out_device; |
da231fd5d Driver core: fix ... |
776 |
|
da231fd5d Driver core: fix ... |
777 |
return 0; |
39aba963d driver core: remo... |
778 779 |
out_device: sysfs_remove_link(&dev->kobj, "device"); |
da231fd5d Driver core: fix ... |
780 |
|
2ee97caf0 Driver core: chec... |
781 782 783 784 785 786 787 788 789 790 |
out_subsys: sysfs_remove_link(&dev->kobj, "subsystem"); out: return error; } static void device_remove_class_symlinks(struct device *dev) { if (!dev->class) return; |
da231fd5d Driver core: fix ... |
791 |
|
4e886c296 Driver core: Fix ... |
792 |
if (dev->parent && device_is_not_partition(dev)) |
da231fd5d Driver core: fix ... |
793 |
sysfs_remove_link(&dev->kobj, "device"); |
2ee97caf0 Driver core: chec... |
794 |
sysfs_remove_link(&dev->kobj, "subsystem"); |
ead454feb driver core: fix ... |
795 |
#ifdef CONFIG_BLOCK |
e52eec13c SYSFS: Allow boot... |
796 |
if (sysfs_deprecated && dev->class == &block_class) |
39aba963d driver core: remo... |
797 |
return; |
ead454feb driver core: fix ... |
798 |
#endif |
6b6e39a6a driver-core: merg... |
799 |
sysfs_delete_link(&dev->class->p->subsys.kobj, &dev->kobj, dev_name(dev)); |
2ee97caf0 Driver core: chec... |
800 |
} |
1da177e4c Linux-2.6.12-rc2 |
801 |
/** |
413c239fa driver-core: prep... |
802 803 |
* dev_set_name - set a device name * @dev: device |
462323661 dev_set_name: fix... |
804 |
* @fmt: format string for the device's name |
413c239fa driver-core: prep... |
805 806 807 808 |
*/ int dev_set_name(struct device *dev, const char *fmt, ...) { va_list vargs; |
1fa5ae857 driver core: get ... |
809 |
int err; |
413c239fa driver-core: prep... |
810 811 |
va_start(vargs, fmt); |
1fa5ae857 driver core: get ... |
812 |
err = kobject_set_name_vargs(&dev->kobj, fmt, vargs); |
413c239fa driver-core: prep... |
813 |
va_end(vargs); |
1fa5ae857 driver core: get ... |
814 |
return err; |
413c239fa driver-core: prep... |
815 816 817 818 |
} EXPORT_SYMBOL_GPL(dev_set_name); /** |
e105b8bfc sysfs: add /sys/d... |
819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 |
* device_to_dev_kobj - select a /sys/dev/ directory for the device * @dev: device * * By default we select char/ for new entries. Setting class->dev_obj * to NULL prevents an entry from being created. class->dev_kobj must * be set (or cleared) before any devices are registered to the class * otherwise device_create_sys_dev_entry() and * device_remove_sys_dev_entry() will disagree about the the presence * of the link. */ static struct kobject *device_to_dev_kobj(struct device *dev) { struct kobject *kobj; if (dev->class) kobj = dev->class->dev_kobj; else kobj = sysfs_dev_char_kobj; return kobj; } static int device_create_sys_dev_entry(struct device *dev) { struct kobject *kobj = device_to_dev_kobj(dev); int error = 0; char devt_str[15]; if (kobj) { format_dev_t(devt_str, dev->devt); error = sysfs_create_link(kobj, &dev->kobj, devt_str); } return error; } static void device_remove_sys_dev_entry(struct device *dev) { struct kobject *kobj = device_to_dev_kobj(dev); char devt_str[15]; if (kobj) { format_dev_t(devt_str, dev->devt); sysfs_remove_link(kobj, devt_str); } } |
b40284378 Driver core: move... |
865 866 867 868 869 870 871 872 873 874 |
int device_private_init(struct device *dev) { dev->p = kzalloc(sizeof(*dev->p), GFP_KERNEL); if (!dev->p) return -ENOMEM; dev->p->device = dev; klist_init(&dev->p->klist_children, klist_children_get, klist_children_put); return 0; } |
e105b8bfc sysfs: add /sys/d... |
875 |
/** |
4a3ad20cc Driver core: codi... |
876 877 |
* device_add - add device to device hierarchy. * @dev: device. |
1da177e4c Linux-2.6.12-rc2 |
878 |
* |
4a3ad20cc Driver core: codi... |
879 880 |
* This is part 2 of device_register(), though may be called * separately _iff_ device_initialize() has been called separately. |
1da177e4c Linux-2.6.12-rc2 |
881 |
* |
5739411ac Driver core: Clar... |
882 |
* This adds @dev to the kobject hierarchy via kobject_add(), adds it |
4a3ad20cc Driver core: codi... |
883 884 |
* to the global and sibling lists for the device, then * adds it to the other relevant subsystems of the driver model. |
5739411ac Driver core: Clar... |
885 886 887 888 |
* * NOTE: _Never_ directly free @dev after calling this function, even * if it returned an error! Always use put_device() to give up your * reference instead. |
1da177e4c Linux-2.6.12-rc2 |
889 890 891 892 |
*/ int device_add(struct device *dev) { struct device *parent = NULL; |
ca22e56de driver-core: impl... |
893 |
struct kobject *kobj; |
c47ed219b Class: add suppor... |
894 |
struct class_interface *class_intf; |
c906a48ad driver core: add ... |
895 |
int error = -EINVAL; |
775b64d2b PM: Acquire devic... |
896 |
|
1da177e4c Linux-2.6.12-rc2 |
897 |
dev = get_device(dev); |
c906a48ad driver core: add ... |
898 899 |
if (!dev) goto done; |
fb069a5d1 driver core: crea... |
900 |
if (!dev->p) { |
b40284378 Driver core: move... |
901 902 903 |
error = device_private_init(dev); if (error) goto done; |
fb069a5d1 driver core: crea... |
904 |
} |
fb069a5d1 driver core: crea... |
905 |
|
1fa5ae857 driver core: get ... |
906 907 908 909 910 911 |
/* * for statically allocated devices, which should all be converted * some day, we need to initialize the name. We prevent reading back * the name, and force the use of dev_name() */ if (dev->init_name) { |
acc0e90fb driver core: fix ... |
912 |
dev_set_name(dev, "%s", dev->init_name); |
1fa5ae857 driver core: get ... |
913 914 |
dev->init_name = NULL; } |
c906a48ad driver core: add ... |
915 |
|
ca22e56de driver-core: impl... |
916 917 918 |
/* subsystems can specify simple device enumeration */ if (!dev_name(dev) && dev->bus && dev->bus->dev_name) dev_set_name(dev, "%s%u", dev->bus->dev_name, dev->id); |
e6309e756 Driver-core: Fix ... |
919 920 |
if (!dev_name(dev)) { error = -EINVAL; |
5c8563d77 Driver Core: do n... |
921 |
goto name_error; |
e6309e756 Driver-core: Fix ... |
922 |
} |
1da177e4c Linux-2.6.12-rc2 |
923 |
|
1e0b2cf93 driver core: stru... |
924 925 |
pr_debug("device: '%s': %s ", dev_name(dev), __func__); |
c205ef488 Driver core: crea... |
926 |
|
1da177e4c Linux-2.6.12-rc2 |
927 |
parent = get_device(dev->parent); |
ca22e56de driver-core: impl... |
928 929 930 |
kobj = get_device_parent(dev, parent); if (kobj) dev->kobj.parent = kobj; |
1da177e4c Linux-2.6.12-rc2 |
931 |
|
0d358f22f driver core: try ... |
932 933 934 |
/* use parent numa_node */ if (parent) set_dev_node(dev, dev_to_node(parent)); |
1da177e4c Linux-2.6.12-rc2 |
935 |
/* first, register with generic layer. */ |
8a577ffc7 driver: dont upda... |
936 937 |
/* we require the name to be set before, and pass NULL */ error = kobject_add(&dev->kobj, dev->kobj.parent, NULL); |
40fa54226 Driver core: make... |
938 |
if (error) |
1da177e4c Linux-2.6.12-rc2 |
939 |
goto Error; |
a7fd67062 [PATCH] add sysfs... |
940 |
|
370226449 drivers/base: Pla... |
941 942 943 |
/* notify platform of device entry */ if (platform_notify) platform_notify(dev); |
ad6a1e1c6 driver-core: make... |
944 |
error = device_create_file(dev, &uevent_attr); |
a306eea40 driver core fixes... |
945 946 |
if (error) goto attrError; |
a7fd67062 [PATCH] add sysfs... |
947 |
|
23681e479 [PATCH] Driver co... |
948 |
if (MAJOR(dev->devt)) { |
ad6a1e1c6 driver-core: make... |
949 950 |
error = device_create_file(dev, &devt_attr); if (error) |
a306eea40 driver core fixes... |
951 |
goto ueventattrError; |
e105b8bfc sysfs: add /sys/d... |
952 953 954 955 |
error = device_create_sys_dev_entry(dev); if (error) goto devtattrError; |
2b2af54a5 Driver Core: devt... |
956 957 |
devtmpfs_create_node(dev); |
23681e479 [PATCH] Driver co... |
958 |
} |
2ee97caf0 Driver core: chec... |
959 960 961 |
error = device_add_class_symlinks(dev); if (error) goto SymlinkError; |
dc0afa838 Driver core: codi... |
962 963 |
error = device_add_attrs(dev); if (error) |
2620efef7 Driver core: add ... |
964 |
goto AttrsError; |
dc0afa838 Driver core: codi... |
965 966 |
error = bus_add_device(dev); if (error) |
1da177e4c Linux-2.6.12-rc2 |
967 |
goto BusError; |
3b98aeaf3 PM: don't skip de... |
968 |
error = dpm_sysfs_add(dev); |
57eee3d23 Driver core: Call... |
969 |
if (error) |
3b98aeaf3 PM: don't skip de... |
970 971 |
goto DPMError; device_pm_add(dev); |
ec0676ee2 Driver core: move... |
972 973 974 975 976 977 978 |
/* Notify clients of device addition. This call must come * 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); |
83b5fb4cc Driver core: supp... |
979 |
kobject_uevent(&dev->kobj, KOBJ_ADD); |
2023c610d Driver core: add ... |
980 |
bus_probe_device(dev); |
1da177e4c Linux-2.6.12-rc2 |
981 |
if (parent) |
f791b8c83 driver core: move... |
982 983 |
klist_add_tail(&dev->p->knode_parent, &parent->p->klist_children); |
1da177e4c Linux-2.6.12-rc2 |
984 |
|
5d9fd169c [PATCH] Driver co... |
985 |
if (dev->class) { |
ca22e56de driver-core: impl... |
986 |
mutex_lock(&dev->class->p->mutex); |
c47ed219b Class: add suppor... |
987 |
/* tie the class to the device */ |
5a3ceb861 driver-core: use ... |
988 |
klist_add_tail(&dev->knode_class, |
6b6e39a6a driver-core: merg... |
989 |
&dev->class->p->klist_devices); |
c47ed219b Class: add suppor... |
990 991 |
/* notify any interfaces that the device is here */ |
184f1f779 class: rename "in... |
992 |
list_for_each_entry(class_intf, |
ca22e56de driver-core: impl... |
993 |
&dev->class->p->interfaces, node) |
c47ed219b Class: add suppor... |
994 995 |
if (class_intf->add_dev) class_intf->add_dev(dev, class_intf); |
ca22e56de driver-core: impl... |
996 |
mutex_unlock(&dev->class->p->mutex); |
5d9fd169c [PATCH] Driver co... |
997 |
} |
c906a48ad driver core: add ... |
998 |
done: |
1da177e4c Linux-2.6.12-rc2 |
999 1000 |
put_device(dev); return error; |
3b98aeaf3 PM: don't skip de... |
1001 |
DPMError: |
57eee3d23 Driver core: Call... |
1002 1003 |
bus_remove_device(dev); BusError: |
82f0cf9b7 Driver core: fix ... |
1004 |
device_remove_attrs(dev); |
2620efef7 Driver core: add ... |
1005 |
AttrsError: |
2ee97caf0 Driver core: chec... |
1006 1007 |
device_remove_class_symlinks(dev); SymlinkError: |
ad6a1e1c6 driver-core: make... |
1008 |
if (MAJOR(dev->devt)) |
ad72956df Driver Core: devt... |
1009 1010 |
devtmpfs_delete_node(dev); if (MAJOR(dev->devt)) |
e105b8bfc sysfs: add /sys/d... |
1011 1012 1013 |
device_remove_sys_dev_entry(dev); devtattrError: if (MAJOR(dev->devt)) |
ad6a1e1c6 driver-core: make... |
1014 |
device_remove_file(dev, &devt_attr); |
a306eea40 driver core fixes... |
1015 |
ueventattrError: |
ad6a1e1c6 driver-core: make... |
1016 |
device_remove_file(dev, &uevent_attr); |
23681e479 [PATCH] Driver co... |
1017 |
attrError: |
312c004d3 [PATCH] driver co... |
1018 |
kobject_uevent(&dev->kobj, KOBJ_REMOVE); |
1da177e4c Linux-2.6.12-rc2 |
1019 1020 |
kobject_del(&dev->kobj); Error: |
63b6971a0 Driver core: Clea... |
1021 |
cleanup_device_parent(dev); |
1da177e4c Linux-2.6.12-rc2 |
1022 1023 |
if (parent) put_device(parent); |
5c8563d77 Driver Core: do n... |
1024 1025 1026 |
name_error: kfree(dev->p); dev->p = NULL; |
c906a48ad driver core: add ... |
1027 |
goto done; |
1da177e4c Linux-2.6.12-rc2 |
1028 |
} |
1da177e4c Linux-2.6.12-rc2 |
1029 |
/** |
4a3ad20cc Driver core: codi... |
1030 1031 |
* device_register - register a device with the system. * @dev: pointer to the device structure |
1da177e4c Linux-2.6.12-rc2 |
1032 |
* |
4a3ad20cc Driver core: codi... |
1033 1034 1035 1036 1037 1038 |
* This happens in two clean steps - initialize the device * and add it to the system. The two steps can be called * separately, but this is the easiest and most common. * I.e. you should only call the two helpers separately if * have a clearly defined need to use and refcount the device * before it is added to the hierarchy. |
5739411ac Driver core: Clar... |
1039 1040 1041 1042 |
* * NOTE: _Never_ directly free @dev after calling this function, even * if it returned an error! Always use put_device() to give up the * reference initialized in this function instead. |
1da177e4c Linux-2.6.12-rc2 |
1043 |
*/ |
1da177e4c Linux-2.6.12-rc2 |
1044 1045 1046 1047 1048 |
int device_register(struct device *dev) { device_initialize(dev); return device_add(dev); } |
1da177e4c Linux-2.6.12-rc2 |
1049 |
/** |
4a3ad20cc Driver core: codi... |
1050 1051 |
* get_device - increment reference count for device. * @dev: device. |
1da177e4c Linux-2.6.12-rc2 |
1052 |
* |
4a3ad20cc Driver core: codi... |
1053 1054 1055 |
* This simply forwards the call to kobject_get(), though * we do take care to provide for the case that we get a NULL * pointer passed in. |
1da177e4c Linux-2.6.12-rc2 |
1056 |
*/ |
4a3ad20cc Driver core: codi... |
1057 |
struct device *get_device(struct device *dev) |
1da177e4c Linux-2.6.12-rc2 |
1058 1059 1060 |
{ return dev ? to_dev(kobject_get(&dev->kobj)) : NULL; } |
1da177e4c Linux-2.6.12-rc2 |
1061 |
/** |
4a3ad20cc Driver core: codi... |
1062 1063 |
* put_device - decrement reference count. * @dev: device in question. |
1da177e4c Linux-2.6.12-rc2 |
1064 |
*/ |
4a3ad20cc Driver core: codi... |
1065 |
void put_device(struct device *dev) |
1da177e4c Linux-2.6.12-rc2 |
1066 |
{ |
edfaa7c36 Driver core: conv... |
1067 |
/* might_sleep(); */ |
1da177e4c Linux-2.6.12-rc2 |
1068 1069 1070 |
if (dev) kobject_put(&dev->kobj); } |
1da177e4c Linux-2.6.12-rc2 |
1071 |
/** |
4a3ad20cc Driver core: codi... |
1072 1073 |
* device_del - delete device from system. * @dev: device. |
1da177e4c Linux-2.6.12-rc2 |
1074 |
* |
4a3ad20cc Driver core: codi... |
1075 1076 1077 1078 1079 |
* This is the first part of the device unregistration * sequence. This removes the device from the lists we control * from here, has it removed from the other driver model * subsystems it was added to in device_add(), and removes it * from the kobject hierarchy. |
1da177e4c Linux-2.6.12-rc2 |
1080 |
* |
4a3ad20cc Driver core: codi... |
1081 1082 |
* NOTE: this should be called manually _iff_ device_add() was * also called manually. |
1da177e4c Linux-2.6.12-rc2 |
1083 |
*/ |
4a3ad20cc Driver core: codi... |
1084 |
void device_del(struct device *dev) |
1da177e4c Linux-2.6.12-rc2 |
1085 |
{ |
4a3ad20cc Driver core: codi... |
1086 |
struct device *parent = dev->parent; |
c47ed219b Class: add suppor... |
1087 |
struct class_interface *class_intf; |
1da177e4c Linux-2.6.12-rc2 |
1088 |
|
ec0676ee2 Driver core: move... |
1089 1090 1091 1092 1093 1094 |
/* Notify clients of device removal. This call must come * before dpm_sysfs_remove(). */ if (dev->bus) blocking_notifier_call_chain(&dev->bus->p->bus_notifier, BUS_NOTIFY_DEL_DEVICE, dev); |
775b64d2b PM: Acquire devic... |
1095 |
device_pm_remove(dev); |
3b98aeaf3 PM: don't skip de... |
1096 |
dpm_sysfs_remove(dev); |
1da177e4c Linux-2.6.12-rc2 |
1097 |
if (parent) |
f791b8c83 driver core: move... |
1098 |
klist_del(&dev->p->knode_parent); |
e105b8bfc sysfs: add /sys/d... |
1099 |
if (MAJOR(dev->devt)) { |
2b2af54a5 Driver Core: devt... |
1100 |
devtmpfs_delete_node(dev); |
e105b8bfc sysfs: add /sys/d... |
1101 |
device_remove_sys_dev_entry(dev); |
ad6a1e1c6 driver-core: make... |
1102 |
device_remove_file(dev, &devt_attr); |
e105b8bfc sysfs: add /sys/d... |
1103 |
} |
b9d9c82b4 [PATCH] Driver co... |
1104 |
if (dev->class) { |
da231fd5d Driver core: fix ... |
1105 |
device_remove_class_symlinks(dev); |
99ef3ef8d CONFIG_SYSFS_DEPR... |
1106 |
|
ca22e56de driver-core: impl... |
1107 |
mutex_lock(&dev->class->p->mutex); |
c47ed219b Class: add suppor... |
1108 |
/* notify any interfaces that the device is now gone */ |
184f1f779 class: rename "in... |
1109 |
list_for_each_entry(class_intf, |
ca22e56de driver-core: impl... |
1110 |
&dev->class->p->interfaces, node) |
c47ed219b Class: add suppor... |
1111 1112 1113 |
if (class_intf->remove_dev) class_intf->remove_dev(dev, class_intf); /* remove the device from the class list */ |
5a3ceb861 driver-core: use ... |
1114 |
klist_del(&dev->knode_class); |
ca22e56de driver-core: impl... |
1115 |
mutex_unlock(&dev->class->p->mutex); |
b9d9c82b4 [PATCH] Driver co... |
1116 |
} |
ad6a1e1c6 driver-core: make... |
1117 |
device_remove_file(dev, &uevent_attr); |
2620efef7 Driver core: add ... |
1118 |
device_remove_attrs(dev); |
289535334 Driver core: Call... |
1119 |
bus_remove_device(dev); |
1da177e4c Linux-2.6.12-rc2 |
1120 |
|
2f8d16a99 devres: release r... |
1121 1122 1123 1124 1125 1126 |
/* * Some platform devices are driven without driver attached * and managed resources may have been acquired. Make sure * all resources are released. */ devres_release_all(dev); |
1da177e4c Linux-2.6.12-rc2 |
1127 1128 1129 1130 1131 |
/* Notify the platform of the removal, in case they * need to do anything... */ if (platform_notify_remove) platform_notify_remove(dev); |
312c004d3 [PATCH] driver co... |
1132 |
kobject_uevent(&dev->kobj, KOBJ_REMOVE); |
da231fd5d Driver core: fix ... |
1133 |
cleanup_device_parent(dev); |
1da177e4c Linux-2.6.12-rc2 |
1134 |
kobject_del(&dev->kobj); |
da231fd5d Driver core: fix ... |
1135 |
put_device(parent); |
1da177e4c Linux-2.6.12-rc2 |
1136 1137 1138 |
} /** |
4a3ad20cc Driver core: codi... |
1139 1140 |
* device_unregister - unregister device from system. * @dev: device going away. |
1da177e4c Linux-2.6.12-rc2 |
1141 |
* |
4a3ad20cc Driver core: codi... |
1142 1143 1144 1145 1146 1147 |
* We do this in two parts, like we do device_register(). First, * we remove it from all the subsystems with device_del(), then * we decrement the reference count via put_device(). If that * is the final reference count, the device will be cleaned up * via device_release() above. Otherwise, the structure will * stick around until the final reference to the device is dropped. |
1da177e4c Linux-2.6.12-rc2 |
1148 |
*/ |
4a3ad20cc Driver core: codi... |
1149 |
void device_unregister(struct device *dev) |
1da177e4c Linux-2.6.12-rc2 |
1150 |
{ |
1e0b2cf93 driver core: stru... |
1151 1152 |
pr_debug("device: '%s': %s ", dev_name(dev), __func__); |
1da177e4c Linux-2.6.12-rc2 |
1153 1154 1155 |
device_del(dev); put_device(dev); } |
4a3ad20cc Driver core: codi... |
1156 |
static struct device *next_device(struct klist_iter *i) |
36239577c [PATCH] Use a kli... |
1157 |
{ |
4a3ad20cc Driver core: codi... |
1158 |
struct klist_node *n = klist_next(i); |
f791b8c83 driver core: move... |
1159 1160 1161 1162 1163 1164 1165 1166 |
struct device *dev = NULL; struct device_private *p; if (n) { p = to_device_private_parent(n); dev = p->device; } return dev; |
36239577c [PATCH] Use a kli... |
1167 |
} |
1da177e4c Linux-2.6.12-rc2 |
1168 |
/** |
e454cea20 Driver-Core: exte... |
1169 |
* device_get_devnode - path of device node file |
6fcf53acc Driver Core: add ... |
1170 |
* @dev: device |
e454cea20 Driver-Core: exte... |
1171 |
* @mode: returned file access mode |
6fcf53acc Driver Core: add ... |
1172 1173 1174 1175 1176 1177 1178 |
* @tmp: possibly allocated string * * Return the relative path of a possible device node. * Non-default names may need to allocate a memory to compose * a name. This memory is returned in tmp and needs to be * freed by the caller. */ |
e454cea20 Driver-Core: exte... |
1179 |
const char *device_get_devnode(struct device *dev, |
2c9ede55e switch device_get... |
1180 |
umode_t *mode, const char **tmp) |
6fcf53acc Driver Core: add ... |
1181 1182 1183 1184 1185 1186 |
{ char *s; *tmp = NULL; /* the device type may provide a specific name */ |
e454cea20 Driver-Core: exte... |
1187 1188 |
if (dev->type && dev->type->devnode) *tmp = dev->type->devnode(dev, mode); |
6fcf53acc Driver Core: add ... |
1189 1190 1191 1192 |
if (*tmp) return *tmp; /* the class may provide a specific name */ |
e454cea20 Driver-Core: exte... |
1193 1194 |
if (dev->class && dev->class->devnode) *tmp = dev->class->devnode(dev, mode); |
6fcf53acc Driver Core: add ... |
1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 |
if (*tmp) return *tmp; /* return name without allocation, tmp == NULL */ if (strchr(dev_name(dev), '!') == NULL) return dev_name(dev); /* replace '!' in the name with '/' */ *tmp = kstrdup(dev_name(dev), GFP_KERNEL); if (!*tmp) return NULL; while ((s = strchr(*tmp, '!'))) s[0] = '/'; return *tmp; } /** |
4a3ad20cc Driver core: codi... |
1212 1213 1214 1215 |
* device_for_each_child - device child iterator. * @parent: parent struct device. * @data: data for the callback. * @fn: function to be called for each device. |
1da177e4c Linux-2.6.12-rc2 |
1216 |
* |
4a3ad20cc Driver core: codi... |
1217 1218 |
* Iterate over @parent's child devices, and call @fn for each, * passing it @data. |
1da177e4c Linux-2.6.12-rc2 |
1219 |
* |
4a3ad20cc Driver core: codi... |
1220 1221 |
* We check the return of @fn each time. If it returns anything * other than 0, we break out and return that value. |
1da177e4c Linux-2.6.12-rc2 |
1222 |
*/ |
4a3ad20cc Driver core: codi... |
1223 1224 |
int device_for_each_child(struct device *parent, void *data, int (*fn)(struct device *dev, void *data)) |
1da177e4c Linux-2.6.12-rc2 |
1225 |
{ |
36239577c [PATCH] Use a kli... |
1226 |
struct klist_iter i; |
4a3ad20cc Driver core: codi... |
1227 |
struct device *child; |
1da177e4c Linux-2.6.12-rc2 |
1228 |
int error = 0; |
014c90dbb driver core: prev... |
1229 1230 |
if (!parent->p) return 0; |
f791b8c83 driver core: move... |
1231 |
klist_iter_init(&parent->p->klist_children, &i); |
36239577c [PATCH] Use a kli... |
1232 1233 1234 |
while ((child = next_device(&i)) && !error) error = fn(child, data); klist_iter_exit(&i); |
1da177e4c Linux-2.6.12-rc2 |
1235 1236 |
return error; } |
5ab699810 driver core: Intr... |
1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 |
/** * device_find_child - device iterator for locating a particular device. * @parent: parent struct device * @data: Data to pass to match function * @match: Callback function to check device * * This is similar to the device_for_each_child() function above, but it * returns a reference to a device that is 'found' for later use, as * determined by the @match callback. * * The callback should return 0 if the device doesn't match and non-zero * if it does. If the callback returns non-zero and a reference to the * current device can be obtained, this function will return to the caller * and not iterate over any more devices. */ |
4a3ad20cc Driver core: codi... |
1252 1253 |
struct device *device_find_child(struct device *parent, void *data, int (*match)(struct device *dev, void *data)) |
5ab699810 driver core: Intr... |
1254 1255 1256 1257 1258 1259 |
{ struct klist_iter i; struct device *child; if (!parent) return NULL; |
f791b8c83 driver core: move... |
1260 |
klist_iter_init(&parent->p->klist_children, &i); |
5ab699810 driver core: Intr... |
1261 1262 1263 1264 1265 1266 |
while ((child = next_device(&i))) if (match(child, data) && get_device(child)) break; klist_iter_exit(&i); return child; } |
1da177e4c Linux-2.6.12-rc2 |
1267 1268 |
int __init devices_init(void) { |
881c6cfd7 kset: convert /sy... |
1269 1270 1271 |
devices_kset = kset_create_and_add("devices", &device_uevent_ops, NULL); if (!devices_kset) return -ENOMEM; |
e105b8bfc sysfs: add /sys/d... |
1272 1273 1274 1275 1276 1277 1278 1279 1280 |
dev_kobj = kobject_create_and_add("dev", NULL); if (!dev_kobj) goto dev_kobj_err; sysfs_dev_block_kobj = kobject_create_and_add("block", dev_kobj); if (!sysfs_dev_block_kobj) goto block_kobj_err; sysfs_dev_char_kobj = kobject_create_and_add("char", dev_kobj); if (!sysfs_dev_char_kobj) goto char_kobj_err; |
881c6cfd7 kset: convert /sy... |
1281 |
return 0; |
e105b8bfc sysfs: add /sys/d... |
1282 1283 1284 1285 1286 1287 1288 1289 |
char_kobj_err: kobject_put(sysfs_dev_block_kobj); block_kobj_err: kobject_put(dev_kobj); dev_kobj_err: kset_unregister(devices_kset); return -ENOMEM; |
1da177e4c Linux-2.6.12-rc2 |
1290 1291 1292 |
} EXPORT_SYMBOL_GPL(device_for_each_child); |
5ab699810 driver core: Intr... |
1293 |
EXPORT_SYMBOL_GPL(device_find_child); |
1da177e4c Linux-2.6.12-rc2 |
1294 1295 1296 1297 1298 1299 1300 1301 1302 |
EXPORT_SYMBOL_GPL(device_initialize); EXPORT_SYMBOL_GPL(device_add); EXPORT_SYMBOL_GPL(device_register); EXPORT_SYMBOL_GPL(device_del); EXPORT_SYMBOL_GPL(device_unregister); EXPORT_SYMBOL_GPL(get_device); EXPORT_SYMBOL_GPL(put_device); |
1da177e4c Linux-2.6.12-rc2 |
1303 1304 1305 |
EXPORT_SYMBOL_GPL(device_create_file); EXPORT_SYMBOL_GPL(device_remove_file); |
23681e479 [PATCH] Driver co... |
1306 |
|
7f100d156 drivers/base/core... |
1307 |
struct root_device { |
0aa0dc41b driver core: add ... |
1308 1309 1310 |
struct device dev; struct module *owner; }; |
481e20799 driver core: Repl... |
1311 1312 1313 1314 |
inline struct root_device *to_root_device(struct device *d) { return container_of(d, struct root_device, dev); } |
0aa0dc41b driver core: add ... |
1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 |
static void root_device_release(struct device *dev) { kfree(to_root_device(dev)); } /** * __root_device_register - allocate and register a root device * @name: root device name * @owner: owner module of the root device, usually THIS_MODULE * * This function allocates a root device and registers it * using device_register(). In order to free the returned * device, use root_device_unregister(). * * Root devices are dummy devices which allow other devices * to be grouped under /sys/devices. Use this function to * allocate a root device and then use it as the parent of * any device which should appear under /sys/devices/{name} * * The /sys/devices/{name} directory will also contain a * 'module' symlink which points to the @owner directory * in sysfs. * |
f0eae0ed3 driver-core: docu... |
1339 1340 |
* Returns &struct device pointer on success, or ERR_PTR() on error. * |
0aa0dc41b driver core: add ... |
1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 |
* Note: You probably want to use root_device_register(). */ struct device *__root_device_register(const char *name, struct module *owner) { struct root_device *root; int err = -ENOMEM; root = kzalloc(sizeof(struct root_device), GFP_KERNEL); if (!root) return ERR_PTR(err); |
acc0e90fb driver core: fix ... |
1351 |
err = dev_set_name(&root->dev, "%s", name); |
0aa0dc41b driver core: add ... |
1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 |
if (err) { kfree(root); return ERR_PTR(err); } root->dev.release = root_device_release; err = device_register(&root->dev); if (err) { put_device(&root->dev); return ERR_PTR(err); } |
1d9e882ba driver-core: fix ... |
1364 |
#ifdef CONFIG_MODULES /* gotta find a "cleaner" way to do this */ |
0aa0dc41b driver core: add ... |
1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 |
if (owner) { struct module_kobject *mk = &owner->mkobj; err = sysfs_create_link(&root->dev.kobj, &mk->kobj, "module"); if (err) { device_unregister(&root->dev); return ERR_PTR(err); } root->owner = owner; } #endif return &root->dev; } EXPORT_SYMBOL_GPL(__root_device_register); /** * root_device_unregister - unregister and free a root device |
7cbcf2254 driver-core: fix ... |
1383 |
* @dev: device going away |
0aa0dc41b driver core: add ... |
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 |
* * This function unregisters and cleans up a device that was created by * root_device_register(). */ void root_device_unregister(struct device *dev) { struct root_device *root = to_root_device(dev); if (root->owner) sysfs_remove_link(&root->dev.kobj, "module"); device_unregister(dev); } EXPORT_SYMBOL_GPL(root_device_unregister); |
23681e479 [PATCH] Driver co... |
1398 1399 1400 |
static void device_create_release(struct device *dev) { |
1e0b2cf93 driver core: stru... |
1401 1402 |
pr_debug("device: '%s': %s ", dev_name(dev), __func__); |
23681e479 [PATCH] Driver co... |
1403 1404 1405 1406 |
kfree(dev); } /** |
8882b3942 Driver core: add ... |
1407 |
* device_create_vargs - creates a device and registers it with sysfs |
42734dafa [PATCH] Driver co... |
1408 1409 1410 |
* @class: pointer to the struct class that this device should be registered to * @parent: pointer to the parent struct device of this new device, if any * @devt: the dev_t for the char device to be added |
8882b3942 Driver core: add ... |
1411 |
* @drvdata: the data to be added to the device for callbacks |
42734dafa [PATCH] Driver co... |
1412 |
* @fmt: string for the device's name |
8882b3942 Driver core: add ... |
1413 |
* @args: va_list for the device's name |
42734dafa [PATCH] Driver co... |
1414 1415 1416 |
* * This function can be used by char device classes. A struct device * will be created in sysfs, registered to the specified class. |
23681e479 [PATCH] Driver co... |
1417 |
* |
23681e479 [PATCH] Driver co... |
1418 1419 |
* A "dev" file will be created, showing the dev_t for the device, if * the dev_t is not 0,0. |
42734dafa [PATCH] Driver co... |
1420 1421 1422 1423 |
* If a pointer to a parent struct device is passed in, the newly created * struct device will be a child of that device in sysfs. * The pointer to the struct device will be returned from the call. * Any further sysfs files that might be required can be created using this |
23681e479 [PATCH] Driver co... |
1424 1425 |
* pointer. * |
f0eae0ed3 driver-core: docu... |
1426 1427 |
* Returns &struct device pointer on success, or ERR_PTR() on error. * |
23681e479 [PATCH] Driver co... |
1428 1429 1430 |
* Note: the struct class passed to this function must have previously * been created with a call to class_create(). */ |
8882b3942 Driver core: add ... |
1431 1432 1433 |
struct device *device_create_vargs(struct class *class, struct device *parent, dev_t devt, void *drvdata, const char *fmt, va_list args) |
23681e479 [PATCH] Driver co... |
1434 |
{ |
23681e479 [PATCH] Driver co... |
1435 1436 1437 1438 1439 |
struct device *dev = NULL; int retval = -ENODEV; if (class == NULL || IS_ERR(class)) goto error; |
23681e479 [PATCH] Driver co... |
1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 |
dev = kzalloc(sizeof(*dev), GFP_KERNEL); if (!dev) { retval = -ENOMEM; goto error; } dev->devt = devt; dev->class = class; dev->parent = parent; dev->release = device_create_release; |
8882b3942 Driver core: add ... |
1451 |
dev_set_drvdata(dev, drvdata); |
23681e479 [PATCH] Driver co... |
1452 |
|
1fa5ae857 driver core: get ... |
1453 1454 1455 |
retval = kobject_set_name_vargs(&dev->kobj, fmt, args); if (retval) goto error; |
23681e479 [PATCH] Driver co... |
1456 1457 1458 |
retval = device_register(dev); if (retval) goto error; |
23681e479 [PATCH] Driver co... |
1459 1460 1461 |
return dev; error: |
286661b37 Driver core: Fix ... |
1462 |
put_device(dev); |
23681e479 [PATCH] Driver co... |
1463 1464 |
return ERR_PTR(retval); } |
8882b3942 Driver core: add ... |
1465 1466 1467 |
EXPORT_SYMBOL_GPL(device_create_vargs); /** |
4e1067394 device create: co... |
1468 |
* device_create - creates a device and registers it with sysfs |
8882b3942 Driver core: add ... |
1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 |
* @class: pointer to the struct class that this device should be registered to * @parent: pointer to the parent struct device of this new device, if any * @devt: the dev_t for the char device to be added * @drvdata: the data to be added to the device for callbacks * @fmt: string for the device's name * * This function can be used by char device classes. A struct device * will be created in sysfs, registered to the specified class. * * A "dev" file will be created, showing the dev_t for the device, if * the dev_t is not 0,0. * If a pointer to a parent struct device is passed in, the newly created * struct device will be a child of that device in sysfs. * The pointer to the struct device will be returned from the call. * Any further sysfs files that might be required can be created using this * pointer. * |
f0eae0ed3 driver-core: docu... |
1486 1487 |
* Returns &struct device pointer on success, or ERR_PTR() on error. * |
8882b3942 Driver core: add ... |
1488 1489 1490 |
* Note: the struct class passed to this function must have previously * been created with a call to class_create(). */ |
4e1067394 device create: co... |
1491 1492 |
struct device *device_create(struct class *class, struct device *parent, dev_t devt, void *drvdata, const char *fmt, ...) |
8882b3942 Driver core: add ... |
1493 1494 1495 1496 1497 1498 1499 1500 1501 |
{ va_list vargs; struct device *dev; va_start(vargs, fmt); dev = device_create_vargs(class, parent, devt, drvdata, fmt, vargs); va_end(vargs); return dev; } |
4e1067394 device create: co... |
1502 |
EXPORT_SYMBOL_GPL(device_create); |
8882b3942 Driver core: add ... |
1503 |
|
cd35449b9 driver core: conv... |
1504 |
static int __match_devt(struct device *dev, void *data) |
23681e479 [PATCH] Driver co... |
1505 |
{ |
cd35449b9 driver core: conv... |
1506 |
dev_t *devt = data; |
23681e479 [PATCH] Driver co... |
1507 |
|
cd35449b9 driver core: conv... |
1508 |
return dev->devt == *devt; |
775b64d2b PM: Acquire devic... |
1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 |
} /** * 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; |
23681e479 [PATCH] Driver co... |
1522 |
|
695794ae0 Driver Core: add ... |
1523 |
dev = class_find_device(class, NULL, &devt, __match_devt); |
cd35449b9 driver core: conv... |
1524 1525 |
if (dev) { put_device(dev); |
23681e479 [PATCH] Driver co... |
1526 |
device_unregister(dev); |
cd35449b9 driver core: conv... |
1527 |
} |
23681e479 [PATCH] Driver co... |
1528 1529 |
} EXPORT_SYMBOL_GPL(device_destroy); |
a2de48cac Driver core: add ... |
1530 1531 1532 1533 1534 |
/** * device_rename - renames a device * @dev: the pointer to the struct device to be renamed * @new_name: the new name of the device |
030c1d2bf kobject: Fix kobj... |
1535 1536 1537 1538 1539 |
* * It is the responsibility of the caller to provide mutual * exclusion between two different calls of device_rename * on the same device to ensure that new_name is valid and * won't conflict with other devices. |
c6c0ac664 driver core: Docu... |
1540 |
* |
a5462516a driver-core: docu... |
1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 |
* Note: Don't call this function. Currently, the networking layer calls this * function, but that will change. The following text from Kay Sievers offers * some insight: * * Renaming devices is racy at many levels, symlinks and other stuff are not * replaced atomically, and you get a "move" uevent, but it's not easy to * connect the event to the old and new device. Device nodes are not renamed at * all, there isn't even support for that in the kernel now. * * In the meantime, during renaming, your target name might be taken by another * driver, creating conflicts. Or the old name is taken directly after you * renamed it -- then you get events for the same DEVPATH, before you even see * the "move" event. It's just a mess, and nothing new should ever rely on * kernel device renaming. Besides that, it's not even implemented now for * other things than (driver-core wise very simple) network devices. * * We are currently about to change network renaming in udev to completely * disallow renaming of devices in the same namespace as the kernel uses, * because we can't solve the problems properly, that arise with swapping names * of multiple interfaces without races. Means, renaming of eth[0-9]* will only * be allowed to some other name than eth[0-9]*, for the aforementioned * reasons. * * Make up a "real" name in the driver before you register anything, or add * some other attributes for userspace to find the device, or use udev to add * symlinks -- but never rename kernel devices later, it's a complete mess. We * don't even want to get into that and try to implement the missing pieces in * the core. We really have other pieces to fix in the driver core mess. :) |
a2de48cac Driver core: add ... |
1569 |
*/ |
6937e8f8c driver core: devi... |
1570 |
int device_rename(struct device *dev, const char *new_name) |
a2de48cac Driver core: add ... |
1571 1572 1573 |
{ char *old_class_name = NULL; char *new_class_name = NULL; |
2ee97caf0 Driver core: chec... |
1574 |
char *old_device_name = NULL; |
a2de48cac Driver core: add ... |
1575 1576 1577 1578 1579 |
int error; dev = get_device(dev); if (!dev) return -EINVAL; |
1e0b2cf93 driver core: stru... |
1580 1581 |
pr_debug("device: '%s': %s: renaming to '%s' ", dev_name(dev), |
2b3a302a0 driver core: repl... |
1582 |
__func__, new_name); |
a2de48cac Driver core: add ... |
1583 |
|
1fa5ae857 driver core: get ... |
1584 |
old_device_name = kstrdup(dev_name(dev), GFP_KERNEL); |
2ee97caf0 Driver core: chec... |
1585 1586 1587 |
if (!old_device_name) { error = -ENOMEM; goto out; |
a2de48cac Driver core: add ... |
1588 |
} |
a2de48cac Driver core: add ... |
1589 |
|
f349cf347 driver core: Impl... |
1590 |
if (dev->class) { |
6b6e39a6a driver-core: merg... |
1591 |
error = sysfs_rename_link(&dev->class->p->subsys.kobj, |
f349cf347 driver core: Impl... |
1592 1593 1594 1595 |
&dev->kobj, old_device_name, new_name); if (error) goto out; } |
39aba963d driver core: remo... |
1596 |
|
a2de48cac Driver core: add ... |
1597 |
error = kobject_rename(&dev->kobj, new_name); |
1fa5ae857 driver core: get ... |
1598 |
if (error) |
2ee97caf0 Driver core: chec... |
1599 |
goto out; |
a2de48cac Driver core: add ... |
1600 |
|
2ee97caf0 Driver core: chec... |
1601 |
out: |
a2de48cac Driver core: add ... |
1602 |
put_device(dev); |
a2de48cac Driver core: add ... |
1603 |
kfree(new_class_name); |
952ab431c Driver core: Don'... |
1604 |
kfree(old_class_name); |
2ee97caf0 Driver core: chec... |
1605 |
kfree(old_device_name); |
a2de48cac Driver core: add ... |
1606 1607 1608 |
return error; } |
a2807dbcb driver core: expo... |
1609 |
EXPORT_SYMBOL_GPL(device_rename); |
8a82472f8 driver core: Intr... |
1610 1611 1612 1613 1614 |
static int device_move_class_links(struct device *dev, struct device *old_parent, struct device *new_parent) { |
f7f3461d8 Driver core: add ... |
1615 |
int error = 0; |
8a82472f8 driver core: Intr... |
1616 |
|
f7f3461d8 Driver core: add ... |
1617 1618 1619 1620 1621 1622 |
if (old_parent) sysfs_remove_link(&dev->kobj, "device"); if (new_parent) error = sysfs_create_link(&dev->kobj, &new_parent->kobj, "device"); return error; |
8a82472f8 driver core: Intr... |
1623 1624 1625 1626 1627 |
} /** * device_move - moves a device to a new parent * @dev: the pointer to the struct device to be moved |
c744aeae9 driver core: Allo... |
1628 |
* @new_parent: the new parent of the device (can by NULL) |
ffa6a7054 Driver core: Fix ... |
1629 |
* @dpm_order: how to reorder the dpm_list |
8a82472f8 driver core: Intr... |
1630 |
*/ |
ffa6a7054 Driver core: Fix ... |
1631 1632 |
int device_move(struct device *dev, struct device *new_parent, enum dpm_order dpm_order) |
8a82472f8 driver core: Intr... |
1633 1634 1635 |
{ int error; struct device *old_parent; |
c744aeae9 driver core: Allo... |
1636 |
struct kobject *new_parent_kobj; |
8a82472f8 driver core: Intr... |
1637 1638 1639 1640 |
dev = get_device(dev); if (!dev) return -EINVAL; |
ffa6a7054 Driver core: Fix ... |
1641 |
device_pm_lock(); |
8a82472f8 driver core: Intr... |
1642 |
new_parent = get_device(new_parent); |
4a3ad20cc Driver core: codi... |
1643 |
new_parent_kobj = get_device_parent(dev, new_parent); |
63b6971a0 Driver core: Clea... |
1644 |
|
1e0b2cf93 driver core: stru... |
1645 1646 1647 |
pr_debug("device: '%s': %s: moving to '%s' ", dev_name(dev), __func__, new_parent ? dev_name(new_parent) : "<NULL>"); |
c744aeae9 driver core: Allo... |
1648 |
error = kobject_move(&dev->kobj, new_parent_kobj); |
8a82472f8 driver core: Intr... |
1649 |
if (error) { |
63b6971a0 Driver core: Clea... |
1650 |
cleanup_glue_dir(dev, new_parent_kobj); |
8a82472f8 driver core: Intr... |
1651 1652 1653 1654 1655 1656 |
put_device(new_parent); goto out; } old_parent = dev->parent; dev->parent = new_parent; if (old_parent) |
f791b8c83 driver core: move... |
1657 |
klist_remove(&dev->p->knode_parent); |
0d358f22f driver core: try ... |
1658 |
if (new_parent) { |
f791b8c83 driver core: move... |
1659 1660 |
klist_add_tail(&dev->p->knode_parent, &new_parent->p->klist_children); |
0d358f22f driver core: try ... |
1661 1662 |
set_dev_node(dev, dev_to_node(new_parent)); } |
8a82472f8 driver core: Intr... |
1663 1664 1665 1666 1667 1668 1669 |
if (!dev->class) goto out_put; error = device_move_class_links(dev, old_parent, new_parent); if (error) { /* We ignore errors on cleanup since we're hosed anyway... */ device_move_class_links(dev, new_parent, old_parent); if (!kobject_move(&dev->kobj, &old_parent->kobj)) { |
c744aeae9 driver core: Allo... |
1670 |
if (new_parent) |
f791b8c83 driver core: move... |
1671 |
klist_remove(&dev->p->knode_parent); |
0d358f22f driver core: try ... |
1672 1673 |
dev->parent = old_parent; if (old_parent) { |
f791b8c83 driver core: move... |
1674 1675 |
klist_add_tail(&dev->p->knode_parent, &old_parent->p->klist_children); |
0d358f22f driver core: try ... |
1676 1677 |
set_dev_node(dev, dev_to_node(old_parent)); } |
8a82472f8 driver core: Intr... |
1678 |
} |
63b6971a0 Driver core: Clea... |
1679 |
cleanup_glue_dir(dev, new_parent_kobj); |
8a82472f8 driver core: Intr... |
1680 1681 1682 |
put_device(new_parent); goto out; } |
ffa6a7054 Driver core: Fix ... |
1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 |
switch (dpm_order) { case DPM_ORDER_NONE: break; case DPM_ORDER_DEV_AFTER_PARENT: device_pm_move_after(dev, new_parent); break; case DPM_ORDER_PARENT_BEFORE_DEV: device_pm_move_before(new_parent, dev); break; case DPM_ORDER_DEV_LAST: device_pm_move_last(dev); break; } |
8a82472f8 driver core: Intr... |
1696 1697 1698 |
out_put: put_device(old_parent); out: |
ffa6a7054 Driver core: Fix ... |
1699 |
device_pm_unlock(); |
8a82472f8 driver core: Intr... |
1700 1701 1702 |
put_device(dev); return error; } |
8a82472f8 driver core: Intr... |
1703 |
EXPORT_SYMBOL_GPL(device_move); |
37b0c0203 driver core: clea... |
1704 1705 1706 1707 1708 1709 |
/** * device_shutdown - call ->shutdown() on each device to shutdown. */ void device_shutdown(void) { |
6245838fe Driver core: Prot... |
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 |
struct device *dev; spin_lock(&devices_kset->list_lock); /* * Walk the devices list backward, shutting down each in turn. * Beware that device unplug events may also start pulling * devices offline, even as the system is shutting down. */ while (!list_empty(&devices_kset->list)) { dev = list_entry(devices_kset->list.prev, struct device, kobj.entry); get_device(dev); /* * Make sure the device is off the kset list, in the * event that dev->*->shutdown() doesn't remove it. */ list_del_init(&dev->kobj.entry); spin_unlock(&devices_kset->list_lock); |
fe6b91f47 PM / Driver core:... |
1728 1729 1730 1731 |
/* Don't allow any more runtime suspends */ pm_runtime_get_noresume(dev); pm_runtime_barrier(dev); |
37b0c0203 driver core: clea... |
1732 |
|
37b0c0203 driver core: clea... |
1733 1734 1735 1736 1737 1738 1739 1740 1741 |
if (dev->bus && dev->bus->shutdown) { dev_dbg(dev, "shutdown "); dev->bus->shutdown(dev); } else if (dev->driver && dev->driver->shutdown) { dev_dbg(dev, "shutdown "); dev->driver->shutdown(dev); } |
6245838fe Driver core: Prot... |
1742 1743 1744 |
put_device(dev); spin_lock(&devices_kset->list_lock); |
37b0c0203 driver core: clea... |
1745 |
} |
6245838fe Driver core: Prot... |
1746 |
spin_unlock(&devices_kset->list_lock); |
401097ea4 driver core: sync... |
1747 |
async_synchronize_full(); |
37b0c0203 driver core: clea... |
1748 |
} |
99bcf2171 device.h drivers/... |
1749 1750 1751 1752 1753 1754 |
/* * Device logging functions */ #ifdef CONFIG_PRINTK |
cbc466355 dynamic_debug: Ad... |
1755 1756 |
int __dev_printk(const char *level, const struct device *dev, struct va_format *vaf) |
99bcf2171 device.h drivers/... |
1757 1758 1759 1760 1761 1762 1763 |
{ if (!dev) return printk("%s(NULL device *): %pV", level, vaf); return printk("%s%s %s: %pV", level, dev_driver_string(dev), dev_name(dev), vaf); } |
cbc466355 dynamic_debug: Ad... |
1764 |
EXPORT_SYMBOL(__dev_printk); |
99bcf2171 device.h drivers/... |
1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 |
int dev_printk(const char *level, const struct device *dev, const char *fmt, ...) { struct va_format vaf; va_list args; int r; va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; r = __dev_printk(level, dev, &vaf); va_end(args); return r; } EXPORT_SYMBOL(dev_printk); #define define_dev_printk_level(func, kern_level) \ int func(const struct device *dev, const char *fmt, ...) \ { \ struct va_format vaf; \ va_list args; \ int r; \ \ va_start(args, fmt); \ \ vaf.fmt = fmt; \ vaf.va = &args; \ \ r = __dev_printk(kern_level, dev, &vaf); \ va_end(args); \ \ return r; \ } \ EXPORT_SYMBOL(func); define_dev_printk_level(dev_emerg, KERN_EMERG); define_dev_printk_level(dev_alert, KERN_ALERT); define_dev_printk_level(dev_crit, KERN_CRIT); define_dev_printk_level(dev_err, KERN_ERR); define_dev_printk_level(dev_warn, KERN_WARNING); define_dev_printk_level(dev_notice, KERN_NOTICE); define_dev_printk_level(_dev_info, KERN_INFO); #endif |