if (ktype == &ktype_device) {
struct device *dev = to_dev(kobj);
+ if (dev->uevent_suppress)
+ return 0;
if (dev->bus)
return 1;
if (dev->class)
"MINOR=%u", MINOR(dev->devt));
}
+ if (dev->type && dev->type->name)
+ add_uevent_var(envp, num_envp, &i,
+ buffer, buffer_size, &length,
+ "DEVTYPE=%s", dev->type->name);
+
if (dev->driver)
add_uevent_var(envp, num_envp, &i,
buffer, buffer_size, &length,
.uevent = dev_uevent,
};
+static ssize_t show_uevent(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct kobject *top_kobj;
+ struct kset *kset;
+ char *envp[32];
+ char *data = NULL;
+ char *pos;
+ int i;
+ size_t count = 0;
+ int retval;
+
+ /* search the kset, the device belongs to */
+ top_kobj = &dev->kobj;
+ if (!top_kobj->kset && top_kobj->parent) {
+ do {
+ top_kobj = top_kobj->parent;
+ } while (!top_kobj->kset && 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;
+
+ data = (char *)get_zeroed_page(GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ /* let the kset specific function add its keys */
+ pos = data;
+ retval = kset->uevent_ops->uevent(kset, &dev->kobj,
+ envp, ARRAY_SIZE(envp),
+ pos, PAGE_SIZE);
+ if (retval)
+ goto out;
+
+ /* copy keys to file */
+ for (i = 0; envp[i]; i++) {
+ pos = &buf[count];
+ count += sprintf(pos, "%s\n", envp[i]);
+ }
+out:
+ free_page((unsigned long)data);
+ return count;
+}
+
static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
+ if (memcmp(buf, "add", 3) != 0)
+ dev_err(dev, "uevent: unsupported action-string; this will "
+ "be ignored in a future kernel version");
kobject_uevent(&dev->kobj, KOBJ_ADD);
return count;
}
-static int device_add_groups(struct device *dev)
+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);
}
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)
{
/* 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;
+ return &dev->class->subsys.kobj;
else if (parent)
return &parent->kobj;
static struct kobject *virtual_dir = NULL;
if (!virtual_dir)
- virtual_dir = kobject_add_dir(&devices_subsys.kset.kobj, "virtual");
+ virtual_dir = kobject_add_dir(&devices_subsys.kobj, "virtual");
return virtual_dir;
}
BUS_NOTIFY_ADD_DEVICE, dev);
dev->uevent_attr.attr.name = "uevent";
- dev->uevent_attr.attr.mode = S_IWUSR;
+ dev->uevent_attr.attr.mode = S_IRUGO | S_IWUSR;
if (dev->driver)
dev->uevent_attr.attr.owner = dev->driver->owner;
dev->uevent_attr.store = store_uevent;
+ dev->uevent_attr.show = show_uevent;
error = device_create_file(dev, &dev->uevent_attr);
if (error)
goto attrError;
}
if (dev->class) {
- sysfs_create_link(&dev->kobj, &dev->class->subsys.kset.kobj,
+ sysfs_create_link(&dev->kobj, &dev->class->subsys.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,
+ if (dev->kobj.parent != &dev->class->subsys.kobj)
+ sysfs_create_link(&dev->class->subsys.kobj,
&dev->kobj, dev->bus_id);
if (parent) {
sysfs_create_link(&dev->kobj, &dev->parent->kobj,
if ((error = device_add_attrs(dev)))
goto AttrsError;
- if ((error = device_add_groups(dev)))
- goto GroupError;
if ((error = device_pm_add(dev)))
goto PMError;
if ((error = bus_add_device(dev)))
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);
+ kfree(class_name);
put_device(dev);
return error;
- AttachError:
- bus_remove_device(dev);
BusError:
device_pm_remove(dev);
PMError:
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->bus_notifier,
BUS_NOTIFY_DEL_DEVICE, dev);
- device_remove_groups(dev);
- GroupError:
device_remove_attrs(dev);
AttrsError:
if (dev->devt_attr) {
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,
+ if (dev->kobj.parent != &dev->class->subsys.kobj)
+ sysfs_remove_link(&dev->class->subsys.kobj,
dev->bus_id);
if (parent) {
#ifdef CONFIG_SYSFS_DEPRECATED
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,
+ if (dev->kobj.parent != &dev->class->subsys.kobj)
+ sysfs_remove_link(&dev->class->subsys.kobj,
dev->bus_id);
if (parent) {
#ifdef CONFIG_SYSFS_DEPRECATED
}
}
device_remove_file(dev, &dev->uevent_attr);
- device_remove_groups(dev);
device_remove_attrs(dev);
bus_remove_device(dev);
#endif
if (dev->class) {
- sysfs_remove_link(&dev->class->subsys.kset.kobj,
+ sysfs_remove_link(&dev->class->subsys.kobj,
old_symlink_name);
- sysfs_create_link(&dev->class->subsys.kset.kobj, &dev->kobj,
+ sysfs_create_link(&dev->class->subsys.kobj, &dev->kobj,
dev->bus_id);
}
put_device(dev);
projects / linux-drm-fsl-dcu.git / blobdiff