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14#include <linux/kernel.h>
15#include <linux/export.h>
16#include <linux/notifier.h>
17#include <linux/usb.h>
18#include <linux/mutex.h>
19#include "usb.h"
20
21static BLOCKING_NOTIFIER_HEAD(usb_notifier_list);
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28
29void usb_register_notify(struct notifier_block *nb)
30{
31 blocking_notifier_chain_register(&usb_notifier_list, nb);
32}
33EXPORT_SYMBOL_GPL(usb_register_notify);
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41
42void usb_unregister_notify(struct notifier_block *nb)
43{
44 blocking_notifier_chain_unregister(&usb_notifier_list, nb);
45}
46EXPORT_SYMBOL_GPL(usb_unregister_notify);
47
48
49void usb_notify_add_device(struct usb_device *udev)
50{
51 blocking_notifier_call_chain(&usb_notifier_list, USB_DEVICE_ADD, udev);
52}
53
54void usb_notify_remove_device(struct usb_device *udev)
55{
56
57 mutex_lock(&usbfs_mutex);
58 blocking_notifier_call_chain(&usb_notifier_list,
59 USB_DEVICE_REMOVE, udev);
60 mutex_unlock(&usbfs_mutex);
61}
62
63void usb_notify_add_bus(struct usb_bus *ubus)
64{
65 blocking_notifier_call_chain(&usb_notifier_list, USB_BUS_ADD, ubus);
66}
67
68void usb_notify_remove_bus(struct usb_bus *ubus)
69{
70 blocking_notifier_call_chain(&usb_notifier_list, USB_BUS_REMOVE, ubus);
71}
72