diff options
| -rw-r--r-- | drivers/usb/core/message.c | 38 | ||||
| -rw-r--r-- | drivers/usb/core/usb.h | 2 |
2 files changed, 40 insertions, 0 deletions
diff --git a/drivers/usb/core/message.c b/drivers/usb/core/message.c index 3d25d89671d7..c090f50af102 100644 --- a/drivers/usb/core/message.c +++ b/drivers/usb/core/message.c @@ -1555,6 +1555,44 @@ static void usb_release_interface(struct device *dev) kfree(intf); } +/* + * usb_deauthorize_interface - deauthorize an USB interface + * + * @intf: USB interface structure + */ +void usb_deauthorize_interface(struct usb_interface *intf) +{ + struct device *dev = &intf->dev; + + device_lock(dev->parent); + + if (intf->authorized) { + device_lock(dev); + intf->authorized = 0; + device_unlock(dev); + + usb_forced_unbind_intf(intf); + } + + device_unlock(dev->parent); +} + +/* + * usb_authorize_interface - authorize an USB interface + * + * @intf: USB interface structure + */ +void usb_authorize_interface(struct usb_interface *intf) +{ + struct device *dev = &intf->dev; + + if (!intf->authorized) { + device_lock(dev); + intf->authorized = 1; /* authorize interface */ + device_unlock(dev); + } +} + static int usb_if_uevent(struct device *dev, struct kobj_uevent_env *env) { struct usb_device *usb_dev; diff --git a/drivers/usb/core/usb.h b/drivers/usb/core/usb.h index 457255a3306a..05b5e17abf92 100644 --- a/drivers/usb/core/usb.h +++ b/drivers/usb/core/usb.h @@ -27,6 +27,8 @@ extern void usb_release_interface_cache(struct kref *ref); extern void usb_disable_device(struct usb_device *dev, int skip_ep0); extern int usb_deauthorize_device(struct usb_device *); extern int usb_authorize_device(struct usb_device *); +extern void usb_deauthorize_interface(struct usb_interface *); +extern void usb_authorize_interface(struct usb_interface *); extern void usb_detect_quirks(struct usb_device *udev); extern void usb_detect_interface_quirks(struct usb_device *udev); extern int usb_remove_device(struct usb_device *udev); |