diff options
Diffstat (limited to 'include/linux/usb.h')
| -rw-r--r-- | include/linux/usb.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/usb.h b/include/linux/usb.h index d07d5aba9e7f..67a8d7bce43b 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -281,6 +281,14 @@ struct usb_bus { struct usb_tt; +/* + * struct usb_device - kernel's representation of a USB device + * + * FIXME: Write the kerneldoc! + * + * Usbcore drivers should not set usbdev->state directly. Instead use + * usb_set_device_state(). + */ struct usb_device { int devnum; /* Address on USB bus */ char devpath [16]; /* Use in messages: /port/port/... */ @@ -331,6 +339,10 @@ struct usb_device { extern struct usb_device *usb_get_dev(struct usb_device *dev); extern void usb_put_dev(struct usb_device *dev); +extern void usb_lock_device(struct usb_device *udev); +extern int usb_trylock_device(struct usb_device *udev); +extern void usb_unlock_device(struct usb_device *udev); + /* mostly for devices emulating SCSI over USB */ extern int usb_reset_device(struct usb_device *dev); extern int __usb_reset_device(struct usb_device *dev); |