1550 struct urb {  struct
1558 	/* public: documented fields in the urb that can be used by drivers */  argument
1559 	struct list_head urb_list;	/* list head for use by the urb's  argument
1561 	struct list_head anchor_list;	/* the URB may be anchored */
1562 	struct usb_anchor *anchor;
1563 	struct usb_device *dev;		/* (in) pointer to associated device */
1564 	struct usb_host_endpoint *ep;	/* (internal) pointer to endpoint */
1565 	unsigned int pipe;		/* (in) pipe information */
1566 	unsigned int stream_id;		/* (in) stream ID */
1567 	int status;			/* (return) non-ISO status */
1568 	unsigned int transfer_flags;	/* (in) URB_SHORT_NOT_OK | ...*/
1592  * usb_fill_control_urb - initializes a control urb  argument
1605 static inline void usb_fill_control_urb(struct urb *urb,  in usb_fill_control_urb()
1636 static inline void usb_fill_bulk_urb(struct urb *urb,  in usb_fill_bulk_urb()
1677 static inline void usb_fill_int_urb(struct urb *urb,  in usb_fill_int_urb()
1739 static inline int usb_urb_dir_in(struct urb *urb)  in usb_urb_dir_in()
1751 static inline int usb_urb_dir_out(struct urb *urb)  in usb_urb_dir_out()