Man page 9 : usb_fill_bulk_urb

usb_fill_bulk_urb - macro to help initialize a bulk urb

void usb_fill_bulk_urb(struct urb *  urb , struct usb_device *  dev , unsigned int  pipe , void *  transfer_buffer , int  buffer_length , usb_complete_t  complete_fn , void *  context );

urb
    pointer to the urb to initialize.

dev
    pointer to the struct usb_device for this urb.

pipe
    the endpoint pipe

transfer_buffer
    pointer to the transfer buffer

buffer_length
    length of the transfer buffer

complete_fn
    pointer to the usb_complete_t function

context
    what to set the urb context to.

Initializes a bulk urb with the proper information needed to submit it to a device.