Provided by: kernel-doc-2.4.27_2.4.27-12_all
usb_alloc_urb - creates a new urb for a USB driver to use
struct urb * usb_alloc_urb (int iso_packets);
iso_packets number of iso packets for this urb
Creates an urb for the USB driver to use and returns a pointer to it.
If no memory is available, NULL is returned.
If the driver want to use this urb for interrupt, control, or bulk
endpoints, pass ’0’ as the number of iso packets.
The driver should call usb_free_urb when it is finished with the urb.