usb_alloc_urb(9)
NAME
usb_alloc_urb - creates a new urb for a USB driver to use
SYNOPSIS
struct urb * usb_alloc_urb(int iso_packets, gfp_t mem_flags);
ARGUMENTS
- iso_packets
- number of iso packets for this urb
- mem_flags
- the type of memory to allocate, see kmalloc for a list of valid options for this.
DESCRIPTION
Creates an urb for the USB driver to use, initializes a few internal
structures, incrementes the usage counter, 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 must call usb_free_urb when it is finished with the urb.