STRUCT
USB_INTERFACE(9) Host-Side Data Types and Macro STRUCT USB_INTERFACE(9)
NAME
struct_usb_interface_cache - long-term representation of a device interface
SYNOPSIS
struct usb_interface_cache {
unsigned num_altsetting;
struct kref ref;
struct usb_host_interface altsetting[0];
};
MEMBERS
num_altsetting
number of altsettings defined.
ref
reference counter.
altsetting[0]
variable-length array of interface structures, one for each alternate setting that may be selected. Each one includes a set of endpoint
configurations. They will be in no particular order.
DESCRIPTION
These structures persist for the lifetime of a usb_device, unlike struct usb_interface (which persists only as long as its configuration is
installed). The altsetting arrays can be accessed through these structures at any time, permitting comparison of configurations and
providing support for the /proc/bus/usb/devices pseudo-file.
COPYRIGHT
Kernel Hackers Manual 2.6. July 2010 STRUCT USB_INTERFACE(9)
