Structure at include/uapi/linux/usb/ch9.h, line 345 References: drivers/staging/rtl8188eu/os_dep/usb_intf.c, line 52 drivers/usb/core/config.c, line 806 drivers/usb/core/devices.c, line 292 drivers/usb/core/devio.c, line 315 drivers/usb/core/devio.c, line 316 drivers/usb/core/hcd.c, line 721 drivers/usb/core/hcd.c, line 723 drivers/usb/core/hub.c, line 5604 drivers/usb/core/of.c, line 60 drivers/usb/gadget/composite.c, line 451 drivers/usb/gadget/config.c, line 77 drivers/usb/gadget/config.c, line 83 drivers/usb/gadget/legacy/inode.c, line 135 drivers/usb/gadget/legacy/inode.c, line 1769 drivers/usb/gadget/udc/aspeed-vhub/hub.c, line 97 drivers/usb/misc/iowarrior.c, line 538 drivers/usb/misc/usbtest.c, line 706 drivers/usb/misc/usbtest.c, line 710 drivers/usb/misc/usbtest.c, line 1255 drivers/usb/misc/usbtest.c, line 1283 include/linux/usb.h, line 375 include/linux/usb/gadget.h, line 781 include/uapi/linux/usb/ch9.h, line 345