Structure at include/uapi/linux/usb/ch9.h, line 783 References: drivers/media/usb/cx231xx/cx231xx-cards.c, line 1699 drivers/usb/core/config.c, line 712 drivers/usb/core/config.c, line 714 drivers/usb/core/devices.c, line 240 drivers/usb/core/message.c, line 1861 drivers/usb/core/message.c, line 1865 drivers/usb/core/message.c, line 1866 drivers/usb/gadget/function/f_acm.c, line 93 drivers/usb/gadget/function/f_ecm.c, line 100 drivers/usb/gadget/function/f_fs.c, line 2106 drivers/usb/gadget/function/f_ncm.c, line 147 drivers/usb/gadget/function/f_rndis.c, line 172 drivers/usb/gadget/function/f_uac2.c, line 112 drivers/usb/gadget/function/f_uvc.c, line 67 include/linux/usb.h, line 243 include/linux/usb.h, line 381 include/uapi/linux/usb/ch9.h, line 783 sound/usb/card.c, line 283 sound/usb/mixer.c, line 3014