HUB_SET_DEPTH    1052 drivers/usb/core/hub.c 					HUB_SET_DEPTH, USB_RT_HUB,
HUB_SET_DEPTH     609 include/linux/usb/hcd.h #define SetHubDepth		HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, HUB_SET_DEPTH)