MAX_PERIODIC_LOAD  651 drivers/usb/host/isp116x-hcd.c #define	MAX_PERIODIC_LOAD	600
MAX_PERIODIC_LOAD 1183 drivers/usb/host/isp1362-hcd.c #define	MAX_PERIODIC_LOAD	900	/* out of 1000 usec */
MAX_PERIODIC_LOAD  762 drivers/usb/host/sl811-hcd.c #define	MAX_PERIODIC_LOAD	500	/* out of 1000 usec */