display_event 153 tools/usb/ffs-aio-example/multibuff/device_app/aio_multibuff.c static void display_event(struct usb_functionfs_event *event) display_event 141 tools/usb/ffs-aio-example/simple/device_app/aio_simple.c static void display_event(struct usb_functionfs_event *event)