fNotifySem
if (fNotifySem >= 0)
delete_sem(fNotifySem);
if (fNotifySem < 0) {
fNotifySem = create_sem(0, "usb send request notify");
if (fNotifySem < 0) {
if (acquire_sem_etc(fNotifySem, 1, B_RELATIVE_TIMEOUT, 2000000) < B_OK) {
acquire_sem(fNotifySem);
release_sem(pipe->fNotifySem);
if (force && fNotifySem >= 0) {
release_sem_etc(fNotifySem, 1, B_RELEASE_IF_WAITING_ONLY);
sem_id fNotifySem;