interruptLock
device->interruptLock = create_sem(0, "usb_disk interrupt lock");
if (device->interruptLock < B_OK) {
status_t result = device->interruptLock;
if (interruptLock >= 0)
delete_sem(interruptLock);
release_sem(device->interruptLock);
acquire_sem(device->interruptLock);
sem_id interruptLock;