NVME_IOCTL_E_CTRL_GONE
{ NVME_IOCTL_E_CTRL_GONE, NVME_ERR_CTRL_GONE, "the controller has been "
nvme->n_dead_status = NVME_IOCTL_E_CTRL_GONE;
if (nvme->n_dead && nvme->n_dead_status == NVME_IOCTL_E_CTRL_GONE)