if (fail) {
spin_lock_irq(&conf->device_lock);
list_add(&r1_bio->retry_list, &conf->bio_end_io_list);
spin_unlock_irq(&conf->device_lock);
md_wakeup_thread(conf->mddev->thread);
if (fail) {
spin_lock_irq(&conf->device_lock);
list_add(&r1_bio->retry_list, &conf->bio_end_io_list);
spin_unlock_irq(&conf->device_lock);
md_wakeup_thread(conf->mddev->thread);