- res = -EAGAIN;
- if (!ctx->ticks && !(file->f_flags & O_NONBLOCK)) {
- __add_wait_queue(&ctx->wqh, &wait);
- for (res = 0;;) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (ctx->ticks) {
- res = 0;
- break;
- }
- if (signal_pending(current)) {
- res = -ERESTARTSYS;
- break;
- }
- spin_unlock_irq(&ctx->wqh.lock);
- schedule();
- spin_lock_irq(&ctx->wqh.lock);
- }
- __remove_wait_queue(&ctx->wqh, &wait);
- __set_current_state(TASK_RUNNING);
- }
+ if (file->f_flags & O_NONBLOCK)
+ res = -EAGAIN;
+ else
+ res = wait_event_interruptible_locked_irq(ctx->wqh, ctx->ticks);