On Fri, Feb 03, 2017 at 03:54:36PM +0800, Jason Wang wrote:

quoted

+	list_for_each_entry(vq, &vp_dev->vdev.vqs, list) {
+		if (vq->callback && vring_interrupt(irq, vq) == IRQ_HANDLED)

The check of vq->callback seems redundant, we will check it soon in 
vring_interrupt().

Good point - I wanted to keep things exactly as-is and dіdn't notice
we were already protected.