From d78b519f6b945aef6202bbb5b56f928572e15165 Mon Sep 17 00:00:00 2001
From: Brian Foley <brian.foley@arm.com>
Date: Mon, 24 Sep 2012 14:33:42 +0100
Subject: [PATCH] virtio_mmio: Don't attempt to create empty virtqueues

If a virtio device reports a QueueNumMax of 0, vring_new_virtqueue()
doesn't check this, and thanks to an unsigned (i < num - 1) loop
guard, scribbles over memory when initialising the free list.

Avoid by not trying to create zero-descriptor queues, as there's no
way to do any I/O with one.

Signed-off-by: Brian Foley <brian.foley@arm.com>
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---
Reading git-format-patch failed