This bug is occurred in latest rhel6.5, so clone it to rhel6.5.

But the error message is a little difference, here is the error message in rhel6.5:
# virsh snapshot-create-as a sp1
Domain snapshot sp1 created
# virsh snapshot-revert a sp1
error: revert requires force: Target controller type ide does not match source usb

Version:
libvirt-0.10.2-24.el6.x86_64
qemu-kvm-0.12.1.2-2.402.el6.x86_64
kernel-2.6.32-419.el6.x86_64

+++ This bug was initially created as a clone of Bug #1006886 +++

Description of problem:
The internal snapshot cannot be reverted. It requires a force parameter but it should work without this parameter.

Version-Release number of selected component (if applicable):
upstream, libvirt-1.1.1-4.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. virsh snapshot-create domain
2. virsh snapshot-revert domain snapshot-id

Actual results:
error: revert requires force: Target device address type none does not match source pci

Expected results:
The snapshot should be reverted successfully without an error message.

--- Additional comment from Peter Krempa on 2013-09-12 06:20:29 EDT ---

Patch posted upstream http://www.redhat.com/archives/libvir-list/2013-September/msg00688.html

--- Additional comment from Peter Krempa on 2013-09-12 10:16:59 EDT ---

http://post-office.corp.redhat.com/archives/rhvirt-patches/2013-September/msg00431.html

--- Additional comment from Shanzhi Yu on 2013-09-15 21:21:54 EDT ---

Verify this bug with package libvirt-1.1.1-5.el7.x86_64
Steps:
1. exist an guest
# virsh list 
 Id    Name                           State
----------------------------------------------------
 9     rhel7qcow2                     running

2. create an snapshot
# virsh snapshot-create rhel7qcow2 

Domain snapshot 1379294046 created
3. revert the snapshot
# virsh snapshot-revert rhel7qcow2 1379294046

Succeed reverting snapshot with no error,so verify this bug.