Test on latest version:
Host:
# uname -r
3.10.0-210.el7.x86_64
# rpm -q qemu-kvm-rhev
qemu-kvm-rhev-2.1.2-14.el7.x86_64
Guest:rhel7
Steps:
1.Install a RHEL7 guest with xhci device
2.Keep ping-pong migration during installation
Results:
migration successfully.
According to above test ,this bug has been fixed.
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://rhn.redhat.com/errata/RHSA-2015-0624.html