Comment 3 for bug 1556854

This is know bug with linux kernel and hardware platforms. sriov_iommu_check was introduced to check this case proactively. The case was described in https://bugzilla.redhat.com/show_bug.cgi?id=1113399 and there is an opinion that patch should not be used without cautions.

Bug should be marked as invalid, and the case should be covered in Know issues with appropriate solution.