tree 4692c09a3ba9b7efb9eff3000f17d8bdbde00630
parent 9587f44aa69a4cfb13701b31a633852684bed701
author Alex Williamson <alex.williamson@redhat.com> 1367246496 -0600
committer Alex Williamson <alex.williamson@redhat.com> 1367246496 -0600

vfio: Use down_reads to protect iommu disconnects

If a group or device is released or a container is unset from a group
it can race against file ops on the container.  Protect these with
down_reads to allow concurrent users.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reported-by: Michael S. Tsirkin <mst@redhat.com>