Alex Williamson 5d6dee80a1
vfio: New external user group/file match ...
At the point where the kvm-vfio pseudo device wants to release its
vfio group reference, we can't always acquire a new reference to make
that happen. The group can be in a state where we wouldn't allow a
new reference to be added. This new helper function allows a caller
to match a file to a group to facilitate this. Given a file and
group, report if they match. Thus the caller needs to already have a
group reference to match to the file. This allows the deletion of a
group without acquiring a new reference.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com >
Reviewed-by: Eric Auger <eric.auger@redhat.com >
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com >
Tested-by: Eric Auger <eric.auger@redhat.com >
Cc: stable@vger.kernel.org
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