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While perhaps improbable, it could be possible that after finding our object that another thread running essentially in parallel could attempt to delete the same vHBA. So rather than dropping the lock right after finding the object, keep the lock around while we drop the object lock and work on deleting the object. Once the delete occurs we can safely drop the driver lock again. Cleanup some of the usage of cleanup instead out for the goto label.
LibVirt : simple API for virtualization
Libvirt is a C toolkit to interact with the virtualization capabilities
of recent versions of Linux (and other OSes). It is free software
available under the GNU Lesser General Public License. Virtualization of
the Linux Operating System means the ability to run multiple instances of
Operating Systems concurrently on a single hardware system where the basic
resources are driven by a Linux instance. The library aim at providing
long term stable C API initially for the Xen paravirtualization but
should be able to integrate other virtualization mechanisms if needed.
Daniel Veillard <veillard@redhat.com>