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The cpu hotplug helper functions used negative error handling in a part of them, although some code that was added later didn't properly set the error codes in some cases. This would cause improper error messages in cases where we couldn't modify the numa cpu mask and a few other cases. Fix the logic by converting it to the regularly used pattern.
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>