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I recently patches the callers to virPCIDeviceReset() to not call it if the current driver for a device was vfio-pci (since that driver will always reset the device itself when appropriate. At the time, Dan Berrange suggested that I could instead modify virPCIDeviceReset to check the currently bound driver for the device, and decide for itself whether or not to go ahead with the reset. This patch removes the previously added checks, and replaces them with a check down in virPCIDeviceReset(), as suggested. The functional difference here is that previously we were deciding based on either the hostdev configuration or the value of stubDriverName in the virPCIDevice object, but now we are actually comparing to the "driver" link in the device's sysfs entry directly. In practice, both should be the same.
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>