654dd2902d
The patches to add ACS checking to PCI device passthrough introduced a bug. With the current code, if you try to passthrough a device on the root bus (i.e. bus 0), then it denies the passthrough. This is because the code in pciDeviceIsBehindSwitchLackingACS() to check for a parent device doesn't take into account the possibility of the root bus. If we are on the root bus, it means we legitimately can't find a parent, and it also means that we don't have to worry about whether ACS is enabled. Therefore return 0 (indicating we don't lack ACS) from pciDeviceIsBehindSwitchLackingACS(). Signed-off-by: Chris Lalancette <clalance@redhat.com>
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>