[libvirt] [PATCH] Read PCI class from sysfs class file instead of config space.

[Michal Privoznik]

On 10.12.2013 10:57, Thadeu Lima de Souza Cascardo wrote:
> When determining if a device is behind a PCI bridge, the PCI device
> class is checked by reading the config space. However, there are some
> devices which have the wrong class on the config space, but the class is
> initialized by Linux correctly as a PCI BRIDGE. This class can be read
> by the sysfs file '/sys/bus/pci/devices/xxxx:xx:xx.x/class'.
> 
> One example of such bridge is IBM PCI Bridge 1014:03b9, which is
> identified as a Host Bridge when reading the config space.
> 
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at linux.vnet.ibm.com>
> ---
>  src/util/virpci.c |   38 +++++++++++++++++++++++++++++++++++---
>  1 files changed, 35 insertions(+), 3 deletions(-)

Adding a regression test should be easy (esp. when virpcitest is already
written).

Michal