[libvirt] [PATCH] pci: Read bridge control register from the bridge

[Eric Blake]

On 08/31/2012 07:17 AM, Osier Yang wrote:
> Though I don't quite understand it well enough, but it looks
> wrong to read the control register from the device, and then
> write to its parent twice, while doing the secondary bus reset.
> ---
>  src/util/pci.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/src/util/pci.c b/src/util/pci.c
> index 0742d07..c3f1b2b 100644
> --- a/src/util/pci.c
> +++ b/src/util/pci.c
> @@ -642,7 +642,7 @@ pciTrySecondaryBusReset(pciDevice *dev,
>      /* Read the control register, set the reset flag, wait 200ms,
>       * unset the reset flag and wait 200ms.
>       */
> -    ctl = pciRead16(dev, PCI_BRIDGE_CONTROL);
> +    ctl = pciRead16(parent, PCI_BRIDGE_CONTROL);

ACK.  Unfortunately, I, like you, have no idea how to really test this,
and am reviewing solely based on the code comments.

-- 
Eric Blake   eblake at redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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