[Qemu-devel] Re: [PATCH] pci: pass bridge update to secondary bus

[Isaku Yamahata]

On Tue, Jul 06, 2010 at 02:23:27PM +0300, Michael S. Tsirkin wrote:
> bridge config write should trigger updates
> on the secondary bus. never on the primary bus.
> 
> Signed-off-by: Michael S. Tsirkin <address@hidden>
> ---
> 
> Compile-tested only.
> Isaku Yamahata, could you review this please?
> You wrote the code, and you seem to have some bridged setups.

The code looks good.

Should PCIBridge::bus be renamed to something like
PCIBridge::secondary_bus (or sec_bus for short) in order
to avoid confusion?
The redundant local variable, secondary_bus, was deliberately
introduced to emphasize that it's a secondary bus.
And I was confused by that.
Anyway such a change should be done by another patch.

> 
>  hw/pci.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/hw/pci.c b/hw/pci.c
> index 926cf63..011d83e 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -1513,7 +1513,9 @@ static void pci_bridge_write_config(PCIDevice *d,
>          /* memory base/limit, prefetchable base/limit and
>             io base/limit upper 16 */
>          ranges_overlap(address, len, PCI_MEMORY_BASE, 20)) {
> -        pci_bridge_update_mappings(d->bus);
> +        PCIBridge *s = container_of(d, PCIBridge, dev);
> +        PCIBus *secondary_bus = &s->bus;
> +        pci_bridge_update_mappings(secondary_bus);
>      }
>  }
>  
> -- 
> 1.7.2.rc0.14.g41c1c
> 

-- 
yamahata