Re: [Qemu-devel] [PATCH v3 2/8] pc: acpi: decribe bridge device as not hotpluggable

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Dec 19, 2014 at 11:46:58AM +0000, Igor Mammedov wrote:
> when bridge hotplug is disabled, i.e. for machine
> types less then 2.0, bridge device was created as
> hotpluggable by mistake since commit 133a2da (2.1).
> Fix it by just creating it as a present device as
> it was done in 1.7.
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>

I still don't get this. Under 1.7 all devices are hotpluggable
unless disabled by device class. Bridges were hotpluggable too.

See 72c194f7e75cb64b2558111cb111adb49fbf4097, function
acpi_get_hotplug_info.

So if the idea is to match 1.7, this does not do it.

What, then, is the purpose of this patch?


> ---
>  hw/i386/acpi-build.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index a4d0c0c..c151fde 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -919,7 +919,7 @@ static void build_pci_bus_end(PCIBus *bus, void *bus_state)
>              }
>          }
>  
> -        if (!dc->hotpluggable || bridge_in_acpi) {
> +        if (!dc->hotpluggable || pc->is_bridge) {
>              clear_bit(slot, slot_hotplug_enable);
>          }
>      }
> -- 
> 1.8.3.1
>