Re: [Qemu-devel] [PATCH v2 1/6] s390x/pci: Use hotplug_dev instead of looking up the host bridge

[Collin Walling <walling@linux.ibm.com>]

On 1/14/19 5:31 AM, David Hildenbrand wrote:
> We directly have it in our hands.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>   hw/s390x/s390-pci-bus.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/hw/s390x/s390-pci-bus.c b/hw/s390x/s390-pci-bus.c
> index 7f911b216a..86dda831f9 100644
> --- a/hw/s390x/s390-pci-bus.c
> +++ b/hw/s390x/s390-pci-bus.c
> @@ -826,9 +826,9 @@ static bool s390_pci_alloc_idx(S390pciState *s, S390PCIBusDevice *pbdev)
>   static void s390_pcihost_plug(HotplugHandler *hotplug_dev, DeviceState *dev,
>                                 Error **errp)
>   {
> +    S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
>       PCIDevice *pdev = NULL;
>       S390PCIBusDevice *pbdev = NULL;
> -    S390pciState *s = s390_get_phb();
>   
>       if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
>           BusState *bus;
> @@ -935,11 +935,11 @@ static void s390_pcihost_timer_cb(void *opaque)
>   static void s390_pcihost_unplug(HotplugHandler *hotplug_dev, DeviceState *dev,
>                                   Error **errp)
>   {
> +    S390pciState *s = S390_PCI_HOST_BRIDGE(hotplug_dev);
>       PCIDevice *pci_dev = NULL;
>       PCIBus *bus;
>       int32_t devfn;
>       S390PCIBusDevice *pbdev = NULL;
> -    S390pciState *s = s390_get_phb();
>   
>       if (object_dynamic_cast(OBJECT(dev), TYPE_PCI_BRIDGE)) {
>           error_setg(errp, "PCI bridge hot unplug currently not supported");
> 

Looks like the macro will do the same thing as the function does? I 
wonder if it makes sense to one day replace all function calls with the 
macro.

Reviewed-by: Collin Walling <walling@linux.ibm.com>