pci: Eliminate redundant PCIDevice::bus pointer

The bus pointer in PCIDevice is basically redundant with QOM information.
It's always initialized to the qdev_get_parent_bus(), the only difference
is the type.

Therefore this patch eliminates the field, instead creating a pci_get_bus()
helper to do the type mangling to derive it conveniently from the QOM
Device object underneath.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 9262682116..f38be2f0b4 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -505,7 +505,7 @@ static void rtas_ibm_get_config_addr_info2(PowerPCCPU *cpu,
             goto param_error_exit;
         }
 
-        rtas_st(rets, 1, (pci_bus_num(pdev->bus) << 16) + 1);
+        rtas_st(rets, 1, (pci_bus_num(pci_get_bus(pdev)) << 16) + 1);
         break;
     case RTAS_GET_PE_MODE:
         rtas_st(rets, 1, RTAS_PE_MODE_SHARED);