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/pci/pcie_aer.c b/hw/pci/pcie_aer.c
index 21f896a..b009be7 100644
--- a/hw/pci/pcie_aer.c
+++ b/hw/pci/pcie_aer.c
@@ -409,7 +409,7 @@ static void pcie_aer_msg(PCIDevice *dev, const PCIEAERMsg *msg)
              */
             return;
         }
-        dev = pci_bridge_get_device(dev->bus);
+        dev = pci_bridge_get_device(pci_get_bus(dev));
     }
 }