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pci: Eliminate redundant PCIDevice::bus pointer

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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>
This commit is contained in:
David Gibson 2017-11-29 19:46:27 +11:00 • committed by Michael S. Tsirkin
parent cdc57472dc
commit fd56e0612b
20 changed files with 102 additions and 92 deletions
Download patch file Download diff file Expand all files Collapse all files

5
hw/pci/pcie.c
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@ -155,7 +155,8 @@ pcie_endpoint_cap_common_init(PCIDevice *dev, uint8_t offset, uint8_t cap_size)
* a regular Endpoint type is exposed on a root complex. These
* should instead be Root Complex Integrated Endpoints.
*/
if (pci_bus_is_express(dev->bus) && pci_bus_is_root(dev->bus)) {
if (pci_bus_is_express(pci_get_bus(dev))
&& pci_bus_is_root(pci_get_bus(dev))) {
type = PCI_EXP_TYPE_RC_END;
}
@ -369,7 +370,7 @@ void pcie_cap_slot_hot_unplug_request_cb(HotplugHandler *hotplug_dev,
{
uint8_t *exp_cap;
PCIDevice *pci_dev = PCI_DEVICE(dev);
PCIBus *bus = pci_dev->bus;
PCIBus *bus = pci_get_bus(pci_dev);
pcie_cap_slot_hotplug_common(PCI_DEVICE(hotplug_dev), dev, &exp_cap, errp);