[Qemu-devel] [PATCH v2 1/2] pci: add pci_for_each_bus

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

Useful for ACPI hotplug.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/pci/pci.c         | 17 +++++++++++++++++
 include/hw/pci/pci.h |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 8680063..a4f7f8d 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -1679,6 +1679,23 @@ static PCIBus *pci_find_bus_nr(PCIBus *bus, int bus_num)
     return NULL;
 }
 
+void pci_for_each_bus(PCIBus *bus, 
+                      void (*fn)(PCIBus *bus, void *opaque),
+                      void *opaque)
+{
+    PCIBus *sec;
+
+    if (!bus) {
+        return;
+    }
+
+    fn(bus, opaque);
+
+    QLIST_FOREACH(sec, &bus->child, sibling) {
+        pci_for_each_bus(sec, fn, opaque);
+    }
+}
+
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn)
 {
     bus = pci_find_bus_nr(bus, bus_num);
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 209dda4..a82c1c7 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -391,6 +391,9 @@ int pci_bus_num(PCIBus *s);
 void pci_for_each_device(PCIBus *bus, int bus_num,
                          void (*fn)(PCIBus *bus, PCIDevice *d, void *opaque),
                          void *opaque);
+void pci_for_each_bus(PCIBus *bus, 
+                      void (*fn)(PCIBus *bus, void *opaque),
+                      void *opaque);
 PCIBus *pci_find_primary_bus(void);
 PCIBus *pci_device_root_bus(const PCIDevice *d);
 const char *pci_root_bus_path(PCIDevice *dev);
-- 
MST