[Qemu-devel] [PATCH v3 1/3] qdev: Introduce a function to get qbus's parent

[<arei.gonglei@huawei.com>]

From: Gonglei <arei.gonglei@huawei.com>

We may use it check type of qbus's parent.

Signed-off-by: Gonglei <arei.gonglei@huawei.com>
---
 hw/core/qdev.c         | 9 +++++++++
 include/hw/qdev-core.h | 1 +
 2 files changed, 10 insertions(+)

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index da1ba48..e42d313 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -616,6 +616,15 @@ BusState *qbus_create(const char *typename, DeviceState *parent, const char *nam
     return bus;
 }
 
+DeviceState *qbus_get_parent(BusState *bus)
+{
+    if (bus) {
+        return bus->parent;
+    }
+
+    return NULL;
+}
+
 static char *bus_get_fw_dev_path(BusState *bus, DeviceState *dev)
 {
     BusClass *bc = BUS_GET_CLASS(bus);
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 0799ff2..760e726 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -301,6 +301,7 @@ typedef int (qdev_walkerfn)(DeviceState *dev, void *opaque);
 void qbus_create_inplace(void *bus, size_t size, const char *typename,
                          DeviceState *parent, const char *name);
 BusState *qbus_create(const char *typename, DeviceState *parent, const char *name);
+DeviceState *qbus_get_parent(BusState *bus);
 /* Returns > 0 if either devfn or busfn skip walk somewhere in cursion,
  *         < 0 if either devfn or busfn terminate walk somewhere in cursion,
  *           0 otherwise. */
-- 
1.7.12.4