[PATCH 2/3] hw/qdev: Introduce BusClass::is_full() handler

["Philippe Mathieu-Daudé" <philmd@oss.qualcomm.com>]

Allow BusClass implementation to have their own is_full() handler.
Use it in qbus_is_full().

Signed-off-by: Philippe Mathieu-Daudé <philmd@oss.qualcomm.com>
---
 include/hw/core/qdev.h | 5 +++++
 system/qdev-monitor.c  | 3 +++
 2 files changed, 8 insertions(+)

diff --git a/include/hw/core/qdev.h b/include/hw/core/qdev.h
index e1476223411..c1c17bd6f2b 100644
--- a/include/hw/core/qdev.h
+++ b/include/hw/core/qdev.h
@@ -345,6 +345,11 @@ struct BusClass {
      */
     bool (*check_address)(BusState *bus, DeviceState *dev, Error **errp);
 
+    /*
+     * Return whether more devices can be plugged into @bus.
+     */
+    bool (*is_full)(const BusState *bus);
+
     BusRealize realize;
     BusUnrealize unrealize;
 
diff --git a/system/qdev-monitor.c b/system/qdev-monitor.c
index 00fed791cce..496850bd8ed 100644
--- a/system/qdev-monitor.c
+++ b/system/qdev-monitor.c
@@ -454,6 +454,9 @@ static inline bool qbus_is_full(BusState *bus)
         return true;
     }
     bus_class = BUS_GET_CLASS(bus);
+    if (bus_class->is_full && bus_class->is_full(bus)) {
+        return true;
+    }
     return bus_class->max_dev && bus->num_children >= bus_class->max_dev;
 }
 
-- 
2.53.0