[Qemu-devel] [PULL 17/47] Access BusState::allow_hotplug using wraper qbus_is_hotpluggable()

["Andreas Färber" <afaerber@suse.de>]

From: Igor Mammedov <imammedo@redhat.com>

It would allow to transparently switch detection whether Bus
is hotpluggable from allow_hotplug field to hotplug_handler
link and to drop allow_hotplug field once all users are
converted to hotplug handler API.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 hw/core/qdev.c           | 6 +++---
 hw/i386/acpi-build.c     | 2 +-
 hw/pci/pci-hotplug-old.c | 4 ++--
 include/hw/qdev-core.h   | 5 +++++
 qdev-monitor.c           | 2 +-
 5 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 2b42d5b..df97003 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -86,7 +86,7 @@ static void bus_add_child(BusState *bus, DeviceState *child)
     BusChild *kid = g_malloc0(sizeof(*kid));
 
     if (qdev_hotplug) {
-        assert(bus->allow_hotplug);
+        assert(qbus_is_hotpluggable(bus));
     }
 
     kid->index = bus->max_index++;
@@ -213,7 +213,7 @@ void qdev_unplug(DeviceState *dev, Error **errp)
 {
     DeviceClass *dc = DEVICE_GET_CLASS(dev);
 
-    if (dev->parent_bus && !dev->parent_bus->allow_hotplug) {
+    if (dev->parent_bus && !qbus_is_hotpluggable(dev->parent_bus)) {
         error_set(errp, QERR_BUS_NO_HOTPLUG, dev->parent_bus->name);
         return;
     }
@@ -948,7 +948,7 @@ static bool device_get_hotpluggable(Object *obj, Error **errp)
     DeviceState *dev = DEVICE(obj);
 
     return dc->hotpluggable && (dev->parent_bus == NULL ||
-                                dev->parent_bus->allow_hotplug);
+                                qbus_is_hotpluggable(dev->parent_bus));
 }
 
 static bool device_get_hotplugged(Object *obj, Error **err)
diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index a313321..00be4bb 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -774,7 +774,7 @@ static void *acpi_set_bsel(PCIBus *bus, void *opaque)
     unsigned *bsel_alloc = opaque;
     unsigned *bus_bsel;
 
-    if (bus->qbus.allow_hotplug) {
+    if (qbus_is_hotpluggable(BUS(bus))) {
         bus_bsel = g_malloc(sizeof *bus_bsel);
 
         *bus_bsel = (*bsel_alloc)++;
diff --git a/hw/pci/pci-hotplug-old.c b/hw/pci/pci-hotplug-old.c
index d87c469..6ab28b7 100644
--- a/hw/pci/pci-hotplug-old.c
+++ b/hw/pci/pci-hotplug-old.c
@@ -77,7 +77,7 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
         return NULL;
     }
-    if (!((BusState*)bus)->allow_hotplug) {
+    if (!qbus_is_hotpluggable(BUS(bus))) {
         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
         return NULL;
     }
@@ -227,7 +227,7 @@ static PCIDevice *qemu_pci_hot_add_storage(Monitor *mon,
         monitor_printf(mon, "Invalid PCI device address %s\n", devaddr);
         return NULL;
     }
-    if (!((BusState*)bus)->allow_hotplug) {
+    if (!qbus_is_hotpluggable(BUS(bus))) {
         monitor_printf(mon, "PCI bus doesn't support hotplug\n");
         return NULL;
     }
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 178fee2..48a96d2 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -368,4 +368,9 @@ static inline void qbus_set_hotplug_handler(BusState *bus, DeviceState *handler,
                              QDEV_HOTPLUG_HANDLER_PROPERTY, errp);
     bus->allow_hotplug = 1;
 }
+
+static inline bool qbus_is_hotpluggable(BusState *bus)
+{
+   return bus->allow_hotplug || bus->hotplug_handler;
+}
 #endif
diff --git a/qdev-monitor.c b/qdev-monitor.c
index 5ec6606..f6db461 100644
--- a/qdev-monitor.c
+++ b/qdev-monitor.c
@@ -515,7 +515,7 @@ DeviceState *qdev_device_add(QemuOpts *opts)
             return NULL;
         }
     }
-    if (qdev_hotplug && bus && !bus->allow_hotplug) {
+    if (qdev_hotplug && bus && !qbus_is_hotpluggable(bus)) {
         qerror_report(QERR_BUS_NO_HOTPLUG, bus->name);
         return NULL;
     }
-- 
1.8.4.5