[Qemu-devel] [PATCH 1/3] hw/pci-bridge: modify pxb_dev_init_common

[Wei Jiangang <weijg.fnst@cn.fujitsu.com>]

1) add Error **errp parameter for it,
2) rename pxb_dev_init_common to pxb_dev_realize_common,
   and prepare for pxb/pxb-pcie convert to realize.
3) modify the callers,
   including pxb_dev_initfn and pxb_pcie_dev_initfn.

Signed-off-by: Wei Jiangang <weijg.fnst@cn.fujitsu.com>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
---
 hw/pci-bridge/pci_expander_bridge.c | 56 ++++++++++++++++++++++++-------------
 1 file changed, 37 insertions(+), 19 deletions(-)

diff --git a/hw/pci-bridge/pci_expander_bridge.c b/hw/pci-bridge/pci_expander_bridge.c
index d23b8da..ce5baf8 100644
--- a/hw/pci-bridge/pci_expander_bridge.c
+++ b/hw/pci-bridge/pci_expander_bridge.c
@@ -160,30 +160,25 @@ static const TypeInfo pxb_host_info = {
 };
 
 /*
- * Registers the PXB bus as a child of the i440fx root bus.
- *
- * Returns 0 on successs, -1 if i440fx host was not
- * found or the bus number is already in use.
+ * Registers the PXB bus as a child of pci host root bus.
  */
-static int pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus)
+static void pxb_register_bus(PCIDevice *dev, PCIBus *pxb_bus, Error **errp)
 {
     PCIBus *bus = dev->bus;
     int pxb_bus_num = pci_bus_num(pxb_bus);
 
     if (bus->parent_dev) {
-        error_report("PXB devices can be attached only to root bus.");
-        return -1;
+        error_setg(errp, "PXB devices can be attached only to root bus.");
+        return;
     }
 
     QLIST_FOREACH(bus, &bus->child, sibling) {
         if (pci_bus_num(bus) == pxb_bus_num) {
-            error_report("Bus %d is already in use.", pxb_bus_num);
-            return -1;
+            error_setg(errp, "Bus %d is already in use.", pxb_bus_num);
+            return;
         }
     }
     QLIST_INSERT_HEAD(&dev->bus->child, pxb_bus, sibling);
-
-    return 0;
 }
 
 static int pxb_map_irq_fn(PCIDevice *pci_dev, int pin)
@@ -213,7 +208,7 @@ static gint pxb_compare(gconstpointer a, gconstpointer b)
            0;
 }
 
-static int pxb_dev_init_common(PCIDevice *dev, bool pcie)
+static void pxb_dev_realize_common(PCIDevice *dev, bool pcie, Error **errp)
 {
     PXBDev *pxb = convert_to_pxb(dev);
     DeviceState *ds, *bds = NULL;
@@ -222,8 +217,8 @@ static int pxb_dev_init_common(PCIDevice *dev, bool pcie)
 
     if (pxb->numa_node != NUMA_NODE_UNASSIGNED &&
         pxb->numa_node >= nb_numa_nodes) {
-        error_report("Illegal numa node %d.", pxb->numa_node);
-        return -EINVAL;
+        error_setg(errp, "Illegal numa node %d.", pxb->numa_node);
+        return;
     }
 
     if (dev->qdev.id && *dev->qdev.id) {
@@ -248,8 +243,9 @@ static int pxb_dev_init_common(PCIDevice *dev, bool pcie)
 
     PCI_HOST_BRIDGE(ds)->bus = bus;
 
-    if (pxb_register_bus(dev, bus)) {
-        return -EINVAL;
+    pxb_register_bus(dev, bus, errp);
+    if (*errp) {
+        goto err_register_bus;
     }
 
     qdev_init_nofail(ds);
@@ -262,17 +258,31 @@ static int pxb_dev_init_common(PCIDevice *dev, bool pcie)
     pci_config_set_class(dev->config, PCI_CLASS_BRIDGE_HOST);
 
     pxb_dev_list = g_list_insert_sorted(pxb_dev_list, pxb, pxb_compare);
-    return 0;
+
+    return;
+
+err_register_bus:
+    object_unref(OBJECT(bds));
+    object_unparent(OBJECT(bus));
+    object_unref(OBJECT(ds));
 }
 
 static int pxb_dev_initfn(PCIDevice *dev)
 {
+    Error *err = NULL;
+
     if (pci_bus_is_express(dev->bus)) {
         error_report("pxb devices cannot reside on a PCIe bus!");
         return -EINVAL;
     }
 
-    return pxb_dev_init_common(dev, false);
+    pxb_dev_realize_common(dev, false, &err);
+    if (err) {
+        error_report_err(err);
+        return -EINVAL;
+    }
+
+    return 0;
 }
 
 static void pxb_dev_exitfn(PCIDevice *pci_dev)
@@ -314,12 +324,20 @@ static const TypeInfo pxb_dev_info = {
 
 static int pxb_pcie_dev_initfn(PCIDevice *dev)
 {
+    Error *err = NULL;
+
     if (!pci_bus_is_express(dev->bus)) {
         error_report("pxb-pcie devices cannot reside on a PCI bus!");
         return -EINVAL;
     }
 
-    return pxb_dev_init_common(dev, true);
+    pxb_dev_realize_common(dev, true, &err);
+    if (err) {
+        error_report_err(err);
+        return -EINVAL;
+    }
+
+    return 0;
 }
 
 static void pxb_pcie_dev_class_init(ObjectClass *klass, void *data)
-- 
1.9.3