Xen PCI passthru: convert to realize()

Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

hw/xen/xen_pt.c

@@ -760,10 +760,10 @@ static void xen_pt_destroy(PCIDevice *d) {
 }
 /* init */
 
-static int xen_pt_initfn(PCIDevice *d)
+static void xen_pt_realize(PCIDevice *d, Error **errp)
 {
     XenPCIPassthroughState *s = XEN_PT_DEVICE(d);
-    int rc = 0;
+    int i, rc = 0;
     uint8_t machine_irq = 0, scratch;
     uint16_t cmd = 0;
     int pirq = XEN_PT_UNASSIGNED_PIRQ;
@@ -781,8 +781,8 @@ static int xen_pt_initfn(PCIDevice *d)
                             &err);
     if (err) {
         error_append_hint(&err, "Failed to \"open\" the real pci device");
-        error_report_err(err);
-        return -1;
+        error_propagate(errp, err);
+        return;
     }
 
     s->is_virtfn = s->real_device.is_virtfn;
@@ -802,19 +802,19 @@ static int xen_pt_initfn(PCIDevice *d)
     if ((s->real_device.domain == 0) && (s->real_device.bus == 0) &&
         (s->real_device.dev == 2) && (s->real_device.func == 0)) {
         if (!is_igd_vga_passthrough(&s->real_device)) {
-            XEN_PT_ERR(d, "Need to enable igd-passthru if you're trying"
-                       " to passthrough IGD GFX.\n");
+            error_setg(errp, "Need to enable igd-passthru if you're trying"
+                    " to passthrough IGD GFX");
             xen_host_pci_device_put(&s->real_device);
-            return -1;
+            return;
         }
 
         xen_pt_setup_vga(s, &s->real_device, &err);
         if (err) {
             error_append_hint(&err, "Setup VGA BIOS of passthrough"
                     " GFX failed");
-            error_report_err(err);
+            error_propagate(errp, err);
             xen_host_pci_device_put(&s->real_device);
-            return -1;
+            return;
         }
 
         /* Register ISA bridge for passthrough GFX. */
@@ -836,20 +836,19 @@ static int xen_pt_initfn(PCIDevice *d)
     /* Bind interrupt */
     rc = xen_host_pci_get_byte(&s->real_device, PCI_INTERRUPT_PIN, &scratch);
     if (rc) {
-        XEN_PT_ERR(d, "Failed to read PCI_INTERRUPT_PIN! (rc:%d)\n", rc);
+        error_setg_errno(errp, errno, "Failed to read PCI_INTERRUPT_PIN");
         goto err_out;
     }
     if (!scratch) {
-        XEN_PT_LOG(d, "no pin interrupt\n");
+        error_setg(errp, "no pin interrupt");
         goto out;
     }
 
     machine_irq = s->real_device.irq;
     rc = xc_physdev_map_pirq(xen_xc, xen_domid, machine_irq, &pirq);
-
     if (rc < 0) {
-        XEN_PT_ERR(d, "Mapping machine irq %u to pirq %i failed, (err: %d)\n",
-                   machine_irq, pirq, errno);
+        error_setg_errno(errp, errno, "Mapping machine irq %u to"
+                         " pirq %i failed", machine_irq, pirq);
 
         /* Disable PCI intx assertion (turn on bit10 of devctl) */
         cmd |= PCI_COMMAND_INTX_DISABLE;
@@ -870,8 +869,8 @@ static int xen_pt_initfn(PCIDevice *d)
                                        PCI_SLOT(d->devfn),
                                        e_intx);
         if (rc < 0) {
-            XEN_PT_ERR(d, "Binding of interrupt %i failed! (err: %d)\n",
-                       e_intx, errno);
+            error_setg_errno(errp, errno, "Binding of interrupt %u failed",
+                             e_intx);
 
             /* Disable PCI intx assertion (turn on bit10 of devctl) */
             cmd |= PCI_COMMAND_INTX_DISABLE;
@@ -879,8 +878,8 @@ static int xen_pt_initfn(PCIDevice *d)
 
             if (xen_pt_mapped_machine_irq[machine_irq] == 0) {
                 if (xc_physdev_unmap_pirq(xen_xc, xen_domid, machine_irq)) {
-                    XEN_PT_ERR(d, "Unmapping of machine interrupt %i failed!"
-                               " (err: %d)\n", machine_irq, errno);
+                    error_setg_errno(errp, errno, "Unmapping of machine"
+                            " interrupt %u failed", machine_irq);
                 }
             }
             s->machine_irq = 0;
@@ -893,14 +892,14 @@ out:
 
         rc = xen_host_pci_get_word(&s->real_device, PCI_COMMAND, &val);
         if (rc) {
-            XEN_PT_ERR(d, "Failed to read PCI_COMMAND! (rc: %d)\n", rc);
+            error_setg_errno(errp, errno, "Failed to read PCI_COMMAND");
             goto err_out;
         } else {
             val |= cmd;
             rc = xen_host_pci_set_word(&s->real_device, PCI_COMMAND, val);
             if (rc) {
-                XEN_PT_ERR(d, "Failed to write PCI_COMMAND val=0x%x!(rc: %d)\n",
-                           val, rc);
+                error_setg_errno(errp, errno, "Failed to write PCI_COMMAND"
+                                 " val = 0x%x", val);
                 goto err_out;
             }
         }
@@ -910,15 +909,19 @@ out:
     memory_listener_register(&s->io_listener, &address_space_io);
     s->listener_set = true;
     XEN_PT_LOG(d,
-               "Real physical device %02x:%02x.%d registered successfully!\n",
+               "Real physical device %02x:%02x.%d registered successfully\n",
                s->hostaddr.bus, s->hostaddr.slot, s->hostaddr.function);
 
-    return 0;
+    return;
 
 err_out:
+    for (i = 0; i < PCI_ROM_SLOT; i++) {
+        object_unparent(OBJECT(&s->bar[i]));
+    }
+    object_unparent(OBJECT(&s->rom));
+
     xen_pt_destroy(d);
     assert(rc);
-    return rc;
 }
 
 static void xen_pt_unregister_device(PCIDevice *d)
@@ -937,7 +940,7 @@ static void xen_pci_passthrough_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 
-    k->init = xen_pt_initfn;
+    k->realize = xen_pt_realize;
     k->exit = xen_pt_unregister_device;
     k->config_read = xen_pt_pci_read_config;
     k->config_write = xen_pt_pci_write_config;