qemu/qdev: type safety in reset handler

Add type safety to qdev reset handlers, by declaring them as
DeviceState * rather than void *.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

hw/qdev.c

@@ -222,6 +222,13 @@ DeviceState *qdev_device_add(QemuOpts *opts)
     return qdev;
 }
 
+static void qdev_reset(void *opaque)
+{
+    DeviceState *dev = opaque;
+    if (dev->info->reset)
+        dev->info->reset(dev);
+}
+
 /* Initialize a device.  Device properties should be set before calling
    this function.  IRQs and MMIO regions should be connected/mapped after
    calling this function.  */
@@ -233,8 +240,7 @@ int qdev_init(DeviceState *dev)
     rc = dev->info->init(dev, dev->info);
     if (rc < 0)
         return rc;
-    if (dev->info->reset)
-        qemu_register_reset(dev->info->reset, dev);
+    qemu_register_reset(qdev_reset, dev);
     if (dev->info->vmsd)
         vmstate_register(-1, dev->info->vmsd, dev);
     dev->state = DEV_STATE_INITIALIZED;
@@ -273,13 +279,12 @@ void qdev_free(DeviceState *dev)
         if (dev->info->vmsd)
             vmstate_unregister(dev->info->vmsd, dev);
 #endif
-        if (dev->info->reset)
-            qemu_unregister_reset(dev->info->reset, dev);
         if (dev->info->exit)
             dev->info->exit(dev);
         if (dev->opts)
             qemu_opts_del(dev->opts);
     }
+    qemu_unregister_reset(qdev_reset, dev);
     QLIST_REMOVE(dev, sibling);
     qemu_free(dev);
 }

hw/qdev.h

@@ -115,6 +115,7 @@ BusState *qdev_get_child_bus(DeviceState *dev, const char *name);
 
 typedef int (*qdev_initfn)(DeviceState *dev, DeviceInfo *info);
 typedef int (*qdev_event)(DeviceState *dev);
+typedef void (*qdev_resetfn)(DeviceState *dev);
 
 struct DeviceInfo {
     const char *name;
@@ -125,7 +126,7 @@ struct DeviceInfo {
     int no_user;
 
     /* callbacks */
-    QEMUResetHandler *reset;
+    qdev_resetfn reset;
 
     /* device state */
     const VMStateDescription *vmsd;

hw/rtl8139.c

@@ -1173,9 +1173,9 @@ static void rtl8139_reset_rxring(RTL8139State *s, uint32_t bufferSize)
     s->RxBufAddr = 0;
 }
 
-static void rtl8139_reset(void *opaque)
+static void rtl8139_reset(DeviceState *d)
 {
-    RTL8139State *s = opaque;
+    RTL8139State *s = container_of(d, RTL8139State, dev.qdev);
     int i;
 
     /* restore MAC address */
@@ -1371,7 +1371,7 @@ static void rtl8139_ChipCmd_write(RTL8139State *s, uint32_t val)
     if (val & CmdReset)
     {
         DEBUG_PRINT(("RTL8139: ChipCmd reset\n"));
-        rtl8139_reset(s);
+        rtl8139_reset(&s->dev.qdev);
     }
     if (val & CmdRxEnb)
     {
@@ -1544,7 +1544,7 @@ static void rtl8139_Cfg9346_write(RTL8139State *s, uint32_t val)
     } else if (opmode == 0x40) {
         /* Reset.  */
         val = 0;
-        rtl8139_reset(s);
+        rtl8139_reset(&s->dev.qdev);
     }
 
     s->Cfg9346 = val;
@@ -3464,7 +3464,7 @@ static int pci_rtl8139_init(PCIDevice *dev)
                            PCI_ADDRESS_SPACE_MEM, rtl8139_mmio_map);
 
     qdev_get_macaddr(&dev->qdev, s->macaddr);
-    rtl8139_reset(s);
+    rtl8139_reset(&s->dev.qdev);
     s->vc = qdev_get_vlan_client(&dev->qdev,
                                  rtl8139_can_receive, rtl8139_receive, NULL,
                                  rtl8139_cleanup, s);

hw/tcx.c

@@ -411,9 +411,9 @@ static const VMStateDescription vmstate_tcx = {
     }
 };
 
-static void tcx_reset(void *opaque)
+static void tcx_reset(DeviceState *d)
 {
-    TCXState *s = opaque;
+    TCXState *s = container_of(d, TCXState, busdev.qdev);
 
     /* Initialize palette */
     memset(s->r, 0, 256);
@@ -560,7 +560,7 @@ static int tcx_init1(SysBusDevice *dev)
                                      tcx_screen_dump, NULL, s);
     }
 
-    tcx_reset(s);
+    tcx_reset(&s->busdev.qdev);
     qemu_console_resize(s->ds, s->width, s->height);
     return 0;
 }