[Qemu-devel] [PATCH qom-next for-1.6 v2] fdc: Fix inheritence for SUNW, fdtwo

["Andreas Färber" <afaerber@suse.de>]

Since commit dd3be7420774f7dc8f37a96ca24d07f0b6f31b3b SUNW,fdtwo's
initfn (realizefn since 940194c2369e50d91d1abf6f36d43853eea5e539)
was using SYSBUS_FDC() cast. This uses type sysbus-fdc rather than
SUNW,fdtwo.

Fix this by letting SUNW,fdtwo and sysbus-fdc both inherit from an
abstract type base-sysbus-fdc.

This allows to consolidate realizefns by using instance_init functions.
Clean up variable names and variable order while at it.

Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: Hu Tao <hutao@cn.fujitsu.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 hw/block/fdc.c | 86 +++++++++++++++++++++++++++++-----------------------------
 1 file changed, 43 insertions(+), 43 deletions(-)

diff --git a/hw/block/fdc.c b/hw/block/fdc.c
index d32f6ba..723d2c7 100644
--- a/hw/block/fdc.c
+++ b/hw/block/fdc.c
@@ -544,7 +544,7 @@ struct FDCtrl {
     uint8_t timer1;
 };
 
-#define TYPE_SYSBUS_FDC "sysbus-fdc"
+#define TYPE_SYSBUS_FDC "base-sysbus-fdc"
 #define SYSBUS_FDC(obj) OBJECT_CHECK(FDCtrlSysBus, (obj), TYPE_SYSBUS_FDC)
 
 typedef struct FDCtrlSysBus {
@@ -2153,60 +2153,49 @@ static void isabus_fdc_realize(DeviceState *dev, Error **errp)
 
 static void sysbus_fdc_initfn(Object *obj)
 {
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
     FDCtrlSysBus *sys = SYSBUS_FDC(obj);
     FDCtrl *fdctrl = &sys->state;
 
+    fdctrl->dma_chann = -1;
+
     memory_region_init_io(&fdctrl->iomem, obj, &fdctrl_mem_ops, fdctrl,
                           "fdc", 0x08);
+    sysbus_init_mmio(sbd, &fdctrl->iomem);
 }
 
-static void sysbus_fdc_realize(DeviceState *dev, Error **errp)
+static void sun4m_fdc_initfn(Object *obj)
 {
-    FDCtrlSysBus *sys = SYSBUS_FDC(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+    FDCtrlSysBus *sys = SYSBUS_FDC(obj);
     FDCtrl *fdctrl = &sys->state;
-    SysBusDevice *b = SYS_BUS_DEVICE(dev);
-    Error *err = NULL;
 
-    sysbus_init_mmio(b, &fdctrl->iomem);
-    sysbus_init_irq(b, &fdctrl->irq);
-    qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
-    fdctrl->dma_chann = -1;
+    fdctrl->sun4m = 1;
 
-    qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */
-    fdctrl_realize_common(fdctrl, &err);
-    if (err != NULL) {
-        error_propagate(errp, err);
-        return;
-    }
+    memory_region_init_io(&fdctrl->iomem, obj, &fdctrl_mem_strict_ops,
+                          fdctrl, "fdctrl", 0x08);
+    sysbus_init_mmio(sbd, &fdctrl->iomem);
 }
 
-static void sun4m_fdc_initfn(Object *obj)
+static void sysbus_fdc_common_initfn(Object *obj)
 {
+    DeviceState *dev = DEVICE(obj);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     FDCtrlSysBus *sys = SYSBUS_FDC(obj);
     FDCtrl *fdctrl = &sys->state;
 
-    memory_region_init_io(&fdctrl->iomem, obj, &fdctrl_mem_strict_ops,
-                          fdctrl, "fdctrl", 0x08);
+    qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */
+
+    sysbus_init_irq(sbd, &fdctrl->irq);
+    qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
 }
 
-static void sun4m_fdc_realize(DeviceState *dev, Error **errp)
+static void sysbus_fdc_common_realize(DeviceState *dev, Error **errp)
 {
     FDCtrlSysBus *sys = SYSBUS_FDC(dev);
     FDCtrl *fdctrl = &sys->state;
-    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
-    Error *err = NULL;
 
-    sysbus_init_mmio(sbd, &fdctrl->iomem);
-    sysbus_init_irq(sbd, &fdctrl->irq);
-    qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
-
-    fdctrl->sun4m = 1;
-    qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */
-    fdctrl_realize_common(fdctrl, &err);
-    if (err != NULL) {
-        error_propagate(errp, err);
-        return;
-    }
+    fdctrl_realize_common(fdctrl, errp);
 }
 
 FDriveType isa_fdc_get_drive_type(ISADevice *fdc, int i)
@@ -2278,16 +2267,12 @@ static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    dc->realize = sysbus_fdc_realize;
-    dc->reset = fdctrl_external_reset_sysbus;
-    dc->vmsd = &vmstate_sysbus_fdc;
     dc->props = sysbus_fdc_properties;
 }
 
 static const TypeInfo sysbus_fdc_info = {
-    .name          = TYPE_SYSBUS_FDC,
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(FDCtrlSysBus),
+    .name          = "sysbus-fdc",
+    .parent        = TYPE_SYSBUS_FDC,
     .instance_init = sysbus_fdc_initfn,
     .class_init    = sysbus_fdc_class_init,
 };
@@ -2301,23 +2286,38 @@ static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
-    dc->realize = sun4m_fdc_realize;
-    dc->reset = fdctrl_external_reset_sysbus;
-    dc->vmsd = &vmstate_sysbus_fdc;
     dc->props = sun4m_fdc_properties;
 }
 
 static const TypeInfo sun4m_fdc_info = {
     .name          = "SUNW,fdtwo",
-    .parent        = TYPE_SYS_BUS_DEVICE,
-    .instance_size = sizeof(FDCtrlSysBus),
+    .parent        = TYPE_SYSBUS_FDC,
     .instance_init = sun4m_fdc_initfn,
     .class_init    = sun4m_fdc_class_init,
 };
 
+static void sysbus_fdc_common_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->realize = sysbus_fdc_common_realize;
+    dc->reset = fdctrl_external_reset_sysbus;
+    dc->vmsd = &vmstate_sysbus_fdc;
+}
+
+static const TypeInfo sysbus_fdc_type_info = {
+    .name          = TYPE_SYSBUS_FDC,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(FDCtrlSysBus),
+    .instance_init = sysbus_fdc_common_initfn,
+    .abstract      = true,
+    .class_init    = sysbus_fdc_common_class_init,
+};
+
 static void fdc_register_types(void)
 {
     type_register_static(&isa_fdc_info);
+    type_register_static(&sysbus_fdc_type_info);
     type_register_static(&sysbus_fdc_info);
     type_register_static(&sun4m_fdc_info);
 }
-- 
1.8.1.4