macio: Fix to realize "mos6522-cuda" and "mos6522-pmu" devices

cuda_init() creates a "mos6522-cuda" device, but it's never realized.
Affects machines mac99 with via=cuda (default) and g3beige.

pmu_init() creates a "mos6522-pmu" device, but it's never realized.
Affects machine mac99 with via=pmu and via=pmu-adb,

In theory, a device becomes real only on realize.  In practice, the
transition from unreal to real is a fuzzy one.  The work to make a
device real can be spread between realize methods (fine),
instance_init methods (wrong), and board code wiring up the device
(fine as long as it effectively happens on realize).  Depending on
what exactly is done where, a device can work even when we neglect
to realize it.

These two appear to work.  Nevertheless, it's a clear misuse of the
interface.  Even when it works today (more or less by chance), it can
break tomorrow.

Fix by realizing them in cuda_realize() and pmu_realize(),
respectively.

Fixes: 6dca62a0000f95e0b7020aa00d0ca9b2c421f341
Cc: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20200609122339.937862-10-armbru@redhat.com>

hw/misc/macio/cuda.c

@@ -33,6 +33,7 @@
 #include "hw/misc/macio/cuda.h"
 #include "qemu/timer.h"
 #include "sysemu/runstate.h"
+#include "qapi/error.h"
 #include "qemu/cutils.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
@@ -522,16 +523,20 @@ static void cuda_reset(DeviceState *dev)
 static void cuda_realize(DeviceState *dev, Error **errp)
 {
     CUDAState *s = CUDA(dev);
+    Error *err = NULL;
     SysBusDevice *sbd;
-    MOS6522State *ms;
-    DeviceState *d;
     struct tm tm;
 
+    object_property_set_bool(OBJECT(&s->mos6522_cuda), true, "realized",
+                             &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+
     /* Pass IRQ from 6522 */
-    d = DEVICE(&s->mos6522_cuda);
-    ms = MOS6522(d);
     sbd = SYS_BUS_DEVICE(s);
-    sysbus_pass_irq(sbd, SYS_BUS_DEVICE(ms));
+    sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->mos6522_cuda));
 
     qemu_get_timedate(&tm, 0);
     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;

hw/misc/macio/pmu.c

@@ -40,6 +40,7 @@
 #include "hw/misc/macio/pmu.h"
 #include "qemu/timer.h"
 #include "sysemu/runstate.h"
+#include "qapi/error.h"
 #include "qemu/cutils.h"
 #include "qemu/log.h"
 #include "qemu/module.h"
@@ -739,16 +740,20 @@ static void pmu_reset(DeviceState *dev)
 static void pmu_realize(DeviceState *dev, Error **errp)
 {
     PMUState *s = VIA_PMU(dev);
+    Error *err = NULL;
     SysBusDevice *sbd;
-    MOS6522State *ms;
-    DeviceState *d;
     struct tm tm;
 
+    object_property_set_bool(OBJECT(&s->mos6522_pmu), true, "realized",
+                             &err);
+    if (err) {
+        error_propagate(errp, err);
+        return;
+    }
+
     /* Pass IRQ from 6522 */
-    d = DEVICE(&s->mos6522_pmu);
-    ms = MOS6522(d);
     sbd = SYS_BUS_DEVICE(s);
-    sysbus_pass_irq(sbd, SYS_BUS_DEVICE(ms));
+    sysbus_pass_irq(sbd, SYS_BUS_DEVICE(&s->mos6522_pmu));
 
     qemu_get_timedate(&tm, 0);
     s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;