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[PATCH-for-5.1 v2] hw/isa/isa-superio: Fix IDE controller realization

From: Philippe Mathieu-Daudé
Subject: [PATCH-for-5.1 v2] hw/isa/isa-superio: Fix IDE controller realization
Date: Tue, 21 Jul 2020 14:45:16 +0200

When realizing a Super I/O with IDE controller [*], we get:

  qom/object.c:1684: object_property_try_add_child: Assertion `!child->parent' 
  Aborted (core dumped)

This is because the device is already realized when we try to
add the QOM property to the parent. Fix by realizing *after*
adding the QOM relationship.

[*] Set ISASuperIOClass::ide.count = N with N not zero
    (no such thing currently exists; the bug is latent)

Fixes: e508430619 ("hw/isa/superio: Make the components QOM children")
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
v2: Reword bug is latent (Markus)
 hw/isa/isa-superio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/isa/isa-superio.c b/hw/isa/isa-superio.c
index e2e47d8fd9..179c185695 100644
--- a/hw/isa/isa-superio.c
+++ b/hw/isa/isa-superio.c
@@ -158,8 +158,8 @@ static void isa_superio_realize(DeviceState *dev, Error 
         if (k->ide.get_irq) {
             qdev_prop_set_uint32(d, "irq", k->ide.get_irq(sio, 0));
-        isa_realize_and_unref(isa, bus, &error_fatal);
         object_property_add_child(OBJECT(sio), "isa-ide", OBJECT(isa));
+        isa_realize_and_unref(isa, bus, &error_fatal);
         sio->ide = isa;
                                  k->ide.get_iobase ?

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