[Qemu-devel] [PATCH RFC 7/9] vt82c686: Document why cannot_instantiate_with_device_add_yet

[armbru]

From: Markus Armbruster <address@hidden>

A VT82C686B southbridge has multiple functions.  We model each
function as a separate qdev.  One of them need some special wiring set
up in mips_fulong2e_init() to work: the ISA bridge at 05.0.

Additionally, the IDE controller at 05.1 has always had
cannot_instantiate_with_device_add_yet set, but it's not obvious to me
why, so keep /* FIXME explain why */ for them.

Signed-off-by: Markus Armbruster <address@hidden>
---
 hw/isa/vt82c686.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/hw/isa/vt82c686.c b/hw/isa/vt82c686.c
index 3e8ec80..ec7c259 100644
--- a/hw/isa/vt82c686.c
+++ b/hw/isa/vt82c686.c
@@ -480,8 +480,12 @@ static void via_class_init(ObjectClass *klass, void *data)
     k->class_id = PCI_CLASS_BRIDGE_ISA;
     k->revision = 0x40;
     dc->desc = "ISA bridge";
-    dc->cannot_instantiate_with_device_add_yet = true; /* FIXME explain why */
     dc->vmsd = &vmstate_via;
+    /*
+     * Reason: part of VIA VT82C686 southbridge, needs to be wired up,
+     * e.g. by mips_fulong2e_init()
+     */
+    dc->cannot_instantiate_with_device_add_yet = true;
 }
 
 static const TypeInfo via_info = {
-- 
1.8.1.4