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[Qemu-ppc] [PATCH] spapr_rng: disable hotpluggability

From: Greg Kurz
Subject: [Qemu-ppc] [PATCH] spapr_rng: disable hotpluggability
Date: Thu, 25 Feb 2016 12:08:00 +0100
User-agent: StGit/0.17.1-dirty

It is currently possible to hotplug a spapr_rng device but QEMU crashes
when we try to hot unplug:

ERROR:hw/core/qdev.c:295:qdev_unplug: assertion failed: (hotplug_ctrl)

This happens because spapr_rng isn't plugged to any bus and sPAPR does
not provide hotplug support for it: qdev_get_hotplug_handler() hence
return NULL and we hit the assertion.

And anyway, it doesn't make much sense to unplug this device since hcalls
cannot be unregistered. Even the idea of hotplugging a RNG device instead
of declaring it on the QEMU command line looks weird.

This patch simply disables hotpluggability for the spapr-rng class.

Signed-off-by: Greg Kurz <address@hidden>
 hw/ppc/spapr_rng.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/hw/ppc/spapr_rng.c b/hw/ppc/spapr_rng.c
index 8484fcf54774..a39d472b66fd 100644
--- a/hw/ppc/spapr_rng.c
+++ b/hw/ppc/spapr_rng.c
@@ -170,6 +170,7 @@ static void spapr_rng_class_init(ObjectClass *oc, void 
     dc->realize = spapr_rng_realize;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
     dc->props = spapr_rng_properties;
+    dc->hotpluggable = false;
 static const TypeInfo spapr_rng_info = {

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