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[PULL,1/8] spapr_rng: disable hotpluggability

Message ID 1456729111-16797-2-git-send-email-david@gibson.dropbear.id.au (mailing list archive)
State New, archived
Headers show

Commit Message

David Gibson Feb. 29, 2016, 6:58 a.m. UTC 
From: Greg Kurz <gkurz@linux.vnet.ibm.com>

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)
Aborted

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 <gkurz@linux.vnet.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---
 hw/ppc/spapr_rng.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/hw/ppc/spapr_rng.c b/hw/ppc/spapr_rng.c
index 8484fcf..a39d472 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 *data)
     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 = {