hw/ppc/spapr_iommu: Fix crash when removing the "spapr-tce-table" device

QEMU currently aborts unexpectedly when the user tries to add and
remove a "spapr-tce-table" device:

$ qemu-system-ppc64 -nographic -S -nodefaults -monitor stdio
QEMU 2.9.92 monitor - type 'help' for more information
(qemu) device_add spapr-tce-table,id=x
(qemu) device_del x
**
ERROR:qemu/qdev-monitor.c:872:qdev_unplug: assertion failed: (hotplug_ctrl)
Aborted (core dumped)

The device should not be accessable for the users at all, it's just
used internally, so mark it with user_creatable = false.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
(cherry picked from commit 1f98e55385d11da1dc0de6440e66f19d191d2a1b)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index ae30bbe30f31050263367e16895f24ad93d7222c..c818d45dc7be795635e68e126f8ea1f7b3a4052d 100644 (file)
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -618,6 +618,8 @@ static void spapr_tce_table_class_init(ObjectClass *klass, void *data)
     dc->init = spapr_tce_table_realize;
     dc->reset = spapr_tce_reset;
     dc->unrealize = spapr_tce_table_unrealize;
+    /* Reason: This is just an internal device for handling the hypercalls */
+    dc->user_creatable = false;
 
     QLIST_INIT(&spapr_tce_tables);