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Revert "qdev: Free QemuOpts when the QOM path goes away" 

This reverts commit abed886ec6.

This patch originally addressed an issue where a DEVICE_DELETED
event could be emitted (in device_unparent()) before a Device's
QemuOpts were cleaned up (in device_finalize()), leading to a
"duplicate ID" error if management attempted to immediately add
a device with the same ID in response to the DEVICE_DELETED event.

An alternative will be implemented in a subsequent patch where we
defer the DEVICE_DELETED event until device_finalize(), which would
also prevent the race, so we revert the original fix in preparation.

Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Message-Id: <20171016222315.407-3-mdroth@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Michael Roth 2017-10-16 17:23:14 -05:00 committed by Paolo Bonzini
parent 04162f8f4b
commit 2fc06c4ac6
1 changed files with 1 additions and 3 deletions
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4
hw/core/qdev.c
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@ -1069,6 +1069,7 @@ static void device_finalize(Object *obj)
NamedGPIOList *ngl, *next;
DeviceState *dev = DEVICE(obj);
qemu_opts_del(dev->opts);
QLIST_FOREACH_SAFE(ngl, &dev->gpios, node, next) {
QLIST_REMOVE(ngl, node);
@ -1118,9 +1119,6 @@ static void device_unparent(Object *obj)
g_free(dev->canonical_path);
dev->canonical_path = NULL;
}
qemu_opts_del(dev->opts);
dev->opts = NULL;
}
static void device_class_init(ObjectClass *class, void *data)