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qdev: add "check if address free" callback for buses

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Check if an address is free on the bus before plugging in the
device.  This makes it possible to do the check without any
side effects, and to detect the problem early without having
to do it in the realize callback.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20201006123904.610658-5-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-10-06 15:38:55 +03:00
parent d8a18da56d
commit bb755ba47f
4 changed files with 30 additions and 5 deletions
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2
hw/net/virtio-net.c
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@ -3138,7 +3138,7 @@ static bool failover_replug_primary(VirtIONet *n, Error **errp)
error_setg(errp, "virtio_net: couldn't find primary bus");
return false;
}
qdev_set_parent_bus(n->primary_dev, n->primary_bus);
qdev_set_parent_bus(n->primary_dev, n->primary_bus, &error_abort);
n->primary_should_be_hidden = false;
if (!qemu_opt_set_bool(n->primary_device_opts,
"partially_hotplugged", true, errp)) {