qdev: Move global validation to a single function

Currently GlobalProperty.not_used=false has multiple meanings:

* It may be a property for a hotpluggable device, which may or may not
  have been used by a device;
* It may be a machine-type-provided property, which may or may not have
  been used by a device.
* It may be a user-provided property that was actually not used by
  any device.

Simplify the logic by having two separate fields: 'user_provided' and
'used'. This allows the entire global property validation logic to be
contained in a single function, and allows more specific error messages.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 1 insertions, 17 deletions

diff --git a/hw/core/qdev-properties-system.c b/hw/core/qdev-properties-system.c
index ae0900f651..84caa1d694 100644
--- a/hw/core/qdev-properties-system.c
+++ b/hw/core/qdev-properties-system.c
@@ -388,28 +388,12 @@ void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
 static int qdev_add_one_global(QemuOpts *opts, void *opaque)
 {
     GlobalProperty *g;
-    ObjectClass *oc;
 
     g = g_malloc0(sizeof(*g));
     g->driver   = qemu_opt_get(opts, "driver");
     g->property = qemu_opt_get(opts, "property");
     g->value    = qemu_opt_get(opts, "value");
-    oc = object_class_dynamic_cast(object_class_by_name(g->driver),
-                                   TYPE_DEVICE);
-    if (oc) {
-        DeviceClass *dc = DEVICE_CLASS(oc);
-
-        if (dc->hotpluggable) {
-            /* If hotpluggable then skip not_used checking. */
-            g->not_used = false;
-        } else {
-            /* Maybe a typo. */
-            g->not_used = true;
-        }
-    } else {
-        /* Maybe a typo. */
-        g->not_used = true;
-    }
+    g->user_provided = true;
     qdev_prop_register_global(g);
     return 0;
 }