From: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Date: Fri, 26 Sep 2014 05:19:19 +0000 (-0700)
Subject: qom: Allow clearing of a Link property
X-Git-Tag: Tizen_Studio_1.3_Release_p2.3.2~209^2~501^2~23
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d3c4931647c16c2ffc09a2c7c80d71c73cd026c6;p=sdk%2Femulator%2Fqemu.git

qom: Allow clearing of a Link property

By passing in "" to object_property_set_link.

The lead user of this is the QDEV GPIO framework which will implement
GPIO disconnects via an "unlink".  GPIO disconnection is used by
qtest's irq_intercept_out command.

Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/qom/object.c b/qom/object.c
index a751367e61..c7ef776b4e 100644
--- a/qom/object.c
+++ b/qom/object.c
@@ -872,9 +872,13 @@ char *object_property_get_str(Object *obj, const char *name,
 void object_property_set_link(Object *obj, Object *value,
                               const char *name, Error **errp)
 {
-    gchar *path = object_get_canonical_path(value);
-    object_property_set_str(obj, path, name, errp);
-    g_free(path);
+    if (value) {
+        gchar *path = object_get_canonical_path(value);
+        object_property_set_str(obj, path, name, errp);
+        g_free(path);
+    } else {
+        object_property_set_str(obj, "", name, errp);
+    }
 }
 
 Object *object_property_get_link(Object *obj, const char *name,