Avoid insertion of link_layer duplicate.

Signed-off-by: Nobuhiko Tanibata <NOBUHIKO_TANIBATA@xddp.denso.co.jp>

1 files changed, 14 insertions, 2 deletions

diff --git a/ivi-shell/ivi-layout.c b/ivi-shell/ivi-layout.c
index af84eb63..cb1b72b4 100644
--- a/ivi-shell/ivi-layout.c
+++ b/ivi-shell/ivi-layout.c
@@ -251,8 +251,20 @@ static void
 add_link_to_surface(struct ivi_layout_layer *ivilayer,
                     struct link_layer *link_layer)
 {
-    wl_list_init(&link_layer->link_to_layer);
-    wl_list_insert(&ivilayer->link_to_surface, &link_layer->link_to_layer);
+    struct link_layer *link = NULL;
+    int found = 0;
+
+    wl_list_for_each(link, &ivilayer->link_to_surface, link_to_layer) {
+        if (link == link_layer) {
+            found = 1;
+            break;
+        }
+    }
+
+    if (found == 0) {
+        wl_list_init(&link_layer->link_to_layer);
+        wl_list_insert(&ivilayer->link_to_surface, &link_layer->link_to_layer);
+    }
 }
 
 static void