vpn: Check whether we have already removed the provider

The dbus messages from vpnd might come in different order so make
sure we are not trying to access already removed provider.

diff --git a/plugins/vpn.c b/plugins/vpn.c
index f15796d..04318a9 100644 (file)
--- a/plugins/vpn.c
+++ b/plugins/vpn.c
@@ -796,6 +796,14 @@ static int provider_remove(struct connman_provider *provider)
 
        DBG("provider %p data %p", provider, data);
 
+       if (data == NULL) {
+               /*
+                * This means the provider is already removed,
+                * just ignore the dbus in this case.
+                */
+               return -EALREADY;
+       }
+
        /*
         * When provider.c:provider_remove() calls this function,
         * it will remove the provider itself after the call.