Avoid unloading res_smdi twice.

(closes issue #17237)
Reported by: pabelanger

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@268653 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/res/res_smdi.c b/res/res_smdi.c
index fcd715515581f7d95810a76b4f0eea1ea690f105..fe99cc9ea78ff9771380d522383bbc81dc7c8f25 100644 (file)
--- a/res/res_smdi.c
+++ b/res/res_smdi.c
@@ -152,6 +152,7 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  ***/
 
 static const char config_file[] = "smdi.conf";
+static int smdi_loaded;
 
 /*! \brief SMDI message desk message queue. */
 struct ast_smdi_md_queue {
@@ -1394,6 +1395,7 @@ static int _unload_module(int fromload);
 static int load_module(void)
 {
        int res;
+       smdi_loaded = 1;
 
        /* initialize our containers */
        memset(&smdi_ifaces, 0, sizeof(smdi_ifaces));
@@ -1421,6 +1423,10 @@ static int load_module(void)
 
 static int _unload_module(int fromload)
 {
+       if (!smdi_loaded) {
+               return 0;
+       }
+
        /* this destructor stops any running smdi_read threads */
        ASTOBJ_CONTAINER_DESTROYALL(&smdi_ifaces, ast_smdi_interface_destroy);
        ASTOBJ_CONTAINER_DESTROY(&smdi_ifaces);
@@ -1441,6 +1447,7 @@ static int _unload_module(int fromload)
                ast_custom_function_unregister(&smdi_msg_function);
        }
 
+       smdi_loaded = 0;
        return 0;
 }