fix segfault while connecting to a new cable after probing a flash

http://blackfin.uclinux.org/gf/tracker/6028

git-svn-id: https://urjtag.svn.sourceforge.net/svnroot/urjtag/trunk@1790 b68d4a1b-bc3d-0410-92ed-d4ac073336b7

urjtag/ChangeLog

@@ -2,6 +2,14 @@
 
   * src/bus/s3c4510x.c: Punt dead/useless cvs log info.
 
+  * src/tap/cable.c (urj_tap_cable_create): Call urj_bus_buses_delete() rather
+    than manipulate urj_bus directly so the urj_buses structure doesn't get
+    corrupted.  Otherwise we segfault when changing cables after initializing a
+    bus: cable probe; detect; initbus ...; detectflash ...; cable probe; detect
+  * src/apps/jtag/jtag.c (cleanup): Call urj_bus_buses_free() to clean up all
+    buses and not just the active one.
+    http://blackfin.uclinux.org/gf/tracker/6028
+
 2010-06-14  Mike Frysinger  <vapier@gentoo.org>
 
   * configure.ac: Drop stropts.h check since parport code no longer uses it.

urjtag/src/apps/jtag/jtag.c

@@ -339,12 +339,7 @@ static void
 cleanup (urj_chain_t *chain)
 {
     urj_flash_cleanup ();
-
-    if (urj_bus)
-    {
-        URJ_BUS_FREE (urj_bus);
-        urj_bus = NULL;
-    }
+    urj_bus_buses_free ();
     urj_tap_chain_free (chain);
     chain = NULL;
 }

urjtag/src/tap/cable.c

@@ -539,10 +539,7 @@ urj_tap_cable_create (urj_chain_t *chain, const urj_cable_driver_t *driver)
     urj_cable_t *cable;
 
     if (urj_bus)
-    {
-        URJ_BUS_FREE (urj_bus);
-        urj_bus = NULL;
-    }
+        urj_bus_buses_delete (urj_bus);
 
     urj_tap_chain_disconnect (chain);