iscsi: do not fail to stop a stopped pool

Just as we allow stopping filesystem pools when they were unmounted
externally, do not fail to stop an iscsi pool when someone else
closed the session externally.

Reported at:
https://bugzilla.redhat.com/show_bug.cgi?id=1171984

diff --git a/src/storage/storage_backend_iscsi.c b/src/storage/storage_backend_iscsi.c
index 197d33381f6374f339681e45d9c47484a812b14d..9e2d01e457fb16a2eac6bf42e133e7498fdbe6d2 100644 (file)
--- a/src/storage/storage_backend_iscsi.c
+++ b/src/storage/storage_backend_iscsi.c
@@ -449,8 +449,13 @@ virStorageBackendISCSIStopPool(virConnectPtr conn ATTRIBUTE_UNUSED,
                                virStoragePoolObjPtr pool)
 {
     char *portal;
+    char *session;
     int ret = -1;
 
+    if ((session = virStorageBackendISCSISession(pool, true)) == NULL)
+        return 0;
+    VIR_FREE(session);
+
     if ((portal = virStorageBackendISCSIPortal(&pool->def->source)) == NULL)
         return -1;