ocfs2_dlm: Add missing locks in dlm_empty_lockres

__dlm_lockres_unused() expects the caller to take the lockres spinlock.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 77e4e6169a0d..9229e04362f6 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -2730,14 +2730,17 @@ int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res)
         int ret;
         int lock_dropped = 0;
 
+        spin_lock(&res->spinlock);
         if (res->owner != dlm->node_num) {
                 if (!__dlm_lockres_unused(res)) {
                         mlog(ML_ERROR, "%s:%.*s: this node is not master, "
                              "trying to free this but locks remain\n",
                              dlm->name, res->lockname.len, res->lockname.name);
                 }
+                spin_unlock(&res->spinlock);
                 goto leave;
         }
+        spin_unlock(&res->spinlock);
 
         /* Wheee! Migrate lockres here! Will sleep so drop spinlock. */
         spin_unlock(&dlm->spinlock);