From: Sunil Mushran <sunil.mushran@oracle.com>
Date: Mon, 12 Mar 2007 20:25:44 +0000 (-0700)
Subject: ocfs2_dlm: Add missing locks in dlm_empty_lockres
X-Git-Tag: v2.6.21-rc4~6^2
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=b36c3f84988eebf38acaccc756e05f6b70e333ab;p=linux-2.6-omap-h63xx.git

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>
---

diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 77e4e6169a0..9229e04362f 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);