ocfs2/dlm: fix deadlock when dispatch assert master

[pandora-kernel.git] / fs / ocfs2 / dlm / dlmrecovery.c

diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index d15b071..0e5013e 100644 (file)
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1689,6 +1689,7 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
        unsigned int hash;
        int master = DLM_LOCK_RES_OWNER_UNKNOWN;
        u32 flags = DLM_ASSERT_MASTER_REQUERY;
+       int dispatched = 0;
 
        if (!dlm_grab(dlm)) {
                /* since the domain has gone away on this
@@ -1710,6 +1711,8 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
                                mlog_errno(-ENOMEM);
                                /* retry!? */
                                BUG();
+                       } else {
+                               dispatched = 1;
                        }
                } else /* put.. incase we are not the master */
                        dlm_lockres_put(res);
@@ -1717,7 +1720,8 @@ int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
        }
        spin_unlock(&dlm->spinlock);
 
-       dlm_put(dlm);
+       if (!dispatched)
+               dlm_put(dlm);
        return master;
 }