--- a/mercurial/sshserver.py	Mon Nov 28 01:18:15 2011 +0100
+++ b/mercurial/sshserver.py	Mon Nov 28 01:32:13 2011 +0100
@@ -142,8 +142,8 @@
 
         self.sendresponse("")
         cg = changegroup.unbundle10(self.fin, "UN")
-        r = self.repo.addchangegroup(cg, 'serve', self._client(),
-                                     lock=self.lock)
+        r = self.repo.addchangegroup(cg, 'serve', self._client())
+        self.lock.release()
         return str(r)
 
     def _client(self):