nfsd4: remove probe task's reference on client

Any null probe rpc will be synchronously destroyed by the
rpc_shutdown_client() in expire_client(), so the rpc task cannot outlast
the nfs4 client.  Therefore there's no need for that task to hold a
reference on the client.

Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index b99c3f0..91eb2ea 100644 (file)
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -509,7 +509,6 @@ static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
                warn_no_callback_path(clp, task->tk_status);
        else
                atomic_set(&clp->cl_cb_conn.cb_set, 1);
-       put_nfs4_client(clp);
 }
 
 static const struct rpc_call_ops nfsd4_cb_probe_ops = {
@@ -542,10 +541,8 @@ void do_probe_callback(struct nfs4_client *clp)
        status = rpc_call_async(cb->cb_client, &msg,
                                RPC_TASK_SOFT | RPC_TASK_SOFTCONN,
                                &nfsd4_cb_probe_ops, (void *)clp);
-       if (status) {
+       if (status)
                warn_no_callback_path(clp, status);
-               put_nfs4_client(clp);
-       }
 }
 
 /*
@@ -563,10 +560,6 @@ nfsd4_probe_callback(struct nfs4_client *clp)
                warn_no_callback_path(clp, status);
                return;
        }
-
-       /* the task holds a reference to the nfs4_client struct */
-       atomic_inc(&clp->cl_count);
-
        do_probe_callback(clp);
 }