NFSv4: nfs4_locku_done must release the sequence id

commit 2b1bc308f492589f7d49012ed24561534ea2be8c upstream.

If the state recovery machinery is triggered by the call to
nfs4_async_handle_error() then we can deadlock.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b106b9729bcf909346b0b629ce034a517e97f403..3b005ebb46855d0d2ea529ce01781098d87830ad 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4306,6 +4306,7 @@ static void nfs4_locku_done(struct rpc_task *task, void *data)
                        if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
                                rpc_restart_call_prepare(task);
        }
+       nfs_release_seqid(calldata->arg.seqid);
 }
 
 static void nfs4_locku_prepare(struct rpc_task *task, void *data)