SUNRPC: skip clients with program without PipeFS entries
1) This is sane. 2) Otherwise there will be soft lockup: do { rpc_get_client_for_event (clnt->cl_dentry == NULL ==> choose) __rpc_pipefs_event (clnt->cl_program->pipe_dir_name == NULL ==> return) } while (1) Signed-off-by: NStanislav Kinsbursky <skinsbursky@parallels.com> Signed-off-by: NTrond Myklebust <Trond.Myklebust@netapp.com>
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