RPC: clarify rpc_run_task error handling

rpc_run_task can only fail if it is not passed in a preallocated task.
However, that is not at all clear with the current code.  So
remove several impossible to occur failure checks.
Signed-off-by: Fred Isaman <iisaman@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/clnt.c

@@ -636,12 +636,6 @@ struct rpc_task *rpc_run_task(const struct rpc_task_setup *task_setup_data)
 	rpc_task_set_client(task, task_setup_data->rpc_client);
 	rpc_task_set_rpc_message(task, task_setup_data->rpc_message);
 
-	if (task->tk_status != 0) {
-		int ret = task->tk_status;
-		rpc_put_task(task);
-		return ERR_PTR(ret);
-	}
-
 	if (task->tk_action == NULL)
 		rpc_call_start(task);
 

net/sunrpc/sched.c

@@ -836,12 +836,6 @@ struct rpc_task *rpc_new_task(const struct rpc_task_setup *setup_data)
 	}
 
 	rpc_init_task(task, setup_data);
-	if (task->tk_status < 0) {
-		int err = task->tk_status;
-		rpc_put_task(task);
-		return ERR_PTR(err);
-	}
-
 	task->tk_flags |= flags;
 	dprintk("RPC:       allocated task %p\n", task);
 	return task;