hi, should these code is a problem in nfs system clnt.c?

[linuxer linuxer]

Hi, everyone: 
    I am a newbie, if my question waste your time, I
am sorry for that. 

    In clnt.c file ,call_timeout function:    
    I suggest the code that judge whether the network
link status is down should be added, won't they? 
    I tested it with one Ethernet netcard.

static void
call_timeout(struct rpc_task *task)
{
	struct rpc_clnt	*clnt = task->tk_client;

+       struct netdev * dev;
+       if ((dev = __dev_get_by_name("eth0")) == 
+        NULL){
+		rpc_exit(task, -ENOTCONN);
+		return;
+    	}
+	else{
+   		 if (!netif_carrier_ok(dev)){
+  			rpc_exit(task, -ENOTCONN);
+			return;
+  		 }
+     	}

	if (xprt_adjust_timeout(task->tk_rqstp) == 0) {
		dprintk("RPC: %4d call_timeout (minor)\n",
task->tk_pid);
		goto retry;
	}

	dprintk("RPC: %4d call_timeout (major)\n",
task->tk_pid);
	task->tk_timeouts++;

	if (RPC_IS_SOFT(task)) {
		printk(KERN_NOTICE "%s: server %s not responding,
timed out\n",
				clnt->cl_protname, clnt->cl_server);
		rpc_exit(task, -EIO);
		return;
	}

	if (!(task->tk_flags & RPC_CALL_MAJORSEEN)) {
		task->tk_flags |= RPC_CALL_MAJORSEEN;
		printk(KERN_NOTICE "%s: server %s not responding,
still trying\n",
			clnt->cl_protname, clnt->cl_server);
	}
	rpc_force_rebind(clnt);

retry:
	clnt->cl_stats->rpcretrans++;
	task->tk_action = call_bind;
	task->tk_status = 0;
}



 
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