NFS client bugfixes for Linux 5.1

Highlights include:
 
 Bugfixes:
 - Fix a regression in which an RPC call can be tagged with an error despite
   the transmission being successful
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Merge tag 'nfs-for-5.1-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfix from Trond Myklebust:
 "Fix a regression in which an RPC call can be tagged with an error
  despite the transmission being successful"

* tag 'nfs-for-5.1-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  SUNRPC: Ignore queue transmission errors on successful transmission

net/sunrpc/clnt.c

@@ -2081,8 +2081,8 @@ call_transmit_status(struct rpc_task *task)
 	 * test first.
 	 */
 	if (rpc_task_transmitted(task)) {
-		if (task->tk_status == 0)
-			xprt_request_wait_receive(task);
+		task->tk_status = 0;
+		xprt_request_wait_receive(task);
 		return;
 	}
 
@@ -2167,6 +2167,9 @@ call_bc_transmit_status(struct rpc_task *task)
 {
 	struct rpc_rqst *req = task->tk_rqstp;
 
+	if (rpc_task_transmitted(task))
+		task->tk_status = 0;
+
 	dprint_status(task);
 
 	switch (task->tk_status) {