9P/RDMA: count posted buffers without a pending request

In rdma_request():

If an error occurs between posting the recv and the send,
there will be a reply context posted without a pending
request.
Since there is no way to "un-post" it, we remember it and
skip post_recv() for the next request.

Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/net/9p/client.c b/net/9p/client.c
index db5bf24..d18a0b2 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -656,8 +656,10 @@
 		return PTR_ERR(req);
 
 
-	/* if we haven't received a response for oldreq,
-	   remove it from the list. */
+	/*
+	 * if we haven't received a response for oldreq,
+	 * remove it from the list.
+	 */
 	spin_lock(&c->lock);
 	if (oldreq->status == REQ_STATUS_FLSH)
 		list_del(&oldreq->req_list);