9P: Add cancelled() to the transport functions.

RDMA needs to post a buffer for each incoming reply.
Hence it needs to keep count of these and needs to be
aware of whether a flushed request has received a reply
or not.

This patch adds the cancelled() callback to the transport modules.
It is called when RFLUSH has been received and that the corresponding
request will never receive a reply.

Signed-off-by: Simon Derr <simon.derr@bull.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/net/9p/client.c b/net/9p/client.c
index d18a0b22f62c..8b93cae2d11d 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -658,12 +658,18 @@ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
 
 	/*
 	 * if we haven't received a response for oldreq,
-	 * remove it from the list.
+	 * remove it from the list, and notify the transport
+	 * layer that the reply will never arrive.
 	 */
 	spin_lock(&c->lock);
-	if (oldreq->status == REQ_STATUS_FLSH)
+	if (oldreq->status == REQ_STATUS_FLSH) {
 		list_del(&oldreq->req_list);
-	spin_unlock(&c->lock);
+		spin_unlock(&c->lock);
+		if (c->trans_mod->cancelled)
+			c->trans_mod->cancelled(c, req);
+	} else {
+		spin_unlock(&c->lock);
+	}
 
 	p9_free_req(c, req);
 	return 0;