3 files changed, 23 insertions, 6 deletions

diff --git a/include/net/9p/transport.h b/include/net/9p/transport.h
index 9a36d9297114..d9fa68f26c41 100644
--- a/include/net/9p/transport.h
+++ b/include/net/9p/transport.h
@@ -40,6 +40,8 @@
  * @close: member function to discard a connection on this transport
  * @request: member function to issue a request to the transport
  * @cancel: member function to cancel a request (if it hasn't been sent)
+ * @cancelled: member function to notify that a cancelled request will not
+ *             not receive a reply
  *
  * This is the basic API for a transport module which is registered by the
  * transport module with the 9P core network module and used by the client
@@ -58,6 +60,7 @@ struct p9_trans_module {
         void (*close) (struct p9_client *);
         int (*request) (struct p9_client *, struct p9_req_t *req);
         int (*cancel) (struct p9_client *, struct p9_req_t *req);
+        int (*cancelled)(struct p9_client *, struct p9_req_t *req);
         int (*zc_request)(struct p9_client *, struct p9_req_t *,
                           char *, char *, int , int, int, int);
 };
diff --git a/net/9p/client.c b/net/9p/client.c
index ce26da95f63f..40e558172bbe 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -663,16 +663,13 @@ static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq)
         if (IS_ERR(req))
                 return PTR_ERR(req);
 
-
         /*
          * if we haven't received a response for oldreq,
          * remove it from the list
          */
-        if (oldreq->status == REQ_STATUS_FLSH) {
-                spin_lock(&c->lock);
-                list_del(&oldreq->req_list);
-                spin_unlock(&c->lock);
-        }
+        if (oldreq->status == REQ_STATUS_FLSH)
+                if (c->trans_mod->cancelled)
+                        c->trans_mod->cancelled(c, oldreq);
 
         p9_free_req(c, req);
         return 0;
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 193efd562466..fda4951c869e 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -709,6 +709,20 @@ static int p9_fd_cancel(struct p9_client *client, struct p9_req_t *req)
         return ret;
 }
 
+static int p9_fd_cancelled(struct p9_client *client, struct p9_req_t *req)
+{
+        p9_debug(P9_DEBUG_TRANS, "client %p req %p\n", client, req);
+
+        /* we haven't received a response for oldreq,
+         * remove it from the list.
+         */
+        spin_lock(&client->lock);
+        list_del(&req->req_list);
+        spin_unlock(&client->lock);
+
+        return 0;
+}
+
 /**
  * parse_opts - parse mount options into p9_fd_opts structure
  * @params: options string passed from mount
@@ -1050,6 +1064,7 @@ static struct p9_trans_module p9_tcp_trans = {
         .close = p9_fd_close,
         .request = p9_fd_request,
         .cancel = p9_fd_cancel,
+        .cancelled = p9_fd_cancelled,
         .owner = THIS_MODULE,
 };
 
@@ -1061,6 +1076,7 @@ static struct p9_trans_module p9_unix_trans = {
         .close = p9_fd_close,
         .request = p9_fd_request,
         .cancel = p9_fd_cancel,
+        .cancelled = p9_fd_cancelled,
         .owner = THIS_MODULE,
 };
 
@@ -1072,6 +1088,7 @@ static struct p9_trans_module p9_fd_trans = {
         .close = p9_fd_close,
         .request = p9_fd_request,
         .cancel = p9_fd_cancel,
+        .cancelled = p9_fd_cancelled,
         .owner = THIS_MODULE,
 };