svcrdma: Fix error handling during listening endpoint creation

A listening endpoint isn't known to the generic transport switch until
the svc_create_xprt function returns without error. Calling
svc_xprt_put within the xpo_create function causes the module reference
count to be erroneously decremented.

Signed-off-by: Tom Tucker <tom@opengridcomputing.com>

1 files changed, 13 insertions, 11 deletions

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index e85ac77f4954..d9ed5f24c362 100644
--- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
+++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
@@ -667,31 +667,27 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
 
         cma_xprt = rdma_create_xprt(serv, 1);
         if (!cma_xprt)
-                return ERR_PTR(ENOMEM);
+                return ERR_PTR(-ENOMEM);
         xprt = &cma_xprt->sc_xprt;
 
         listen_id = rdma_create_id(rdma_listen_handler, cma_xprt, RDMA_PS_TCP);
         if (IS_ERR(listen_id)) {
-                svc_xprt_put(&cma_xprt->sc_xprt);
-                dprintk("svcrdma: rdma_create_id failed = %ld\n",
-                        PTR_ERR(listen_id));
-                return (void *)listen_id;
+                ret = PTR_ERR(listen_id);
+                dprintk("svcrdma: rdma_create_id failed = %d\n", ret);
+                goto err0;
         }
+
         ret = rdma_bind_addr(listen_id, sa);
         if (ret) {
-                rdma_destroy_id(listen_id);
-                svc_xprt_put(&cma_xprt->sc_xprt);
                 dprintk("svcrdma: rdma_bind_addr failed = %d\n", ret);
-                return ERR_PTR(ret);
+                goto err1;
         }
         cma_xprt->sc_cm_id = listen_id;
 
         ret = rdma_listen(listen_id, RPCRDMA_LISTEN_BACKLOG);
         if (ret) {
-                rdma_destroy_id(listen_id);
-                svc_xprt_put(&cma_xprt->sc_xprt);
                 dprintk("svcrdma: rdma_listen failed = %d\n", ret);
-                return ERR_PTR(ret);
+                goto err1;
         }
 
         /*
@@ -702,6 +698,12 @@ static struct svc_xprt *svc_rdma_create(struct svc_serv *serv,
         svc_xprt_set_local(&cma_xprt->sc_xprt, sa, salen);
 
         return &cma_xprt->sc_xprt;
+
+ err1:
+        rdma_destroy_id(listen_id);
+ err0:
+        kfree(cma_xprt);
+        return ERR_PTR(ret);
 }
 
 /*