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>

diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
index e85ac77..d9ed5f2 100644 (file)
--- 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);
 }
 
 /*