SUNRPC: remove RPC client pipefs dentries after unregister

Without this patch we have races:

rpc_fill_super				rpc_free_client
rpc_pipefs_event(MOUNT)			rpc_remove_pipedir
spin_lock(&rpc_client_lock);
rpc_setup_pipedir_sb
spin_unlock(&rpc_client_lock);
					spin_lock(&rpc_client_lock);
					(remove from list)
					spin_unlock(&rpc_client_lock);
					MEAMORY LEAKED

Signed-off-by: Stanislav Kinsbursky <skinsbursky@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 417074500592..c89ceb80fe87 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -578,7 +578,6 @@ rpc_free_client(struct rpc_clnt *clnt)
 {
         dprintk("RPC:       destroying %s client for %s\n",
                         clnt->cl_protname, clnt->cl_server);
-        rpc_clnt_remove_pipedir(clnt);
         if (clnt->cl_parent != clnt) {
                 rpc_release_client(clnt->cl_parent);
                 goto out_free;
@@ -587,6 +586,7 @@ rpc_free_client(struct rpc_clnt *clnt)
                 kfree(clnt->cl_server);
 out_free:
         rpc_unregister_client(clnt);
+        rpc_clnt_remove_pipedir(clnt);
         rpc_free_iostats(clnt->cl_metrics);
         kfree(clnt->cl_principal);
         clnt->cl_metrics = NULL;