rpc_pipe: remove the clntXX dir if creating the pipe fails

In the event that we create the gssd/clntXX dir, but the pipe creation
subsequently fails, then we should remove the clntXX dir before
returning.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

net/sunrpc/rpc_pipe.c

@@ -1313,6 +1313,8 @@ rpc_gssd_dummy_populate(struct dentry *root, struct rpc_pipe *pipe_data)
 	}
 
 	pipe_dentry = rpc_mkpipe_dentry(clnt_dentry, "gssd", NULL, pipe_data);
+	if (IS_ERR(pipe_dentry))
+		__rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1);
 out:
 	dput(clnt_dentry);
 	dput(gssd_dentry);