sunrpc: fixed rollback in rpc_gssd_dummy_populate()

__rpc_depopulate(gssd_dentry) was lost on error path

cc: [email protected]
Fixes: commit 4b9a445 ("sunrpc: create a new dummy pipe for gssd to hold open")
Signed-off-by: Vasily Averin <[email protected]>
Reviewed-by: Jeff Layton <[email protected]>
Signed-off-by: Anna Schumaker <[email protected]>

Author: vaverin

net/sunrpc/rpc_pipe.c

@@ -1317,6 +1317,7 @@ rpc_gssd_dummy_populate(struct dentry *root, struct rpc_pipe *pipe_data)
 	q.len = strlen(gssd_dummy_clnt_dir[0].name);
 	clnt_dentry = d_hash_and_lookup(gssd_dentry, &q);
 	if (!clnt_dentry) {
+		__rpc_depopulate(gssd_dentry, gssd_dummy_clnt_dir, 0, 1);
 		pipe_dentry = ERR_PTR(-ENOENT);
 		goto out;
 	}