From c9e15f25f514a76d906be01e621f400cdee94558 Mon Sep 17 00:00:00 2001
From: Greg KH <gregkh@linuxfoundation.org>
Date: Mon, 30 Mar 2015 14:59:15 +0200
Subject: [PATCH] debugfs: allow bad parent pointers to be passed in

If something went wrong with creating a debugfs file/symlink/directory,
that value could be passed down into debugfs again as a parent dentry.
To make caller code simpler, just error out if this happens, and don't
crash the kernel.

Reported-by: Alex Elder <elder@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Alex Elder <elder@linaro.org>
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Reading git-format-patch failed