From d0f80f9aadf60adc4caafed0d2b01e79a315ff80 Mon Sep 17 00:00:00 2001
From: Bjorn Helgaas <bhelgaas@google.com>
Date: Thu, 5 Dec 2013 16:46:35 -0700
Subject: [PATCH] firmware: dmi-sysfs: Remove "dmi" directory on module exit

With CONFIG_DEBUG_KOBJECT_RELEASE=y, removing and immediately reloading the
dmi-sysfs module causes the following warning:

  sysfs: cannot create duplicate filename '/firmware/dmi'
  kobject_add_internal failed for dmi with -EEXIST, don't try to register things with the same name in the same directory.

The "dmi" directory stays in sysfs until the dmi_kobj is released, and
DEBUG_KOBJECT_RELEASE delays that.

I don't think we can hit this problem in normal usage because dmi_kobj is
static and nothing outside dmi-sysfs can get a reference to it, so the
only way to delay the "dmi" release is with DEBUG_KOBJECT_RELEASE.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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