From da009f39f85a3ee9deeb10f0f05ddd4efdd67020 Mon Sep 17 00:00:00 2001
From: Ben Dooks <ben@fluff.org>
Date: Tue, 4 Mar 2008 15:09:06 -0800
Subject: [PATCH] sysdev: detect multiple driver registrations

I've just found how easy it is to accidentally register a sysdev_driver for
two different classes.  When this happens, bad things happen as the
sysdev_driver structure keeps has the list entry for the driver
registration.

The following patch makes a WARN_ON() if this happens, although I think
BUG_ON or returning -EAGAIN could also be valid responses to this.

Signed-off-by: Ben Dooks <ben@fluff.org>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
Reading git-format-patch failed