From: Ben Dooks <ben@fluff.org>
Date: Tue, 4 Mar 2008 23:09:06 +0000 (-0800)
Subject: sysdev: detect multiple driver registrations
X-Git-Tag: v2.6.26-rc1~1126^2~19
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=da009f39f85a3ee9deeb10f0f05ddd4efdd67020;p=pandora-kernel.git

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>
---

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