From: Jean Delvare <khali@linux-fr.org>
Date: Mon, 10 Sep 2012 08:14:02 +0000 (+0200)
Subject: i2c-core: Fix for lockdep validator
X-Git-Tag: v3.6-rc6~38^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=390946b17260797635cd9e65496b5a17b2db0a5d;p=pandora-kernel.git

i2c-core: Fix for lockdep validator

If kernel is compiled with CONFIG_PROVE_LOCKING the
validator raises an error when a multiplexer is removed
via sysfs and sub-clients are connected to it. This is a
false positive.
Documentation/lockdep-design.txt recommends to handle this
via calls to mutex_lock_nested().

Based on an earlier fix from Michael Lawnick.

Note that the extra code resolves to nothing unless
CONFIG_DEBUG_LOCK_ALLOC=y.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Michael Lawnick <ml.lawnick@gmx.de>
---

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