From: Philipp Reisner <philipp.reisner@linbit.com>
Date: Tue, 21 Aug 2012 18:34:07 +0000 (+0200)
Subject: drbd: Fix a race condition that can lead to a BUG()
X-Git-Tag: v3.8-rc1~78^2~18^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c1fd29a11f433ca8ae37723768016ffe6cdd487b;p=pandora-kernel.git

drbd: Fix a race condition that can lead to a BUG()

If the preconditions for a state change change after the wait_event() we
might hit the BUG() statement in conn_set_state().

With holding the spin_lock while evaluating the condition AND until the
actual state change we ensure the the preconditions can not change anymore.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---

Reading git-diff-tree failed