From: Lars Ellenberg <lars.ellenberg@linbit.com>
Date: Tue, 24 Jul 2012 08:13:55 +0000 (+0200)
Subject: drbd: take error path in drbd_adm_down if interrupted by signal
X-Git-Tag: v3.8-rc1~78^2~18^2~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27012382bc221a8cf6ca67ced19df699b0ba8e78;p=pandora-kernel.git

drbd: take error path in drbd_adm_down if interrupted by signal

drbd_adm_down() does adm_detach(), which can fail with various error
codes, or be interrupted by a signal.

The interrupted by signal case was not properly handled,
leading to
	block drbd0: ASSERT( mdev->state.disk == D_DISKLESS &&
	                     mdev->state.conn == C_STANDALONE ) in drbd/drbd_worker.c
and further to destroying objects while still in use, and resulting crashes.

Detect the interruption, and take the error path out.

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