commit 27012382bc221a8cf6ca67ced19df699b0ba8e78
author Lars Ellenberg <lars.ellenberg@linbit.com> Tue Jul 24 10:13:55 2012 +0200
committer Philipp Reisner <philipp.reisner@linbit.com> Thu Nov 08 16:58:37 2012 +0100
tree 06f9e5d186a4c236f79cdd7166819ea3cc0744f6
parent 9a278a7906066a1b4f37fff9b5e27a92af0ca3ce

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>