linux-kernel - [PATCH 05/16] drbd: Do not segfault if a sync dependency reaches a diskless device

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Message-Id: <1315485937-18989-6-git-send-email-philipp.reisner@linbit.com>
Date:	Thu,  8 Sep 2011 14:45:26 +0200
From:	Philipp Reisner <philipp.reisner@...bit.com>
To:	linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>
Cc:	drbd-dev@...ts.linbit.com
Subject: [PATCH 05/16] drbd: Do not segfault if a sync dependency reaches a diskless device

Signed-off-by: Philipp Reisner <philipp.reisner@...bit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@...bit.com>
---
 drivers/block/drbd/drbd_worker.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index ed12cdf..829a2ce 100644
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1321,6 +1321,8 @@ static int _drbd_may_sync_now(struct drbd_conf *mdev)
 	struct drbd_conf *odev = mdev;
 
 	while (1) {
+		if (!odev->ldev)
+			return 1;
 		if (odev->ldev->dc.resync_after == -1)
 			return 1;
 		odev = minor_to_mdev(odev->ldev->dc.resync_after);
-- 
1.7.4.1

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