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

From: Philipp Reisner
Date: Thu Sep 08 2011 - 08:49:37 EST


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