drbd: Do not segfault if a sync dependency reaches a diskless device

[deliverable/linux.git] / drivers / block / drbd / drbd_worker.c

diff --git a/drivers/block/drbd/drbd_worker.c b/drivers/block/drbd/drbd_worker.c
index cbbc5c7cbef4fca3035e02ad6d78d7f3f36cd079..c3d1f5f5853a8bb41fd869e21e03d97bb20c9ca2 100644 (file)
--- a/drivers/block/drbd/drbd_worker.c
+++ b/drivers/block/drbd/drbd_worker.c
@@ -1319,6 +1319,8 @@ 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);