diff --git a/drivers/md/dm-log.c b/drivers/md/dm-log.c
index a60acf8d385a..a66428d860fe 100644
--- a/drivers/md/dm-log.c
+++ b/drivers/md/dm-log.c
@@ -478,7 +478,14 @@ static int disk_resume(struct dirty_log *log)
 		DMWARN("%s: Failed to read header on mirror log device",
 		       lc->log_dev->name);
 		fail_log_device(lc);
-		return r;
+		/*
+		 * If the log device cannot be read, we must assume
+		 * all regions are out-of-sync.  If we simply return
+		 * here, the state will be uninitialized and could
+		 * lead us to return 'in-sync' status for regions
+		 * that are actually 'out-of-sync'.
+		 */
+		lc->header.nr_regions = 0;
 	}
 
 	/* set or clear any new bits -- device has grown */