From c142492e915f8186db6edafbd74a5ba1d37e7553 Mon Sep 17 00:00:00 2001
From: steve <steve>
Date: Wed, 17 Oct 2001 15:03:00 +0000
Subject: [PATCH]  o Fix crash that Patrick reported

---
 driver/device-mapper/dm.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/driver/device-mapper/dm.c b/driver/device-mapper/dm.c
index abd58aaf9..900a413e3 100644
--- a/driver/device-mapper/dm.c
+++ b/driver/device-mapper/dm.c
@@ -878,8 +878,9 @@ int dm_deactivate(struct mapped_device *md)
 		return -EPERM;
 	}
 
-	close_devices(&md->map->devices);
-	md->map = 0;
+	if (md->map)
+		close_devices(&md->map->devices);
+	md->map = NULL;
 	clear_bit(DM_ACTIVE, &md->state);
 	wu;