dm ioctl: allow dm_copy_name_and_uuid to return only one field

[safe/jmp/linux-2.6] / drivers / md / dm-ioctl.c

diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c
index 777c948..8da7a01 100644 (file)
--- a/drivers/md/dm-ioctl.c
+++ b/drivers/md/dm-ioctl.c
@@ -1550,8 +1550,10 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid)
                goto out;
        }
 
-       strcpy(name, hc->name);
-       strcpy(uuid, hc->uuid ? : "");
+       if (name)
+               strcpy(name, hc->name);
+       if (uuid)
+               strcpy(uuid, hc->uuid ? : "");
 
 out:
        up_read(&_hash_lock);