netdev-vport: Make netdev_vport_patch_peer() return a malloc()'d string.

When threading comes into the picture there arises the possibility of a
race between netdev_vport_patch_peer()'s caller using the returned string
and another caller changing the peer.  It is safer to return a copy.

Signed-off-by: Ben Pfaff <blp@nicira.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/netdev-vport.h b/lib/netdev-vport.h
index 53949666e..dc490970c 100644
--- a/lib/netdev-vport.h
+++ b/lib/netdev-vport.h
@@ -31,7 +31,7 @@ void netdev_vport_patch_register(void);
 
 bool netdev_vport_is_patch(const struct netdev *);
 
-const char *netdev_vport_patch_peer(const struct netdev *netdev);
+char *netdev_vport_patch_peer(const struct netdev *netdev);
 
 void netdev_vport_inc_rx(const struct netdev *,
                          const struct dpif_flow_stats *);