[BRIDGE] br_if: Fix oops in port_carrier_check

Signed-off-by: Jarek Poplawski <jarkao2@o2.pl>
Acked-by: Stephen Hemminger <shemminger@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 1 deletions

diff --git a/net/bridge/br_notify.c b/net/bridge/br_notify.c
index 8cd3e4229070..3311c4e30829 100644
--- a/net/bridge/br_notify.c
+++ b/net/bridge/br_notify.c
@@ -56,7 +56,9 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
 
         case NETDEV_CHANGE:
                 if (br->dev->flags & IFF_UP)
-                        schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);
+                        if (schedule_delayed_work(&p->carrier_check,
+                                                BR_PORT_DEBOUNCE))
+                                dev_hold(dev);
                 break;
 
         case NETDEV_FEAT_CHANGE: