net: Do not fire linkwatch events until the device is registered.

Several device drivers try to do things like netif_carrier_off()
before register_netdev() is invoked.  This is bogus, but too many
drivers do this to fix them all up in one go.

Reported-by: Folkert van Heusden <folkert@vanheusden.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 93cd30ce65011d2b84541277c15664ed6287fc3d..cdcd16fcfeda463c0e9057d288f1b0910070648b 100644 (file)
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -270,6 +270,8 @@ static void dev_watchdog_down(struct net_device *dev)
 void netif_carrier_on(struct net_device *dev)
 {
        if (test_and_clear_bit(__LINK_STATE_NOCARRIER, &dev->state)) {
+               if (dev->reg_state == NETREG_UNINITIALIZED)
+                       return;
                linkwatch_fire_event(dev);
                if (netif_running(dev))
                        __netdev_watchdog_up(dev);
@@ -285,8 +287,11 @@ EXPORT_SYMBOL(netif_carrier_on);
  */
 void netif_carrier_off(struct net_device *dev)
 {
-       if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state))
+       if (!test_and_set_bit(__LINK_STATE_NOCARRIER, &dev->state)) {
+               if (dev->reg_state == NETREG_UNINITIALIZED)
+                       return;
                linkwatch_fire_event(dev);
+       }
 }
 EXPORT_SYMBOL(netif_carrier_off);