[NET_SCHED]: Reread dev->qdisc for NETDEV_TX_OK

Now that we return the queue length after NETDEV_TX_OK we better
make sure that we have the right queue.  Otherwise we can cause a
stall after a really quick dev_deactive/dev_activate.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 07200bfebf00650a88ff7b84dbd9faf732263abb..816d311db40fbb5531efbf529ddf2d1421490997 100644 (file)
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -132,6 +132,7 @@ static inline int qdisc_restart(struct net_device *dev)
                                                netif_tx_unlock(dev);
                                        }
                                        spin_lock(&dev->queue_lock);
+                                       q = dev->qdisc;
                                        goto out;
                                }
                                if (ret == NETDEV_TX_LOCKED && nolock) {