diff options
| -rw-r--r-- | net/mac80211/driver-ops.h | 14 | ||||
| -rw-r--r-- | net/mac80211/ieee80211_i.h | 3 | ||||
| -rw-r--r-- | net/mac80211/iface.c | 9 | ||||
| -rw-r--r-- | net/mac80211/main.c | 2 | ||||
| -rw-r--r-- | net/mac80211/rx.c | 9 |
5 files changed, 26 insertions, 11 deletions
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h index d231c93..020a94a 100644 --- a/net/mac80211/driver-ops.h +++ b/net/mac80211/driver-ops.h @@ -12,7 +12,11 @@ static inline int drv_tx(struct ieee80211_local *local, struct sk_buff *skb) static inline int drv_start(struct ieee80211_local *local) { - int ret = local->ops->start(&local->hw); + int ret; + + local->started = true; + smp_mb(); + ret = local->ops->start(&local->hw); trace_drv_start(local, ret); return ret; } @@ -21,6 +25,14 @@ static inline void drv_stop(struct ieee80211_local *local) { local->ops->stop(&local->hw); trace_drv_stop(local); + + /* sync away all work on the tasklet before clearing started */ + tasklet_disable(&local->tasklet); + tasklet_enable(&local->tasklet); + + barrier(); + + local->started = false; } static inline int drv_add_interface(struct ieee80211_local *local, diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index fa930e0..dbd8411 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -667,6 +667,9 @@ struct ieee80211_local { */ bool quiescing; + /* device is started */ + bool started; + int tx_headroom; /* required headroom for hardware/radiotap */ /* Tasklet and skb queue to process calls from IRQ mode. All frames diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 5940e69..d134bd7 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -277,11 +277,6 @@ static int ieee80211_open(struct net_device *dev) } } - if (local->open_count == 0) { - tasklet_enable(&local->tx_pending_tasklet); - tasklet_enable(&local->tasklet); - } - /* * set_multicast_list will be invoked by the networking core * which will check whether any increments here were done in @@ -552,11 +547,9 @@ static int ieee80211_stop(struct net_device *dev) ieee80211_recalc_ps(local, -1); if (local->open_count == 0) { + ieee80211_clear_tx_pending(local); ieee80211_stop_device(local); - tasklet_disable(&local->tx_pending_tasklet); - tasklet_disable(&local->tasklet); - /* no reconfiguring after stop! */ hw_reconf_flags = 0; } diff --git a/net/mac80211/main.c b/net/mac80211/main.c index dd3b081..797f539 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -715,12 +715,10 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, skb_queue_head_init(&local->pending[i]); tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, (unsigned long)local); - tasklet_disable(&local->tx_pending_tasklet); tasklet_init(&local->tasklet, ieee80211_tasklet_handler, (unsigned long) local); - tasklet_disable(&local->tasklet); skb_queue_head_init(&local->skb_queue); skb_queue_head_init(&local->skb_queue_unreliable); diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index dff2239..b98f1af 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2471,6 +2471,15 @@ void ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb) return; } + /* + * The same happens when we're not even started, + * but that's worth a warning. + */ + if (WARN_ON(!local->started)) { + kfree_skb(skb); + return; + } + if (status->flag & RX_FLAG_HT) { /* rate_idx is MCS index */ if (WARN_ON(status->rate_idx < 0 || |