diff options
| -rw-r--r-- | net/mac80211/pm.c | 24 | ||||
| -rw-r--r-- | net/mac80211/rx.c | 12 |
2 files changed, 27 insertions, 9 deletions
diff --git a/net/mac80211/pm.c b/net/mac80211/pm.c index 7a549f9deb9..5e3d476972f 100644 --- a/net/mac80211/pm.c +++ b/net/mac80211/pm.c @@ -55,15 +55,6 @@ int __ieee80211_suspend(struct ieee80211_hw *hw) rcu_read_unlock(); - /* flush again, in case driver queued work */ - flush_workqueue(local->hw.workqueue); - - /* stop hardware - this must stop RX */ - if (local->open_count) { - ieee80211_led_radio(local, false); - drv_stop(local); - } - /* remove STAs */ spin_lock_irqsave(&local->sta_lock, flags); list_for_each_entry(sta, &local->sta_list, list) { @@ -111,7 +102,22 @@ int __ieee80211_suspend(struct ieee80211_hw *hw) drv_remove_interface(local, &conf); } + /* stop hardware - this must stop RX */ + if (local->open_count) { + ieee80211_led_radio(local, false); + drv_stop(local); + } + + /* + * flush again, in case driver queued work -- it + * shouldn't be doing (or cancel everything in the + * stop callback) that but better safe than sorry. + */ + flush_workqueue(local->hw.workqueue); + local->suspended = true; + /* need suspended to be visible before quiescing is false */ + barrier(); local->quiescing = false; return 0; diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index de5bba7f910..0936fc24942 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -2453,6 +2453,18 @@ void __ieee80211_rx(struct ieee80211_hw *hw, struct sk_buff *skb, return; } + /* + * If we're suspending, it is possible although not too likely + * that we'd be receiving frames after having already partially + * quiesced the stack. We can't process such frames then since + * that might, for example, cause stations to be added or other + * driver callbacks be invoked. + */ + if (unlikely(local->quiescing || local->suspended)) { + kfree_skb(skb); + return; + } + if (status->flag & RX_FLAG_HT) { /* rate_idx is MCS index */ if (WARN_ON(status->rate_idx < 0 || |