diff options
Diffstat (limited to 'net/mac80211/ieee80211.c')
| -rw-r--r-- | net/mac80211/ieee80211.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/net/mac80211/ieee80211.c b/net/mac80211/ieee80211.c index 5fc240259f55..00df2a9a2661 100644 --- a/net/mac80211/ieee80211.c +++ b/net/mac80211/ieee80211.c @@ -493,7 +493,16 @@ static void ieee80211_if_shutdown(struct net_device *dev) case IEEE80211_IF_TYPE_IBSS: sdata->u.sta.state = IEEE80211_DISABLED; del_timer_sync(&sdata->u.sta.timer); + /* + * Holding the sub_if_lock for writing here blocks + * out the receive path and makes sure it's not + * currently processing a packet that may get + * added to the queue. + */ + write_lock_bh(&local->sub_if_lock); skb_queue_purge(&sdata->u.sta.skb_queue); + write_unlock_bh(&local->sub_if_lock); + if (!local->ops->hw_scan && local->scan_dev == sdata->dev) { local->sta_scanning = 0; |