diff options
Diffstat (limited to 'net/mac80211/iface.c')
| -rw-r--r-- | net/mac80211/iface.c | 82 |
1 files changed, 56 insertions, 26 deletions
diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c index 640afab304d..9cbebc2eb87 100644 --- a/net/mac80211/iface.c +++ b/net/mac80211/iface.c @@ -78,7 +78,7 @@ void ieee80211_recalc_txpower(struct ieee80211_sub_if_data *sdata) ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_TXPOWER); } -static u32 ieee80211_idle_off(struct ieee80211_local *local) +static u32 __ieee80211_idle_off(struct ieee80211_local *local) { if (!(local->hw.conf.flags & IEEE80211_CONF_IDLE)) return 0; @@ -87,7 +87,7 @@ static u32 ieee80211_idle_off(struct ieee80211_local *local) return IEEE80211_CONF_CHANGE_IDLE; } -static u32 ieee80211_idle_on(struct ieee80211_local *local) +static u32 __ieee80211_idle_on(struct ieee80211_local *local) { if (local->hw.conf.flags & IEEE80211_CONF_IDLE) return 0; @@ -98,16 +98,18 @@ static u32 ieee80211_idle_on(struct ieee80211_local *local) return IEEE80211_CONF_CHANGE_IDLE; } -void ieee80211_recalc_idle(struct ieee80211_local *local) +static u32 __ieee80211_recalc_idle(struct ieee80211_local *local, + bool force_active) { bool working = false, scanning, active; unsigned int led_trig_start = 0, led_trig_stop = 0; struct ieee80211_roc_work *roc; - u32 change; lockdep_assert_held(&local->mtx); - active = !list_empty(&local->chanctx_list) || local->monitors; + active = force_active || + !list_empty(&local->chanctx_list) || + local->monitors; if (!local->ops->remain_on_channel) { list_for_each_entry(roc, &local->roc_list, list) { @@ -132,9 +134,18 @@ void ieee80211_recalc_idle(struct ieee80211_local *local) ieee80211_mod_tpt_led_trig(local, led_trig_start, led_trig_stop); if (working || scanning || active) - change = ieee80211_idle_off(local); - else - change = ieee80211_idle_on(local); + return __ieee80211_idle_off(local); + return __ieee80211_idle_on(local); +} + +u32 ieee80211_idle_off(struct ieee80211_local *local) +{ + return __ieee80211_recalc_idle(local, true); +} + +void ieee80211_recalc_idle(struct ieee80211_local *local) +{ + u32 change = __ieee80211_recalc_idle(local, false); if (change) ieee80211_hw_config(local, change); } @@ -349,21 +360,19 @@ static void ieee80211_set_default_queues(struct ieee80211_sub_if_data *sdata) static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) { struct ieee80211_sub_if_data *sdata; - int ret = 0; + int ret; if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) return 0; - mutex_lock(&local->iflist_mtx); + ASSERT_RTNL(); if (local->monitor_sdata) - goto out_unlock; + return 0; sdata = kzalloc(sizeof(*sdata) + local->hw.vif_data_size, GFP_KERNEL); - if (!sdata) { - ret = -ENOMEM; - goto out_unlock; - } + if (!sdata) + return -ENOMEM; /* set up data */ sdata->local = local; @@ -377,13 +386,13 @@ static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) if (WARN_ON(ret)) { /* ok .. stupid driver, it asked for this! */ kfree(sdata); - goto out_unlock; + return ret; } ret = ieee80211_check_queues(sdata); if (ret) { kfree(sdata); - goto out_unlock; + return ret; } ret = ieee80211_vif_use_channel(sdata, &local->monitor_chandef, @@ -391,13 +400,14 @@ static int ieee80211_add_virtual_monitor(struct ieee80211_local *local) if (ret) { drv_remove_interface(local, sdata); kfree(sdata); - goto out_unlock; + return ret; } + mutex_lock(&local->iflist_mtx); rcu_assign_pointer(local->monitor_sdata, sdata); - out_unlock: mutex_unlock(&local->iflist_mtx); - return ret; + + return 0; } static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) @@ -407,14 +417,20 @@ static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) if (!(local->hw.flags & IEEE80211_HW_WANT_MONITOR_VIF)) return; + ASSERT_RTNL(); + mutex_lock(&local->iflist_mtx); sdata = rcu_dereference_protected(local->monitor_sdata, lockdep_is_held(&local->iflist_mtx)); - if (!sdata) - goto out_unlock; + if (!sdata) { + mutex_unlock(&local->iflist_mtx); + return; + } rcu_assign_pointer(local->monitor_sdata, NULL); + mutex_unlock(&local->iflist_mtx); + synchronize_net(); ieee80211_vif_release_channel(sdata); @@ -422,8 +438,6 @@ static void ieee80211_del_virtual_monitor(struct ieee80211_local *local) drv_remove_interface(local, sdata); kfree(sdata); - out_unlock: - mutex_unlock(&local->iflist_mtx); } /* @@ -541,6 +555,9 @@ int ieee80211_do_open(struct wireless_dev *wdev, bool coming_up) ieee80211_adjust_monitor_flags(sdata, 1); ieee80211_configure_filter(local); + mutex_lock(&local->mtx); + ieee80211_recalc_idle(local); + mutex_unlock(&local->mtx); netif_carrier_on(dev); break; @@ -812,6 +829,9 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, ieee80211_adjust_monitor_flags(sdata, -1); ieee80211_configure_filter(local); + mutex_lock(&local->mtx); + ieee80211_recalc_idle(local); + mutex_unlock(&local->mtx); break; case NL80211_IFTYPE_P2P_DEVICE: /* relies on synchronize_rcu() below */ @@ -824,11 +844,12 @@ static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, * * sta_info_flush_cleanup() requires rcu_barrier() * first to wait for the station call_rcu() calls - * to complete, here we need at least sychronize_rcu() - * it to wait for the RX path in case it is using the + * to complete, and we also need synchronize_rcu() + * to wait for the RX path in case it is using the * interface and enqueuing frames at this very time on * another CPU. */ + synchronize_rcu(); rcu_barrier(); sta_info_flush_cleanup(sdata); @@ -1628,6 +1649,15 @@ void ieee80211_remove_interfaces(struct ieee80211_local *local) ASSERT_RTNL(); + /* + * Close all AP_VLAN interfaces first, as otherwise they + * might be closed while the AP interface they belong to + * is closed, causing unregister_netdevice_many() to crash. + */ + list_for_each_entry(sdata, &local->interfaces, list) + if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) + dev_close(sdata->dev); + mutex_lock(&local->iflist_mtx); list_for_each_entry_safe(sdata, tmp, &local->interfaces, list) { list_del(&sdata->list); |