diff options
Diffstat (limited to 'net/mac80211/cfg.c')
| -rw-r--r-- | net/mac80211/cfg.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c index bfe54daab4b1..aab3c2f29de3 100644 --- a/net/mac80211/cfg.c +++ b/net/mac80211/cfg.c @@ -828,6 +828,7 @@ static int ieee80211_set_monitor_channel(struct wiphy *wiphy, if (cfg80211_chandef_identical(&local->monitor_chandef, chandef)) return 0; + mutex_lock(&local->mtx); mutex_lock(&local->iflist_mtx); if (local->use_chanctx) { sdata = rcu_dereference_protected( @@ -846,6 +847,7 @@ static int ieee80211_set_monitor_channel(struct wiphy *wiphy, if (ret == 0) local->monitor_chandef = *chandef; mutex_unlock(&local->iflist_mtx); + mutex_unlock(&local->mtx); return ret; } @@ -951,6 +953,7 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, struct cfg80211_ap_settings *params) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; struct beacon_data *old; struct ieee80211_sub_if_data *vlan; u32 changed = BSS_CHANGED_BEACON_INT | @@ -969,8 +972,10 @@ static int ieee80211_start_ap(struct wiphy *wiphy, struct net_device *dev, sdata->needed_rx_chains = sdata->local->rx_chains; sdata->radar_required = params->radar_required; + mutex_lock(&local->mtx); err = ieee80211_vif_use_channel(sdata, ¶ms->chandef, IEEE80211_CHANCTX_SHARED); + mutex_unlock(&local->mtx); if (err) return err; ieee80211_vif_copy_chanctx_to_vlans(sdata, false); @@ -1121,7 +1126,9 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev) skb_queue_purge(&sdata->u.ap.ps.bc_buf); ieee80211_vif_copy_chanctx_to_vlans(sdata, true); + mutex_lock(&local->mtx); ieee80211_vif_release_channel(sdata); + mutex_unlock(&local->mtx); return 0; } @@ -1944,8 +1951,10 @@ static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev, sdata->smps_mode = IEEE80211_SMPS_OFF; sdata->needed_rx_chains = sdata->local->rx_chains; + mutex_lock(&sdata->local->mtx); err = ieee80211_vif_use_channel(sdata, &setup->chandef, IEEE80211_CHANCTX_SHARED); + mutex_unlock(&sdata->local->mtx); if (err) return err; @@ -1957,7 +1966,9 @@ static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev) struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); ieee80211_stop_mesh(sdata); + mutex_lock(&sdata->local->mtx); ieee80211_vif_release_channel(sdata); + mutex_unlock(&sdata->local->mtx); return 0; } @@ -2895,8 +2906,11 @@ static int ieee80211_start_radar_detection(struct wiphy *wiphy, unsigned long timeout; int err; - if (!list_empty(&local->roc_list) || local->scanning) - return -EBUSY; + mutex_lock(&local->mtx); + if (!list_empty(&local->roc_list) || local->scanning) { + err = -EBUSY; + goto out_unlock; + } /* whatever, but channel contexts should not complain about that one */ sdata->smps_mode = IEEE80211_SMPS_OFF; @@ -2906,13 +2920,15 @@ static int ieee80211_start_radar_detection(struct wiphy *wiphy, err = ieee80211_vif_use_channel(sdata, chandef, IEEE80211_CHANCTX_SHARED); if (err) - return err; + goto out_unlock; timeout = msecs_to_jiffies(IEEE80211_DFS_MIN_CAC_TIME_MS); ieee80211_queue_delayed_work(&sdata->local->hw, &sdata->dfs_cac_timer_work, timeout); - return 0; + out_unlock: + mutex_unlock(&local->mtx); + return err; } static struct cfg80211_beacon_data * @@ -2988,7 +3004,9 @@ void ieee80211_csa_finalize_work(struct work_struct *work) goto unlock; sdata->radar_required = sdata->csa_radar_required; + mutex_lock(&local->mtx); err = ieee80211_vif_change_channel(sdata, &changed); + mutex_unlock(&local->mtx); if (WARN_ON(err < 0)) goto unlock; |