Merge tag 'fuse-update-6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi...

[linux-2.6-microblaze.git] / net / mac80211 / ht.c

diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 2eb3a40..8c24817 100644 (file)
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -140,12 +140,14 @@ bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
                                       const struct ieee80211_ht_cap *ht_cap_ie,
                                       struct link_sta_info *link_sta)
 {
+       struct ieee80211_bss_conf *link_conf;
        struct sta_info *sta = link_sta->sta;
        struct ieee80211_sta_ht_cap ht_cap, own_cap;
        u8 ampdu_info, tx_mcs_set_cap;
        int i, max_tx_streams;
        bool changed;
        enum ieee80211_sta_rx_bandwidth bw;
+       enum nl80211_chan_width width;
 
        memset(&ht_cap, 0, sizeof(ht_cap));
 
@@ -248,7 +250,14 @@ bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
 
        memcpy(&link_sta->pub->ht_cap, &ht_cap, sizeof(ht_cap));
 
-       switch (sdata->vif.link_conf[link_sta->link_id]->chandef.width) {
+       rcu_read_lock();
+       link_conf = rcu_dereference(sdata->vif.link_conf[link_sta->link_id]);
+       if (WARN_ON(!link_conf))
+               width = NL80211_CHAN_WIDTH_20_NOHT;
+       else
+               width = link_conf->chandef.width;
+
+       switch (width) {
        default:
                WARN_ON_ONCE(1);
                fallthrough;
@@ -264,6 +273,7 @@ bool ieee80211_ht_cap_ie_to_sta_ht_cap(struct ieee80211_sub_if_data *sdata,
                                IEEE80211_STA_RX_BW_40 : IEEE80211_STA_RX_BW_20;
                break;
        }
+       rcu_read_unlock();
 
        link_sta->pub->bandwidth = bw;
 
@@ -540,35 +550,27 @@ int ieee80211_send_smps_action(struct ieee80211_sub_if_data *sdata,
        return 0;
 }
 
-void ieee80211_request_smps_mgd_work(struct work_struct *work)
-{
-       struct ieee80211_link_data *link =
-               container_of(work, struct ieee80211_link_data,
-                            u.mgd.request_smps_work);
-
-       sdata_lock(link->sdata);
-       __ieee80211_request_smps_mgd(link->sdata, link->link_id,
-                                    link->u.mgd.driver_smps_mode);
-       sdata_unlock(link->sdata);
-}
-
 void ieee80211_request_smps(struct ieee80211_vif *vif, unsigned int link_id,
                            enum ieee80211_smps_mode smps_mode)
 {
        struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
-       struct ieee80211_link_data *link = sdata->link[link_id];
+       struct ieee80211_link_data *link;
 
        if (WARN_ON_ONCE(vif->type != NL80211_IFTYPE_STATION))
                return;
 
+       rcu_read_lock();
+       link = rcu_dereference(sdata->link[link_id]);
        if (WARN_ON(!link))
-               return;
+               goto out;
 
        if (link->u.mgd.driver_smps_mode == smps_mode)
-               return;
+               goto out;
 
        link->u.mgd.driver_smps_mode = smps_mode;
        ieee80211_queue_work(&sdata->local->hw, &link->u.mgd.request_smps_work);
+out:
+       rcu_read_unlock();
 }
 /* this might change ... don't want non-open drivers using it */
 EXPORT_SYMBOL_GPL(ieee80211_request_smps);