mac80211: make mgmt_tx accept a NULL channel

[karo-tx-linux.git] / net / mac80211 / cfg.c

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index cd6f35f6e714be709ff8c464712339e15ebc7be1..64cf294c2b9680329f3925857305ca7843a6281b 100644 (file)
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2841,6 +2841,12 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
                return -EOPNOTSUPP;
        }
 
+       /* configurations requiring offchan cannot work if no channel has been
+        * specified
+        */
+       if (need_offchan && !chan)
+               return -EINVAL;
+
        mutex_lock(&local->mtx);
 
        /* Check if the operating channel is the requested channel */
@@ -2850,10 +2856,15 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
                rcu_read_lock();
                chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
 
-               if (chanctx_conf)
-                       need_offchan = chan != chanctx_conf->def.chan;
-               else
+               if (chanctx_conf) {
+                       need_offchan = chan && (chan != chanctx_conf->def.chan);
+               } else if (!chan) {
+                       ret = -EINVAL;
+                       rcu_read_unlock();
+                       goto out_unlock;
+               } else {
                        need_offchan = true;
+               }
                rcu_read_unlock();
        }