cfg80211: remove remain-on-channel channel type

As mwifiex (and mac80211 in the software case) are the
only drivers actually implementing remain-on-channel
with channel type, userspace can't be relying on it.
This is the case, as it's used only for P2P operations
right now.

Rather than adding a flag to tell userspace whether or
not it can actually rely on it, simplify all the code
by removing the ability to use different channel types.
Leave only the validation of the attribute, so that if
we extend it again later (with the needed capability
flag), it can't break userspace sending invalid data.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

6 files changed, 16 insertions, 34 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index 18926aea480c..ac0241e3539b 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2236,7 +2236,6 @@ static int ieee80211_set_bitrate_mask(struct wiphy *wiphy,
 static int ieee80211_start_roc_work(struct ieee80211_local *local,
                                     struct ieee80211_sub_if_data *sdata,
                                     struct ieee80211_channel *channel,
-                                    enum nl80211_channel_type channel_type,
                                     unsigned int duration, u64 *cookie,
                                     struct sk_buff *txskb)
 {
@@ -2254,7 +2253,6 @@ static int ieee80211_start_roc_work(struct ieee80211_local *local,
                 return -ENOMEM;
 
         roc->chan = channel;
-        roc->chan_type = channel_type;
         roc->duration = duration;
         roc->req_duration = duration;
         roc->frame = txskb;
@@ -2287,8 +2285,7 @@ static int ieee80211_start_roc_work(struct ieee80211_local *local,
         if (!duration)
                 duration = 10;
 
-        ret = drv_remain_on_channel(local, sdata, channel, channel_type,
-                                    duration);
+        ret = drv_remain_on_channel(local, sdata, channel, duration);
         if (ret) {
                 kfree(roc);
                 return ret;
@@ -2299,8 +2296,7 @@ static int ieee80211_start_roc_work(struct ieee80211_local *local,
 
  out_check_combine:
         list_for_each_entry(tmp, &local->roc_list, list) {
-                if (tmp->chan != channel || tmp->chan_type != channel_type ||
-                    tmp->sdata != sdata)
+                if (tmp->chan != channel || tmp->sdata != sdata)
                         continue;
 
                 /*
@@ -2417,7 +2413,6 @@ static int ieee80211_start_roc_work(struct ieee80211_local *local,
 static int ieee80211_remain_on_channel(struct wiphy *wiphy,
                                        struct wireless_dev *wdev,
                                        struct ieee80211_channel *chan,
-                                       enum nl80211_channel_type channel_type,
                                        unsigned int duration,
                                        u64 *cookie)
 {
@@ -2426,7 +2421,7 @@ static int ieee80211_remain_on_channel(struct wiphy *wiphy,
         int ret;
 
         mutex_lock(&local->mtx);
-        ret = ieee80211_start_roc_work(local, sdata, chan, channel_type,
+        ret = ieee80211_start_roc_work(local, sdata, chan,
                                        duration, cookie, NULL);
         mutex_unlock(&local->mtx);
 
@@ -2519,10 +2514,8 @@ static int ieee80211_cancel_remain_on_channel(struct wiphy *wiphy,
 
 static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
                              struct ieee80211_channel *chan, bool offchan,
-                             enum nl80211_channel_type channel_type,
-                             bool channel_type_valid, unsigned int wait,
-                             const u8 *buf, size_t len, bool no_cck,
-                             bool dont_wait_for_ack, u64 *cookie)
+                             unsigned int wait, const u8 *buf, size_t len,
+                             bool no_cck, bool dont_wait_for_ack, u64 *cookie)
 {
         struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
         struct ieee80211_local *local = sdata->local;
@@ -2591,14 +2584,10 @@ 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) {
+                if (chanctx_conf)
                         need_offchan = chan != chanctx_conf->channel;
-                        if (channel_type_valid &&
-                            channel_type != chanctx_conf->channel_type)
-                                need_offchan = true;
-                } else {
+                else
                         need_offchan = true;
-                }
                 rcu_read_unlock();
         }
 
@@ -2633,7 +2622,7 @@ static int ieee80211_mgmt_tx(struct wiphy *wiphy, struct wireless_dev *wdev,
                         local->hw.offchannel_tx_hw_queue;
 
         /* This will handle all kinds of coalescing and immediate TX */
-        ret = ieee80211_start_roc_work(local, sdata, chan, channel_type,
+        ret = ieee80211_start_roc_work(local, sdata, chan,
                                        wait, cookie, skb);
         if (ret)
                 kfree_skb(skb);
diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index 68c27aaf5c93..c6560cc7a9d6 100644
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -738,16 +738,15 @@ static inline int drv_get_antenna(struct ieee80211_local *local,
 static inline int drv_remain_on_channel(struct ieee80211_local *local,
                                         struct ieee80211_sub_if_data *sdata,
                                         struct ieee80211_channel *chan,
-                                        enum nl80211_channel_type chantype,
                                         unsigned int duration)
 {
         int ret;
 
         might_sleep();
 
-        trace_drv_remain_on_channel(local, sdata, chan, chantype, duration);
+        trace_drv_remain_on_channel(local, sdata, chan, duration);
         ret = local->ops->remain_on_channel(&local->hw, &sdata->vif,
-                                            chan, chantype, duration);
+                                            chan, duration);
         trace_drv_return_int(local, ret);
 
         return ret;
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index d5da0fe14318..fba4b1f425c1 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -348,7 +348,6 @@ struct ieee80211_roc_work {
         struct ieee80211_sub_if_data *sdata;
 
         struct ieee80211_channel *chan;
-        enum nl80211_channel_type chan_type;
 
         bool started, abort, hw_begun, notified;
 
@@ -1048,7 +1047,6 @@ struct ieee80211_local {
 
         /* Temporary remain-on-channel for off-channel operations */
         struct ieee80211_channel *tmp_channel;
-        enum nl80211_channel_type tmp_channel_type;
 
         /* channel contexts */
         struct list_head chanctx_list;
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 70e87600cacc..b229cded4567 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -115,7 +115,7 @@ static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local)
                         channel_type = NL80211_CHAN_NO_HT;
         } else if (local->tmp_channel) {
                 chan = local->tmp_channel;
-                channel_type = local->tmp_channel_type;
+                channel_type = NL80211_CHAN_NO_HT;
         } else {
                 chan = local->_oper_channel;
                 channel_type = local->_oper_channel_type;
diff --git a/net/mac80211/offchannel.c b/net/mac80211/offchannel.c
index 7f8a36510813..5abddfe3e101 100644
--- a/net/mac80211/offchannel.c
+++ b/net/mac80211/offchannel.c
@@ -205,8 +205,8 @@ void ieee80211_handle_roc_started(struct ieee80211_roc_work *roc)
                 }
         } else {
                 cfg80211_ready_on_channel(&roc->sdata->wdev, roc->cookie,
-                                          roc->chan, roc->chan_type,
-                                          roc->req_duration, GFP_KERNEL);
+                                          roc->chan, roc->req_duration,
+                                          GFP_KERNEL);
         }
 
         roc->notified = true;
@@ -284,7 +284,6 @@ void ieee80211_start_next_roc(struct ieee80211_local *local)
                         duration = 10;
 
                 ret = drv_remain_on_channel(local, roc->sdata, roc->chan,
-                                            roc->chan_type,
                                             duration);
 
                 roc->started = true;
@@ -321,7 +320,7 @@ void ieee80211_roc_notify_destroy(struct ieee80211_roc_work *roc)
         if (!roc->mgmt_tx_cookie)
                 cfg80211_remain_on_channel_expired(&roc->sdata->wdev,
                                                    roc->cookie, roc->chan,
-                                                   roc->chan_type, GFP_KERNEL);
+                                                   GFP_KERNEL);
 
         list_for_each_entry_safe(dep, tmp, &roc->dependents, list)
                 ieee80211_roc_notify_destroy(dep);
@@ -359,7 +358,6 @@ void ieee80211_sw_roc_work(struct work_struct *work)
                 ieee80211_recalc_idle(local);
 
                 local->tmp_channel = roc->chan;
-                local->tmp_channel_type = roc->chan_type;
                 ieee80211_hw_config(local, 0);
 
                 /* tell userspace or send frame */
diff --git a/net/mac80211/trace.h b/net/mac80211/trace.h
index e9579b7a2cd0..bc28346ba207 100644
--- a/net/mac80211/trace.h
+++ b/net/mac80211/trace.h
@@ -1022,15 +1022,14 @@ TRACE_EVENT(drv_remain_on_channel,
         TP_PROTO(struct ieee80211_local *local,
                  struct ieee80211_sub_if_data *sdata,
                  struct ieee80211_channel *chan,
-                 enum nl80211_channel_type chantype, unsigned int duration),
+                 unsigned int duration),
 
-        TP_ARGS(local, sdata, chan, chantype, duration),
+        TP_ARGS(local, sdata, chan, duration),
 
         TP_STRUCT__entry(
                 LOCAL_ENTRY
                 VIF_ENTRY
                 __field(int, center_freq)
-                __field(int, channel_type)
                 __field(unsigned int, duration)
         ),
 
@@ -1038,7 +1037,6 @@ TRACE_EVENT(drv_remain_on_channel,
                 LOCAL_ASSIGN;
                 VIF_ASSIGN;
                 __entry->center_freq = chan->center_freq;
-                __entry->channel_type = chantype;
                 __entry->duration = duration;
         ),