mac80211: introduce refcount for queue_stop_reasons

Sometimes different vifs may be stopping the queues for the same
reason (e.g. when several interfaces are performing a channel switch).
Instead of using a bitmask for the reasons, use an integer that holds
a refcount instead.  In order to keep it backwards compatible,
introduce a boolean in some functions that tell us whether the queue
stopping should be refcounted or not.  For now, use not refcounted for
all calls to keep it functionally the same as before.

Signed-off-by: Luciano Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index af3eac482acd..e920d48f0209 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -837,7 +837,8 @@ static int ieee80211_stop_ap(struct wiphy *wiphy, struct net_device *dev)
         if (!ieee80211_csa_needs_block_tx(local))
                 ieee80211_wake_queues_by_reason(&local->hw,
                                         IEEE80211_MAX_QUEUE_MAP,
-                                        IEEE80211_QUEUE_STOP_REASON_CSA);
+                                        IEEE80211_QUEUE_STOP_REASON_CSA,
+                                        false);
         mutex_unlock(&local->mtx);
 
         kfree(sdata->u.ap.next_beacon);
@@ -2828,7 +2829,8 @@ static int __ieee80211_csa_finalize(struct ieee80211_sub_if_data *sdata)
         if (!ieee80211_csa_needs_block_tx(local))
                 ieee80211_wake_queues_by_reason(&local->hw,
                                         IEEE80211_MAX_QUEUE_MAP,
-                                        IEEE80211_QUEUE_STOP_REASON_CSA);
+                                        IEEE80211_QUEUE_STOP_REASON_CSA,
+                                        false);
 
         return 0;
 }
@@ -3060,7 +3062,8 @@ __ieee80211_channel_switch(struct wiphy *wiphy, struct net_device *dev,
         if (sdata->csa_block_tx)
                 ieee80211_stop_queues_by_reason(&local->hw,
                                         IEEE80211_MAX_QUEUE_MAP,
-                                        IEEE80211_QUEUE_STOP_REASON_CSA);
+                                        IEEE80211_QUEUE_STOP_REASON_CSA,
+                                        false);
 
         if (changed) {
                 ieee80211_bss_info_change_notify(sdata, changed);