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, 11 insertions, 4 deletions

diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index d9af7ef3c11a..a0c7da809744 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -922,6 +922,8 @@ enum queue_stop_reason {
         IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
         IEEE80211_QUEUE_STOP_REASON_OFFCHANNEL,
         IEEE80211_QUEUE_STOP_REASON_FLUSH,
+
+        IEEE80211_QUEUE_STOP_REASONS,
 };
 
 #ifdef CONFIG_MAC80211_LEDS
@@ -1018,6 +1020,7 @@ struct ieee80211_local {
         struct workqueue_struct *workqueue;
 
         unsigned long queue_stop_reasons[IEEE80211_MAX_QUEUES];
+        int q_stop_reasons[IEEE80211_MAX_QUEUES][IEEE80211_QUEUE_STOP_REASONS];
         /* also used to protect ampdu_ac_queue and amdpu_ac_stop_refcnt */
         spinlock_t queue_stop_reason_lock;
 
@@ -1715,14 +1718,18 @@ void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
 
 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
                                      unsigned long queues,
-                                     enum queue_stop_reason reason);
+                                     enum queue_stop_reason reason,
+                                     bool refcounted);
 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
                                      unsigned long queues,
-                                     enum queue_stop_reason reason);
+                                     enum queue_stop_reason reason,
+                                     bool refcounted);
 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
-                                    enum queue_stop_reason reason);
+                                    enum queue_stop_reason reason,
+                                    bool refcounted);
 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
-                                    enum queue_stop_reason reason);
+                                    enum queue_stop_reason reason,
+                                    bool refcounted);
 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue);
 void ieee80211_add_pending_skb(struct ieee80211_local *local,
                                struct sk_buff *skb);