wifi: mac80211: move key tailroom work to wiphy work

This way we hold the wiphy mutex there, as a step towards
removing some of the additional locks we have.
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/ieee80211_i.h

@@ -1041,7 +1041,7 @@ struct ieee80211_sub_if_data {
 	/* count for keys needing tailroom space allocation */
 	int crypto_tx_tailroom_needed_cnt;
 	int crypto_tx_tailroom_pending_dec;
-	struct delayed_work dec_tailroom_needed_wk;
+	struct wiphy_delayed_work dec_tailroom_needed_wk;
 
 	struct net_device *dev;
 	struct ieee80211_local *local;

net/mac80211/iface.c

@@ -2149,8 +2149,8 @@ int ieee80211_if_add(struct ieee80211_local *local, const char *name,
 
 	INIT_LIST_HEAD(&sdata->key_list);
 
-	INIT_DELAYED_WORK(&sdata->dec_tailroom_needed_wk,
-			  ieee80211_delayed_tailroom_dec);
+	wiphy_delayed_work_init(&sdata->dec_tailroom_needed_wk,
+				ieee80211_delayed_tailroom_dec);
 
 	for (i = 0; i < NUM_NL80211_BANDS; i++) {
 		struct ieee80211_supported_band *sband;

net/mac80211/key.c

@@ -775,8 +775,9 @@ static void __ieee80211_key_destroy(struct ieee80211_key *key,
 		if (delay_tailroom) {
 			/* see ieee80211_delayed_tailroom_dec */
 			sdata->crypto_tx_tailroom_pending_dec++;
-			schedule_delayed_work(&sdata->dec_tailroom_needed_wk,
-					      HZ/2);
+			wiphy_delayed_work_queue(sdata->local->hw.wiphy,
+						 &sdata->dec_tailroom_needed_wk,
+						 HZ / 2);
 		} else {
 			decrease_tailroom_need_count(sdata, 1);
 		}
@@ -1122,7 +1123,8 @@ void ieee80211_free_keys(struct ieee80211_sub_if_data *sdata,
 	struct ieee80211_key *key, *tmp;
 	LIST_HEAD(keys);
 
-	cancel_delayed_work_sync(&sdata->dec_tailroom_needed_wk);
+	wiphy_delayed_work_cancel(local->hw.wiphy,
+				  &sdata->dec_tailroom_needed_wk);
 
 	mutex_lock(&local->key_mtx);
 
@@ -1193,7 +1195,8 @@ void ieee80211_free_sta_keys(struct ieee80211_local *local,
 	mutex_unlock(&local->key_mtx);
 }
 
-void ieee80211_delayed_tailroom_dec(struct work_struct *wk)
+void ieee80211_delayed_tailroom_dec(struct wiphy *wiphy,
+				    struct wiphy_work *wk)
 {
 	struct ieee80211_sub_if_data *sdata;
 

net/mac80211/key.h

@@ -2,7 +2,7 @@
 /*
  * Copyright 2002-2004, Instant802 Networks, Inc.
  * Copyright 2005, Devicescape Software, Inc.
- * Copyright (C) 2019, 2022 Intel Corporation
+ * Copyright (C) 2019, 2022-2023 Intel Corporation
  */
 
 #ifndef IEEE80211_KEY_H
@@ -174,6 +174,7 @@ int ieee80211_key_switch_links(struct ieee80211_sub_if_data *sdata,
 #define rcu_dereference_check_key_mtx(local, ref) \
 	rcu_dereference_check(ref, lockdep_is_held(&((local)->key_mtx)))
 
-void ieee80211_delayed_tailroom_dec(struct work_struct *wk);
+void ieee80211_delayed_tailroom_dec(struct wiphy *wiphy,
+				    struct wiphy_work *wk);
 
 #endif /* IEEE80211_KEY_H */

net/mac80211/main.c

@@ -372,7 +372,8 @@ static void ieee80211_restart_work(struct work_struct *work)
 				sdata_unlock(sdata);
 			}
 		}
-		flush_delayed_work(&sdata->dec_tailroom_needed_wk);
+		wiphy_delayed_work_flush(local->hw.wiphy,
+					 &sdata->dec_tailroom_needed_wk);
 	}
 	ieee80211_scan_cancel(local);
 

net/mac80211/pm.c

@@ -161,7 +161,8 @@ int __ieee80211_suspend(struct ieee80211_hw *hw, struct cfg80211_wowlan *wowlan)
 			break;
 		}
 
-		flush_delayed_work(&sdata->dec_tailroom_needed_wk);
+		wiphy_delayed_work_flush(local->hw.wiphy,
+					 &sdata->dec_tailroom_needed_wk);
 		drv_remove_interface(local, sdata);
 	}