cfg80211/mac80211: use lockdep_assert_held

Instead of using a WARN_ON(!mutex_is_locked())
use lockdep_assert_held() which compiles away
completely when lockdep isn't enabled, and
also is a more accurate assertion since it
checks that the current thread is holding the
mutex.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

7 files changed, 17 insertions, 10 deletions

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index 32be11e..5b24740 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -11,7 +11,7 @@ __ieee80211_get_channel_mode(struct ieee80211_local *local,
 {
 	struct ieee80211_sub_if_data *sdata;
 
-	WARN_ON(!mutex_is_locked(&local->iflist_mtx));
+	lockdep_assert_held(&local->iflist_mtx);
 
 	list_for_each_entry(sdata, &local->interfaces, list) {
 		if (sdata == ignore)
diff --git a/net/mac80211/key.c b/net/mac80211/key.c
index 3570f8c..6a63d1a 100644
--- a/net/mac80211/key.c
+++ b/net/mac80211/key.c
@@ -49,7 +49,7 @@ static const u8 bcast_addr[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
 
 static void assert_key_lock(struct ieee80211_local *local)
 {
-	WARN_ON(!mutex_is_locked(&local->key_mtx));
+	lockdep_assert_held(&local->key_mtx);
 }
 
 static struct ieee80211_sta *get_sta_for_key(struct ieee80211_key *key)
diff --git a/net/mac80211/mlme.c b/net/mac80211/mlme.c
index 0cb822c..bfb0eab 100644
--- a/net/mac80211/mlme.c
+++ b/net/mac80211/mlme.c
@@ -92,7 +92,7 @@ enum rx_mgmt_action {
 /* utils */
 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
 {
-	WARN_ON(!mutex_is_locked(&ifmgd->mtx));
+	lockdep_assert_held(&ifmgd->mtx);
 }
 
 /*
diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index e356ff8..44e10a9 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -280,7 +280,7 @@ static int sta_info_finish_insert(struct sta_info *sta, bool async)
 	unsigned long flags;
 	int err = 0;
 
-	WARN_ON(!mutex_is_locked(&local->sta_mtx));
+	lockdep_assert_held(&local->sta_mtx);
 
 	/* notify driver */
 	if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index bd40b11..9f21a69 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -1296,9 +1296,9 @@ void ieee80211_recalc_smps(struct ieee80211_local *local,
 	int count = 0;
 
 	if (forsdata)
-		WARN_ON(!mutex_is_locked(&forsdata->u.mgd.mtx));
+		lockdep_assert_held(&forsdata->u.mgd.mtx);
 
-	WARN_ON(!mutex_is_locked(&local->iflist_mtx));
+	lockdep_assert_held(&local->iflist_mtx);
 
 	/*
 	 * This function could be improved to handle multiple
diff --git a/net/wireless/core.h b/net/wireless/core.h
index 58ab2c7..37580e0 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -95,7 +95,10 @@ extern struct mutex cfg80211_mutex;
 extern struct list_head cfg80211_rdev_list;
 extern int cfg80211_rdev_list_generation;
 
-#define assert_cfg80211_lock() WARN_ON(!mutex_is_locked(&cfg80211_mutex))
+static inline void assert_cfg80211_lock(void)
+{
+	lockdep_assert_held(&cfg80211_mutex);
+}
 
 /*
  * You can use this to mark a wiphy_idx as not having an associated wiphy.
@@ -202,8 +205,8 @@ static inline void wdev_unlock(struct wireless_dev *wdev)
 	mutex_unlock(&wdev->mtx);
 }
 
-#define ASSERT_RDEV_LOCK(rdev) WARN_ON(!mutex_is_locked(&(rdev)->mtx));
-#define ASSERT_WDEV_LOCK(wdev) WARN_ON(!mutex_is_locked(&(wdev)->mtx));
+#define ASSERT_RDEV_LOCK(rdev) lockdep_assert_held(&(rdev)->mtx)
+#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
 
 enum cfg80211_event_type {
 	EVENT_CONNECT_RESULT,
diff --git a/net/wireless/reg.c b/net/wireless/reg.c
index b0d9a08..d14bbf9 100644
--- a/net/wireless/reg.c
+++ b/net/wireless/reg.c
@@ -74,7 +74,11 @@ const struct ieee80211_regdomain *cfg80211_regdomain;
  *     - last_request
  */
 static DEFINE_MUTEX(reg_mutex);
-#define assert_reg_lock() WARN_ON(!mutex_is_locked(&reg_mutex))
+
+static inline void assert_reg_lock(void)
+{
+	lockdep_assert_held(&reg_mutex);
+}
 
 /* Used to queue up regulatory hints */
 static LIST_HEAD(reg_requests_list);