diff mbox series

[28/40] wifi: cfg80211: check wiphy mutex is held for wdev mutex

Message ID 20230828135928.cb773b6c358c.I31b42971dffe8e77248cef445c6563b97f9138b0@changeid
State New
Headers show
Series wifi: cfg80211/mac80211: locking cleanups | expand

Commit Message

Johannes Berg Aug. 28, 2023, 11:59 a.m. UTC 
From: Johannes Berg <johannes.berg@intel.com>

This might seem pretty pointless rather than changing the locking
immediately, but it seems safer to run for a while with checks and
the old locking scheme, and then remove the wdev lock later.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
 net/wireless/core.h | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/net/wireless/core.h b/net/wireless/core.h
index b9876b444e1b..5dc76ea3b84e 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -238,6 +238,7 @@  void cfg80211_register_wdev(struct cfg80211_registered_device *rdev,
 static inline void wdev_lock(struct wireless_dev *wdev)
 	__acquires(wdev)
 {
+	lockdep_assert_held(&wdev->wiphy->mtx);
 	mutex_lock(&wdev->mtx);
 	__acquire(wdev->mtx);
 }
@@ -245,11 +246,16 @@  static inline void wdev_lock(struct wireless_dev *wdev)
 static inline void wdev_unlock(struct wireless_dev *wdev)
 	__releases(wdev)
 {
+	lockdep_assert_held(&wdev->wiphy->mtx);
 	__release(wdev->mtx);
 	mutex_unlock(&wdev->mtx);
 }
 
-#define ASSERT_WDEV_LOCK(wdev) lockdep_assert_held(&(wdev)->mtx)
+static inline void ASSERT_WDEV_LOCK(struct wireless_dev *wdev)
+{
+	lockdep_assert_held(&wdev->wiphy->mtx);
+	lockdep_assert_held(&wdev->mtx);
+}
 
 static inline bool cfg80211_has_monitors_only(struct cfg80211_registered_device *rdev)
 {