# \[PATCH 4/5\] ath10k: detect conf\_mutex held ath10k\_drain\_tx() calls - From: Shuah Khan \ - Date: 2021-02-10 02:05:11 - List: netdev - Page: https://ratatoskr.run/netdev/2021/02/6265104 - Thread: https://ratatoskr.run/linux-wireless/2021/02/6265098/t.md ```text ath10k_drain_tx() must not be called with conf_mutex held as workers can use that also. Add check to detect conf_mutex held calls. Signed-off-by: Shuah Khan --- drivers/net/wireless/ath/ath10k/mac.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index 53f92945006f..3545ce7dce0a 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -4566,6 +4566,7 @@ static void ath10k_mac_op_wake_tx_queue(struct ieee80211_hw *hw, /* Must not be called with conf_mutex held as workers can use that also. */ void ath10k_drain_tx(struct ath10k *ar) { + WARN_ON(lockdep_is_held(&ar->conf_mutex)); /* make sure rcu-protected mac80211 tx path itself is drained */ synchronize_net(); -- 2.27.0 ```