[PATCH 4/5] ath10k: detect conf_mutex held ath10k_drain_tx() calls
From: Shuah Khan <skhan@linuxfoundation.org>
Date: 2021-02-10 02:05:11
Also in:
linux-wireless, lkml
Subsystem:
atheros ath generic utilities, qualcomm atheros ath10k wireless driver, the rest · Maintainers:
Jeff Johnson, Linus Torvalds
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 <skhan@linuxfoundation.org> --- 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