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Subject[PATCH 4/5] ath10k: detect conf_mutex held ath10k_drain_tx() calls
Date
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
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