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ath9k: Use mutex_lock to avoid potential race in start/stop rng

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Move ath9k_rng_stop/ath9k_rng_start pair into critical section,
use mutex_lock to void potential race accessing.

Signed-off-by: Miaoqing Pan <miaoqing@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Miaoqing Pan 2017-06-27 17:31:55 +03:00 committed by Kalle Valo
parent 473becac4b
commit f23cdfb3fe
1 changed files with 4 additions and 4 deletions
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8
drivers/net/wireless/ath/ath9k/main.c
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@ -731,12 +731,12 @@ static int ath9k_start(struct ieee80211_hw *hw)
spin_unlock_bh(&sc->sc_pcu_lock);
ath9k_rng_start(sc);
mutex_unlock(&sc->mutex);
ath9k_ps_restore(sc);
ath9k_rng_start(sc);
return 0;
}
@ -826,10 +826,10 @@ static void ath9k_stop(struct ieee80211_hw *hw)
ath9k_deinit_channel_context(sc);
ath9k_rng_stop(sc);
mutex_lock(&sc->mutex);
ath9k_rng_stop(sc);
ath_cancel_work(sc);
if (test_bit(ATH_OP_INVALID, &common->op_flags)) {