diff options
| author | Miaoqing Pan <miaoqing@codeaurora.org> | 2017-06-27 16:31:55 +0200 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2017-06-28 18:54:43 +0200 |
| commit | f23cdfb3fe8f6e3502b8aebb819edf5669c1d802 (patch) | |
| tree | ebafab2c4a03b99e7fc29f76e1231f5bc7bb06a3 | |
| parent | ath9k: avoid potential freezing during random generator read (diff) | |
| download | linux-f23cdfb3fe8f6e3502b8aebb819edf5669c1d802.tar.xz linux-f23cdfb3fe8f6e3502b8aebb819edf5669c1d802.zip | |
ath9k: Use mutex_lock to avoid potential race in start/stop rng
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>
| -rw-r--r-- | drivers/net/wireless/ath/ath9k/main.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c index 9e65d14e7b1e..8b4ac7f0a09b 100644 --- a/drivers/net/wireless/ath/ath9k/main.c +++ b/drivers/net/wireless/ath/ath9k/main.c @@ -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)) { |