From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
commit ea888357ec005abffb95acee2e61aac68dff429c upstream
We do not kill any scheduled tasklets when stopping device, that may
cause usage of resources after free. Disable interrupts, kill tasklets
and then works in correct order.
Cc: stable@xxxxxxxxxx
Tested-by: Sujith <m.sujith@xxxxxxxxx>
Signed-off-by: Stanislaw Gruszka <sgruszka@xxxxxxxxxx>
Signed-off-by: John W. Linville <linville@xxxxxxxxxxxxx>
---
drivers/net/wireless/ath/ath9k/htc_drv_init.c | 3 ---
drivers/net/wireless/ath/ath9k/htc_drv_main.c | 19 ++++++++++++++-----
2 files changed, 14 insertions(+), 8 deletions(-)
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
index 8776f49..51029a2 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c
@@ -142,9 +142,6 @@ static void ath9k_deinit_priv(struct ath9k_htc_priv *priv)
{
ath9k_htc_exit_debug(priv->ah);
ath9k_hw_deinit(priv->ah);
- tasklet_kill(&priv->wmi_tasklet);
- tasklet_kill(&priv->rx_tasklet);
- tasklet_kill(&priv->tx_tasklet);
kfree(priv->ah);
priv->ah = NULL;
}
diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_main.c b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
index 51977ca..41dc30d 100644
--- a/drivers/net/wireless/ath/ath9k/htc_drv_main.c
+++ b/drivers/net/wireless/ath/ath9k/htc_drv_main.c
@@ -1228,18 +1228,27 @@ static void ath9k_htc_stop(struct ieee80211_hw *hw)
return;
}
- /* Cancel all the running timers/work .. */
- cancel_work_sync(&priv->ps_work);
- cancel_delayed_work_sync(&priv->ath9k_led_blink_work);
- ath9k_led_stop_brightness(priv);
-
ath9k_htc_ps_wakeup(priv);
htc_stop(priv->htc);
WMI_CMD(WMI_DISABLE_INTR_CMDID);
WMI_CMD(WMI_DRAIN_TXQ_ALL_CMDID);
WMI_CMD(WMI_STOP_RECV_CMDID);
+
+ tasklet_kill(&priv->wmi_tasklet);
+ tasklet_kill(&priv->rx_tasklet);
+ tasklet_kill(&priv->tx_tasklet);
+
skb_queue_purge(&priv->tx_queue);
+ mutex_unlock(&priv->mutex);
+
+ /* Cancel all the running timers/work .. */
+ cancel_work_sync(&priv->ps_work);
+ cancel_delayed_work_sync(&priv->ath9k_led_blink_work);
+ ath9k_led_stop_brightness(priv);
+
+ mutex_lock(&priv->mutex);
+
/* Remove monitor interface here */
if (ah->opmode == NL80211_IFTYPE_MONITOR) {
if (ath9k_htc_remove_monitor_interface(priv))
--
1.7.4.15.g7811d
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