| Message ID | 1438931301-27081-1-git-send-email-michal.kazior@tieto.com (mailing list archive) |
|---|---|
| State | Accepted |
| Headers | show |
Michal Kazior <michal.kazior@tieto.com> writes: > Vif's vdev_id is used as queue number. However due > to the tx pausing design in ath10k it was possible > for a new interface to be created with its tx > queue stopped (via ieee80211_stop_queues). This > could in turn leave the interface inoperable until > ath10k_mac_tx_unlock() was called. > > This problem only affected multi-vif scenarios when > new interfaces were created some time later after > other interfaces have been running for some time > and had Tx queue full at some point prior. > > Possible manifestation of the bug was > authentication timeout for a client vif. > > Fixes: 96d828d45e16 ("ath10k: rework tx queue locking") > Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Thanks, applied.
diff --git a/drivers/net/wireless/ath/ath10k/mac.c b/drivers/net/wireless/ath/ath10k/mac.c index acd222f3b899..03e498cb64b4 100644 --- a/drivers/net/wireless/ath/ath10k/mac.c +++ b/drivers/net/wireless/ath/ath10k/mac.c @@ -4299,6 +4299,11 @@ static int ath10k_add_interface(struct ieee80211_hw *hw, } } + spin_lock_bh(&ar->htt.tx_lock); + if (!ar->tx_paused) + ieee80211_wake_queue(ar->hw, arvif->vdev_id); + spin_unlock_bh(&ar->htt.tx_lock); + mutex_unlock(&ar->conf_mutex); return 0;
Vif's vdev_id is used as queue number. However due to the tx pausing design in ath10k it was possible for a new interface to be created with its tx queue stopped (via ieee80211_stop_queues). This could in turn leave the interface inoperable until ath10k_mac_tx_unlock() was called. This problem only affected multi-vif scenarios when new interfaces were created some time later after other interfaces have been running for some time and had Tx queue full at some point prior. Possible manifestation of the bug was authentication timeout for a client vif. Fixes: 96d828d45e16 ("ath10k: rework tx queue locking") Signed-off-by: Michal Kazior <michal.kazior@tieto.com> --- drivers/net/wireless/ath/ath10k/mac.c | 5 +++++ 1 file changed, 5 insertions(+)