mac80211: mark TX-during-stop for TX in in_reconfig

Mark TXQs as having seen transmit while they were stopped if
we bail out of drv_wake_tx_queue() due to reconfig, so that
the queue wake after this will make them catch up. This is
particularly necessary for when TXQs are used for management
packets since those TXQs won't see a lot of traffic that'd
make them catch up later.

Cc: stable@vger.kernel.org
Fixes: 4856bfd23098 ("mac80211: do not call driver wake_tx_queue op during reconfig")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211129152938.4573a221c0e1.I0d1d5daea3089be3fc0dccc92991b0f8c5677f0c@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/driver-ops.h b/net/mac80211/driver-ops.h
index cd3731cbf6c6814dbc266b404774ae733bd05d8e..c336267f4599c430812d67ba1fb97cd5404a7481 100644 (file)
--- a/net/mac80211/driver-ops.h
+++ b/net/mac80211/driver-ops.h
@@ -1219,8 +1219,11 @@ static inline void drv_wake_tx_queue(struct ieee80211_local *local,
 {
        struct ieee80211_sub_if_data *sdata = vif_to_sdata(txq->txq.vif);
 
-       if (local->in_reconfig)
+       /* In reconfig don't transmit now, but mark for waking later */
+       if (local->in_reconfig) {
+               set_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txq->flags);
                return;
+       }
 
        if (!check_sdata_in_driver(sdata))
                return;