mac80211: let flush() drop packets when possible

When roaming / suspending, it makes no sense to wait until
the transmit queues of the device are empty. In extreme
condition they can be starved (VO saturating the air), but
even in regular cases, it is pointless to delay the roaming
because the low level driver is trying to send packets to
an AP which is far away. We'd rather drop these packets and
let TCP retransmit if needed. This will allow to speed up
the roaming.

For suspend, the explanation is even more trivial.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index ad8cb4fb441e..83ba6cd9cf8d 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -578,7 +578,7 @@ ieee80211_get_vif_queues(struct ieee80211_local *local,
 
 void __ieee80211_flush_queues(struct ieee80211_local *local,
                               struct ieee80211_sub_if_data *sdata,
-                              unsigned int queues)
+                              unsigned int queues, bool drop)
 {
         if (!local->ops->flush)
                 return;
@@ -594,7 +594,7 @@ void __ieee80211_flush_queues(struct ieee80211_local *local,
                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
                                         false);
 
-        drv_flush(local, sdata, queues, false);
+        drv_flush(local, sdata, queues, drop);
 
         ieee80211_wake_queues_by_reason(&local->hw, queues,
                                         IEEE80211_QUEUE_STOP_REASON_FLUSH,
@@ -602,9 +602,9 @@ void __ieee80211_flush_queues(struct ieee80211_local *local,
 }
 
 void ieee80211_flush_queues(struct ieee80211_local *local,
-                            struct ieee80211_sub_if_data *sdata)
+                            struct ieee80211_sub_if_data *sdata, bool drop)
 {
-        __ieee80211_flush_queues(local, sdata, 0);
+        __ieee80211_flush_queues(local, sdata, 0, drop);
 }
 
 void ieee80211_stop_vif_queues(struct ieee80211_local *local,