mac80211: Disable SMPS for the monitor interface

All antennas should be operational when monitoring to maximize
reception.

Signed-off-by: Ido Yariv <idox.yariv@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/net/mac80211/chan.c b/net/mac80211/chan.c
index bd1fd8ea5105..68bee813dfad 100644
--- a/net/mac80211/chan.c
+++ b/net/mac80211/chan.c
@@ -492,6 +492,13 @@ void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
                 rx_chains_static = max(rx_chains_static, needed_static);
                 rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic);
         }
+
+        /* Disable SMPS for the monitor interface */
+        sdata = rcu_dereference(local->monitor_sdata);
+        if (sdata &&
+            rcu_access_pointer(sdata->vif.chanctx_conf) == &chanctx->conf)
+                rx_chains_dynamic = rx_chains_static = local->rx_chains;
+
         rcu_read_unlock();
 
         if (!local->use_chanctx) {