mac80211: allow driver to be stateless wrt. SMSP requests

Bail out if no update is made to the SMPS state. This
allows the driver to avoid duplicating the state.

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

1 files changed, 3 insertions, 0 deletions

diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 61ac7c48ac0c..9e7560becbbb 100644
--- a/net/mac80211/ht.c
+++ b/net/mac80211/ht.c
@@ -406,6 +406,9 @@ void ieee80211_request_smps(struct ieee80211_vif *vif,
         if (WARN_ON(smps_mode == IEEE80211_SMPS_OFF))
                 smps_mode = IEEE80211_SMPS_AUTOMATIC;
 
+        if (sdata->u.mgd.driver_smps_mode == smps_mode)
+                return;
+
         sdata->u.mgd.driver_smps_mode = smps_mode;
 
         ieee80211_queue_work(&sdata->local->hw,