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>

diff --git a/net/mac80211/ht.c b/net/mac80211/ht.c
index 61ac7c48ac0c48dfff325c5d11bdcf5ef549f907..9e7560becbbb39fa66567b03447fbc154100e2b6 100644 (file)
--- 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,