iwlagn: send simple LQ command for WoWLAN

For some reason, WoWLAN doesn't always seem to
be happy with more advanced LQ commands. Since
we don't need them as we're not going to send
a lot of data, simply program the station with
the very simple default LQ command.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/iwlwifi/iwl-agn-sta.c

@@ -35,22 +35,17 @@
 #include "iwl-agn.h"
 #include "iwl-trans.h"
 
-static struct iwl_link_quality_cmd *
-iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id)
+void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
+		     u8 sta_id, struct iwl_link_quality_cmd *link_cmd)
 {
 	int i, r;
-	struct iwl_link_quality_cmd *link_cmd;
 	u32 rate_flags = 0;
 	__le32 rate_n_flags;
 
-	link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
-	if (!link_cmd) {
-		IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
-		return NULL;
-	}
-
 	lockdep_assert_held(&priv->shrd->mutex);
 
+	memset(link_cmd, 0, sizeof(*link_cmd));
+
 	/* Set up the rate scaling to start at selected rate, fall back
 	 * all the way down to 1M in IEEE order, and then spin on 1M */
 	if (priv->band == IEEE80211_BAND_5GHZ)
@@ -87,6 +82,20 @@ iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id)
 		cpu_to_le16(LINK_QUAL_AGG_TIME_LIMIT_DEF);
 
 	link_cmd->sta_id = sta_id;
+}
+
+static struct iwl_link_quality_cmd *
+iwl_sta_alloc_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx, u8 sta_id)
+{
+	struct iwl_link_quality_cmd *link_cmd;
+
+	link_cmd = kzalloc(sizeof(struct iwl_link_quality_cmd), GFP_KERNEL);
+	if (!link_cmd) {
+		IWL_ERR(priv, "Unable to allocate memory for LQ cmd.\n");
+		return NULL;
+	}
+
+	iwl_sta_fill_lq(priv, ctx, sta_id, link_cmd);
 
 	return link_cmd;
 }

drivers/net/wireless/iwlwifi/iwl-sta.c

@@ -595,8 +595,11 @@ void iwl_restore_stations(struct iwl_priv *priv, struct iwl_rxon_context *ctx)
 			       sizeof(struct iwl_addsta_cmd));
 			send_lq = false;
 			if (priv->stations[i].lq) {
-				memcpy(&lq, priv->stations[i].lq,
-				       sizeof(struct iwl_link_quality_cmd));
+				if (priv->shrd->wowlan)
+					iwl_sta_fill_lq(priv, ctx, i, &lq);
+				else
+					memcpy(&lq, priv->stations[i].lq,
+					       sizeof(struct iwl_link_quality_cmd));
 				send_lq = true;
 			}
 			spin_unlock_irqrestore(&priv->shrd->sta_lock,

drivers/net/wireless/iwlwifi/iwl-sta.h

@@ -58,6 +58,8 @@ int iwl_mac_sta_remove(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 u8 iwl_prep_station(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 		    const u8 *addr, bool is_ap, struct ieee80211_sta *sta);
 
+void iwl_sta_fill_lq(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
+		     u8 sta_id, struct iwl_link_quality_cmd *link_cmd);
 int iwl_send_lq_cmd(struct iwl_priv *priv, struct iwl_rxon_context *ctx,
 		    struct iwl_link_quality_cmd *lq, u8 flags, bool init);
 void iwl_reprogram_ap_sta(struct iwl_priv *priv, struct iwl_rxon_context *ctx);