iwlwifi: move iwl_clear_driver_stations to user

There's only one place using this function, so
move it where it's needed.

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>

1 files changed, 35 insertions, 0 deletions

diff --git a/drivers/net/wireless/iwlwifi/iwl-agn.c b/drivers/net/wireless/iwlwifi/iwl-agn.c
index e0fef9f257c..a7f3a7023d8 100644
--- a/drivers/net/wireless/iwlwifi/iwl-agn.c
+++ b/drivers/net/wireless/iwlwifi/iwl-agn.c
@@ -738,6 +738,41 @@ int iwl_alive_start(struct iwl_priv *priv)
 	return iwl_power_update_mode(priv, true);
 }
 
+/**
+ * iwl_clear_driver_stations - clear knowledge of all stations from driver
+ * @priv: iwl priv struct
+ *
+ * This is called during iwl_down() to make sure that in the case
+ * we're coming there from a hardware restart mac80211 will be
+ * able to reconfigure stations -- if we're getting there in the
+ * normal down flow then the stations will already be cleared.
+ */
+static void iwl_clear_driver_stations(struct iwl_priv *priv)
+{
+	unsigned long flags;
+	struct iwl_rxon_context *ctx;
+
+	spin_lock_irqsave(&priv->shrd->sta_lock, flags);
+	memset(priv->stations, 0, sizeof(priv->stations));
+	priv->num_stations = 0;
+
+	priv->ucode_key_table = 0;
+
+	for_each_context(priv, ctx) {
+		/*
+		 * Remove all key information that is not stored as part
+		 * of station information since mac80211 may not have had
+		 * a chance to remove all the keys. When device is
+		 * reconfigured by mac80211 after an error all keys will
+		 * be reconfigured.
+		 */
+		memset(ctx->wep_keys, 0, sizeof(ctx->wep_keys));
+		ctx->key_mapping_keys = 0;
+	}
+
+	spin_unlock_irqrestore(&priv->shrd->sta_lock, flags);
+}
+
 void iwl_down(struct iwl_priv *priv)
 {
 	int exit_pending;