iwlwifi: fix FW restart on init FW

When unregistered with mac80211, we can't call its functionality
for FW restart, so avoid it and prevent automatic FW restart for
the init firmware.
Signed-off-by: Amit Beka <amit.beka@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/iwlwifi/dvm/main.c

@@ -862,7 +862,8 @@ void iwl_down(struct iwl_priv *priv)
 	 * No race since we hold the mutex here and a new one
 	 * can't come in at this time.
 	 */
-	ieee80211_remain_on_channel_expired(priv->hw);
+	if (priv->ucode_loaded && priv->cur_ucode != IWL_UCODE_INIT)
+		ieee80211_remain_on_channel_expired(priv->hw);
 
 	exit_pending =
 		test_and_set_bit(STATUS_EXIT_PENDING, &priv->status);
@@ -994,7 +995,11 @@ static void iwl_bg_restart(struct work_struct *data)
 		iwlagn_prepare_restart(priv);
 		mutex_unlock(&priv->mutex);
 		iwl_cancel_deferred_work(priv);
-		ieee80211_restart_hw(priv->hw);
+		if (priv->mac80211_registered)
+			ieee80211_restart_hw(priv->hw);
+		else
+			IWL_ERR(priv,
+				"Cannot request restart before registrating with mac80211");
 	} else {
 		WARN_ON(1);
 	}