iwlagn: return error if PAN disable timeout

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-rxon.c

@@ -74,8 +74,10 @@ static int iwlagn_disable_pan(struct iwl_priv *priv,
 		signed long wait_res;
 
 		wait_res = iwlagn_wait_notification(priv, &disable_wait, HZ);
-		if (wait_res == 0)
+		if (wait_res == 0) {
 			IWL_ERR(priv, "Timed out waiting for PAN disable\n");
+			ret = -EIO;
+		}
 	}
 
 	return ret;