Do not disconnect STA based on inactivity on driver failure

Now that we can use driver_nl80211.c with non-mac80211 drivers that
implement SME/MLME internally, we may not get inactivity time from the
driver. If that is the case, we need to skip disconnection based on
maximum inactivity timeout. This fixes some unexpected disconnection
cases with ath6kl in AP mode.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>

src/ap/sta_info.c

@@ -284,8 +284,14 @@ void ap_handle_timer(void *eloop_ctx, void *timeout_ctx)
 		if (inactive_sec == -1) {
 			wpa_msg(hapd->msg_ctx, MSG_DEBUG,
 				"Check inactivity: Could not "
-				"get station info rom kernel driver for "
+				"get station info from kernel driver for "
 				MACSTR, MAC2STR(sta->addr));
+			/*
+			 * The driver may not support this functionality.
+			 * Anyway, try again after the next inactivity timeout,
+			 * but do not disconnect the station now.
+			 */
+			next_time = hapd->conf->ap_max_inactivity;
 		} else if (inactive_sec < hapd->conf->ap_max_inactivity &&
 			   sta->flags & WLAN_STA_ASSOC) {
 			/* station activity detected; reset timeout state */