drivers: wifi: nxp: fix wifi stats cmd hang when net_if down

After net interface is down and the driver deinit, should not interact
with driver and FW when call the 'wifi statistics' CMD.

Signed-off-by: Maochen Wang <[email protected]>

Author: MaochenWang1

drivers/wifi/nxp/nxp_wifi_drv.c

@@ -1278,6 +1278,10 @@ static int nxp_wifi_stats(const struct device *dev, struct net_stats_wifi *stats
 	stats->unicast.tx = if_handle->stats.unicast.tx;
 	stats->overrun_count = if_handle->stats.errors.rx + if_handle->stats.errors.tx;
 
+	if (!net_if_is_admin_up(net_if_lookup_by_dev(dev))) {
+		return 0;
+	}
+
 #ifdef CONFIG_NXP_WIFI_GET_LOG
 	wifi_stats = k_malloc(sizeof(wlan_pkt_stats_t));
 	if (!wifi_stats) {
@@ -1326,6 +1330,10 @@ int nxp_wifi_reset_stats(const struct device *dev)
 	/* clear local statistics */
 	memset(&if_handle->stats, 0, sizeof(if_handle->stats));
 
+	if (!net_if_is_admin_up(net_if_lookup_by_dev(dev))) {
+		return 0;
+	}
+
 #ifdef CONFIG_NXP_WIFI_GET_LOG
 	/* store firmware statistics */
 	wifi_stats = k_malloc(sizeof(wlan_pkt_stats_t));