diff --git a/code/application/source/sf_app/code/source/wifi/sf_wifi_svr.c b/code/application/source/sf_app/code/source/wifi/sf_wifi_svr.c
index caba7166b..c03e9ca90 100755
--- a/code/application/source/sf_app/code/source/wifi/sf_wifi_svr.c
+++ b/code/application/source/sf_app/code/source/wifi/sf_wifi_svr.c
@@ -3063,10 +3063,25 @@ BOOL sf_system_check_wifi_ko(void)
     fgets(result, sizeof(result), fp);
     pclose(fp);
     if (result[0] == '\0') {
-        MLOGI("rtk_btusb module is not loaded.\n");
+        MLOGI("8723du module is not loaded.\n");
         return FALSE;
     } else {
-        MLOGI("rtk_btusb module is loaded.\n");
+        MLOGI("8723du module is loaded.\n");
+        return TRUE;
+    }
+}
+BOOL sf_wifi_check_firmware_class_ko(void)
+{
+    char command[30] = "lsmod | grep firmware_class";
+    FILE *fp = popen(command, "r");
+    char result[256];
+    fgets(result, sizeof(result), fp);
+    pclose(fp);
+    if (result[0] == '\0') {
+        MLOGI("firmware_class module is not loaded.\n");
+        return FALSE;
+    } else {
+        MLOGI("firmware_class module is loaded.\n");
         return TRUE;
     }
 }
@@ -3074,12 +3089,29 @@ BOOL sf_system_check_wifi_ko(void)
 int sf_load_wifi_ko(void)
 {
     int ret = 0;
+    UINT8 i = 0;
     MLOGI("start.\n");
     if (sf_system_check_wifi_ko() == TRUE) 
     {
         return TRUE;
     }
-    ret = system("insmod /lib/custom/lib/modules/4.19.91/kernel/net/wireless/cfg80211.ko");
+    for (i = 0; i < 50; i++)
+    {
+        if (sf_wifi_check_firmware_class_ko() == TRUE) 
+        {
+            break;
+        }
+        else
+        {
+            if(49 == i)
+            {
+                MLOGE("wifi setup fall!!\n");
+                return FALSE;
+            }
+            usleep(500 * 1000);
+        }
+    }
+    ret = system("insmod /etc/lib/modules/4.19.91/kernel/net/wireless/cfg80211.ko");
     if(ret == 0)
     {
         printf("Wifi cfg80211 OK\r\n");
@@ -3088,7 +3120,7 @@ int sf_load_wifi_ko(void)
     {
         printf("Wifi cfg80211 ERR\r\n");
     }
-    ret = system("insmod /lib/custom/lib/modules/4.19.91/extra/net/rtl8723du/8723du.ko");
+    ret = system("insmod /etc/lib/modules/4.19.91/extra/net/rtl8723du/8723du.ko");
     if(ret == 0)
     {
         printf("Wifi rtl8723du OK\r\n");
diff --git a/configs/Linux/cfg_565_HUNTING_EVB_LINUX_4G_S550/make_post.sh b/configs/Linux/cfg_565_HUNTING_EVB_LINUX_4G_S550/make_post.sh
index 273347f4b..aee23e2b5 100755
--- a/configs/Linux/cfg_565_HUNTING_EVB_LINUX_4G_S550/make_post.sh
+++ b/configs/Linux/cfg_565_HUNTING_EVB_LINUX_4G_S550/make_post.sh
@@ -104,6 +104,8 @@ MV_KO_LIST=(\
 /lib/modules/$KERVER/kernel/drivers/net/usb/qmi_wwan.ko \
 /lib/modules/$KERVER/extra/fs/exfat/exfat.ko \
 /lib/modules/$KERVER/kernel/drivers/bluetooth/rtk_btusb.ko \
+/lib/modules/$KERVER/extra/net/rtl8723du/8723du.ko \
+/lib/modules/$KERVER/kernel/net/wireless/cfg80211.ko \
 )
 
 
@@ -129,30 +131,6 @@ do
 	fi
 done
 
-SF_MV_KO_LIST=(\
-/lib/modules/$KERVER/extra/net/rtl8723du/8723du.ko \
-/lib/modules/$KERVER/kernel/net/wireless/cfg80211.ko \
-)
-
-if [ -d ${ROOTFS_DIR}/rootfs/lib/custom ]; then
-	echo "remove old rootfs etc/lib/custom"
-	rm -r ${ROOTFS_DIR}/rootfs/etc/lib/custom
-fi
-
-
-for n in "${SF_MV_KO_LIST[@]}"
-do
-	if [ -f ${ROOTFS_DIR}/rootfs/${n} ]; then
-		path=$(dirname "${ROOTFS_DIR}/rootfs/lib/custom${n}")
-		if [ ! -d ${path} ]; then
-			mkdir -p ${path}
-		fi
-		echo "mv ${ROOTFS_DIR}/rootfs/${n} to ${path}/"
-		mv ${ROOTFS_DIR}/rootfs/${n} ${path}/
-		${STRIP} -g --strip-unneeded ${ROOTFS_DIR}/rootfs/lib/custom/${n}
-	fi
-done
-
 # static device node
 MAJOR=253
 rm -rf ${ROOTFS_DIR}/rootfs/dev/*