https://github.com/tomaspinho/rtl8821ce/pull/245

From 8d1fa1bdc38c31c4ae69d6dd48c0f8f70ed57f71 Mon Sep 17 00:00:00 2001
From: egnappahz <egnappah@gmail.com>
Date: Tue, 2 Nov 2021 18:46:42 +0100
Subject: [PATCH] Update rtw_br_ext.c

Fix for Linux 5.15
---
 core/rtw_br_ext.c | 72 ++---------------------------------------------
 1 file changed, 2 insertions(+), 70 deletions(-)

diff --git a/core/rtw_br_ext.c b/core/rtw_br_ext.c
index 9a0effd..2cb0e19 100644
--- a/core/rtw_br_ext.c
+++ b/core/rtw_br_ext.c
@@ -17,7 +17,6 @@
 #ifdef __KERNEL__
 	#include <linux/if_arp.h>
 	#include <net/ip.h>
-	#include <net/ipx.h>
 	#include <linux/atalk.h>
 	#include <linux/udp.h>
 	#include <linux/if_pppox.h>
@@ -949,76 +948,9 @@ int nat25_db_handle(_adapter *priv, struct sk_buff *skb, int method)
 			}
 		}
 
-		/*   IPX  */
-		if (ipx != NULL) {
-			switch (method) {
-			case NAT25_CHECK:
-				if (!memcmp(skb->data + ETH_ALEN, ipx->ipx_source.node, ETH_ALEN)) {
-					RTW_INFO("NAT25: Check IPX skb_copy\n");
-					return 0;
-				}
-				return -1;
-
-			case NAT25_INSERT: {
-				RTW_INFO("NAT25: Insert IPX, Dest=%08x,%02x%02x%02x%02x%02x%02x,%04x Source=%08x,%02x%02x%02x%02x%02x%02x,%04x\n",
-					 ipx->ipx_dest.net,
-					 ipx->ipx_dest.node[0],
-					 ipx->ipx_dest.node[1],
-					 ipx->ipx_dest.node[2],
-					 ipx->ipx_dest.node[3],
-					 ipx->ipx_dest.node[4],
-					 ipx->ipx_dest.node[5],
-					 ipx->ipx_dest.sock,
-					 ipx->ipx_source.net,
-					 ipx->ipx_source.node[0],
-					 ipx->ipx_source.node[1],
-					 ipx->ipx_source.node[2],
-					 ipx->ipx_source.node[3],
-					 ipx->ipx_source.node[4],
-					 ipx->ipx_source.node[5],
-					 ipx->ipx_source.sock);
-
-				if (!memcmp(skb->data + ETH_ALEN, ipx->ipx_source.node, ETH_ALEN)) {
-					RTW_INFO("NAT25: Use IPX Net, and Socket as network addr\n");
-
-					__nat25_generate_ipx_network_addr_with_socket(networkAddr, &ipx->ipx_source.net, &ipx->ipx_source.sock);
-
-					/* change IPX source node addr to wlan STA address */
-					memcpy(ipx->ipx_source.node, GET_MY_HWADDR(priv), ETH_ALEN);
-				} else
-					__nat25_generate_ipx_network_addr_with_node(networkAddr, &ipx->ipx_source.net, ipx->ipx_source.node);
-
-				__nat25_db_network_insert(priv, skb->data + ETH_ALEN, networkAddr);
-
-				__nat25_db_print(priv);
-			}
-			return 0;
-
-			case NAT25_LOOKUP: {
-				if (!memcmp(GET_MY_HWADDR(priv), ipx->ipx_dest.node, ETH_ALEN)) {
-					RTW_INFO("NAT25: Lookup IPX, Modify Destination IPX Node addr\n");
-
-					__nat25_generate_ipx_network_addr_with_socket(networkAddr, &ipx->ipx_dest.net, &ipx->ipx_dest.sock);
-
-					__nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-
-					/* replace IPX destination node addr with Lookup destination MAC addr */
-					memcpy(ipx->ipx_dest.node, skb->data, ETH_ALEN);
-				} else {
-					__nat25_generate_ipx_network_addr_with_node(networkAddr, &ipx->ipx_dest.net, ipx->ipx_dest.node);
-
-					__nat25_db_network_lookup_and_replace(priv, skb, networkAddr);
-				}
-			}
-			return 0;
-
-			default:
-				return -1;
-			}
-		}
-
+		/*   no more IPX since 5.15  */
 		/*   AARP  */
-		else if (ea != NULL) {
+		if (ea != NULL) {
 			/* Sanity check fields. */
 			if (ea->hw_len != ETH_ALEN || ea->pa_len != AARP_PA_ALEN) {
 				DEBUG_WARN("NAT25: Appletalk AARP Sanity check fail!\n");