ipq807x: fix proxy_arp

sk_buff's cb should be cleared in the entry point for both incoming and outgoing packets at each layer.
At bridge, it is already handled in the outgoing path, but not in the incoming path. We have seen cases
where proxyarp_replied was 1 on sk_buffs coming from the WLAN driver and they were getting dropped in
forwarding path.

Fixes: WIFI-10552
Signed-off-by: Venkat Chimata <venkata@shasta.cloud>

feeds/ipq807x/ipq807x/patches/224-clear-skbuffs-cb-for-incoming-packets.patch

@@ -0,0 +1,30 @@
+From a0d398a7373b395a2cbdc865815560671d1e8a08 Mon Sep 17 00:00:00 2001
+From: Venkat Chimata <venkata@shasta.cloud>
+Date: Fri, 12 Aug 2022 15:42:40 +0530
+Subject: [PATCH] sk_buff's cb should be cleared in the entry point for both
+ incoming and outgoing packets at each layer. At bridge, it is already handled
+ in the outgoing path, but not in the incoming path. We have seen cases where
+ proxyarp_replied was 1 on sk_buffs coming from the WLAN driver and they were
+ getting dropped in forwarding path.
+
+Signed-off-by: Venkat Chimata <venkata@shasta.cloud>
+---
+ net/bridge/br_input.c | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
+index e6b745b7..09cd5b72 100644
+--- a/net/bridge/br_input.c
++++ b/net/bridge/br_input.c
+@@ -282,6 +282,8 @@ rx_handler_result_t br_handle_frame(struct sk_buff **pskb)
+ 	if (!skb)
+ 		return RX_HANDLER_CONSUMED;
+ 
++	memset(skb->cb, 0, sizeof(struct br_input_skb_cb));
++
+ 	p = br_port_get_rcu(skb->dev);
+ 
+ 	if (unlikely(is_link_local_ether_addr(dest))) {
+-- 
+2.34.1
+