From: Kevin Jilissen <info@kevinjilissen.nl>
Date: Sat, 4 May 2024 14:12:20 +0000 (+0200)
Subject: realtek: Trap LLDP packets to the CPU
X-Git-Tag: v23.05.4~153
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5b7240c07056ccdde606cea8e832d76f0d4e8002;p=thirdparty%2Fopenwrt.git

realtek: Trap LLDP packets to the CPU

We should setup the registers for trapping LLDP packets to the CPU.
Currently, these packets are forwarded to all ports which is not desired
behaviour.

Signed-off-by: Kevin Jilissen <info@kevinjilissen.nl>
(cherry picked from commit 5a5c52085a5bd0b1b8bc629f3586c7a93dcb4460)
---

diff --git a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
index 063ce9b8c5d..6d8b1552459 100644
--- a/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
+++ b/target/linux/realtek/files-5.15/drivers/net/dsa/rtl83xx/dsa.c
@@ -155,6 +155,12 @@ static void rtl83xx_setup_bpdu_traps(struct rtl838x_switch_priv *priv)
 		priv->r->set_receive_management_action(i, BPDU, TRAP2CPU);
 }
 
+static void rtl83xx_setup_lldp_traps(struct rtl838x_switch_priv *priv)
+{
+	for (int i = 0; i < priv->cpu_port; i++)
+		priv->r->set_receive_management_action(i, LLDP, TRAP2CPU);
+}
+
 static void rtl83xx_port_set_salrn(struct rtl838x_switch_priv *priv,
 				   int port, bool enable)
 {
@@ -207,6 +213,7 @@ static int rtl83xx_setup(struct dsa_switch *ds)
 	rtl83xx_vlan_setup(priv);
 
 	rtl83xx_setup_bpdu_traps(priv);
+	rtl83xx_setup_lldp_traps(priv);
 
 	ds->configure_vlan_while_not_filtering = true;