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authorblogic <blogic@3c298f89-4303-0410-b956-a3cf2f4a3e73>2016-05-02 18:50:52 +0000
committerJo-Philipp Wich <jo@mein.io>2016-05-10 10:43:12 +0200
commitdecd89c57ff3b0d17d87d198c2cd48e20131d2fc (patch)
treee0aac459394106d09ca672823beed3f6204f418d
parent75629fb2a86cae1cb3829216215c843d93d0c3b7 (diff)
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ramips: Fix multicast ICMPv6 for the rt3050 ethernet switch.
The FCT2 esw register should be set to 0x2500C to have "unknown IPv6 multicast" packets broadcasted to every port, instead of dropped. The previous value only let those packets go through ports 1 and 3. "Unknown IPv6 multicast" packets include packets needed by ICMPv6 echo requests addressed to well-known addresses, such as ff02::1 (MAC address is 33:33:00:00:00:01 in this case). Please note that by default ICMPv6 echo requests to ff02::1 are not replied to by the router because of ip6tables considering those packets to be invalid. But this is another bug/patch. ;) Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net> SVN-Revision: 49287
-rw-r--r--target/linux/ramips/patches-4.4/0515-net-mediatek-fix-multicast-icmpv6-for-the-rt3050-eth.patch26
1 files changed, 26 insertions, 0 deletions
diff --git a/target/linux/ramips/patches-4.4/0515-net-mediatek-fix-multicast-icmpv6-for-the-rt3050-eth.patch b/target/linux/ramips/patches-4.4/0515-net-mediatek-fix-multicast-icmpv6-for-the-rt3050-eth.patch
new file mode 100644
index 0000000..66b65d8
--- /dev/null
+++ b/target/linux/ramips/patches-4.4/0515-net-mediatek-fix-multicast-icmpv6-for-the-rt3050-eth.patch
@@ -0,0 +1,26 @@
+From: Vittorio Gambaletta <openwrt@vittgam.net>
+Date: Mon, 02 May 2016 04:55:48 +0200
+Subject: [PATCH] net: mediatek: Fix multicast ICMPv6 for the rt3050 ethernet switch.
+
+The FCT2 esw register should be set to 0x2500C to have "unknown IPv6
+multicast" packets broadcasted to every port, instead of dropped.
+The previous value only let those packets go through ports 1 and 3.
+
+"Unknown IPv6 multicast" packets include packets needed by ICMPv6 echo
+requests addressed to well-known addresses, such as ff02::1 (MAC address
+is 33:33:00:00:00:01 in this case).
+
+Signed-off-by: Vittorio Gambaletta <openwrt@vittgam.net>
+---
+
+--- a/drivers/net/ethernet/mediatek/esw_rt3050.c
++++ b/drivers/net/ethernet/mediatek/esw_rt3050.c
+@@ -450,7 +450,7 @@ static void esw_hw_init(struct rt305x_es
+ (RT305X_ESW_PORTS_NOCPU << RT305X_ESW_POC2_UNTAG_EN_S)),
+ RT305X_ESW_REG_POC2);
+
+- esw_w32(esw, 0x00d6500c, RT305X_ESW_REG_FCT2);
++ esw_w32(esw, 0x0002500c, RT305X_ESW_REG_FCT2);
+
+ /* 300s aging timer, max packet len 1536, broadcast storm prevention
+ * disabled, disable collision abort, mac xor48 hash, 10 packet back