This is a note to let you know that I've just added the patch titled
net: dsa: lantiq_gswip: fix maximum frame length
to the 5.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-dsa-lantiq_gswip-fix-maximum-frame-length.patch
and it can be found in the queue-5.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 552799f8b3b0074d2617f53a63a088f9514a66e3 Mon Sep 17 00:00:00 2001
From: Jan Hoffmann <jan@xxxxxx>
Date: Wed, 1 Sep 2021 20:49:33 +0200
Subject: net: dsa: lantiq_gswip: fix maximum frame length
From: Jan Hoffmann <jan@xxxxxx>
commit 552799f8b3b0074d2617f53a63a088f9514a66e3 upstream.
Currently, outgoing packets larger than 1496 bytes are dropped when
tagged VLAN is used on a switch port.
Add the frame check sequence length to the value of the register
GSWIP_MAC_FLEN to fix this. This matches the lantiq_ppa vendor driver,
which uses a value consisting of 1518 bytes for the MAC frame, plus the
lengths of special tag and VLAN tags.
Fixes: 14fceff4771e ("net: dsa: Add Lantiq / Intel DSA driver for vrx200")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Jan Hoffmann <jan@xxxxxx>
Acked-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/dsa/lantiq_gswip.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/net/dsa/lantiq_gswip.c
+++ b/drivers/net/dsa/lantiq_gswip.c
@@ -843,7 +843,8 @@ static int gswip_setup(struct dsa_switch
gswip_switch_mask(priv, 0, GSWIP_MAC_CTRL_2_MLEN,
GSWIP_MAC_CTRL_2p(cpu_port));
- gswip_switch_w(priv, VLAN_ETH_FRAME_LEN + 8, GSWIP_MAC_FLEN);
+ gswip_switch_w(priv, VLAN_ETH_FRAME_LEN + 8 + ETH_FCS_LEN,
+ GSWIP_MAC_FLEN);
gswip_switch_mask(priv, 0, GSWIP_BM_QUEUE_GCTRL_GL_MOD,
GSWIP_BM_QUEUE_GCTRL);
Patches currently in stable-queue which might be from jan@xxxxxx are
queue-5.14/net-dsa-lantiq_gswip-fix-maximum-frame-length.patch
