From: Jan Hoffmann jan@3e8.eu
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@vger.kernel.org Signed-off-by: Jan Hoffmann jan@3e8.eu Acked-by: Hauke Mehrtens hauke@hauke-m.de Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- 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 @@ -853,7 +853,8 @@ 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);