From 6fd34731a0dc303deb67b4e0c4038afd2a2740d5 Mon Sep 17 00:00:00 2001 From: Nogah Frankel <nogahf@mellanox.com> Date: Fri, 17 Jun 2016 15:09:06 +0200 Subject: [PATCH] mlxsw: switchx2: Don't count internal TX header bytes to stats Stop the SW TX counter from counting the TX header bytes since they are not being sent out. Fixes: f776bc285e30 ("mlxsw: Fix use-after-free bug in mlxsw_sx_port_xmit") Signed-off-by: Nogah Frankel <nogahf@mellanox.com> Reviewed-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net> --- drivers/net/ethernet/mellanox/mlxsw/switchx2.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c index 3842eab9449a4..25f658b3849a6 100644 --- a/drivers/net/ethernet/mellanox/mlxsw/switchx2.c +++ b/drivers/net/ethernet/mellanox/mlxsw/switchx2.c @@ -316,7 +316,10 @@ static netdev_tx_t mlxsw_sx_port_xmit(struct sk_buff *skb, } } mlxsw_sx_txhdr_construct(skb, &tx_info); - len = skb->len; + /* TX header is consumed by HW on the way so we shouldn't count its + * bytes as being sent. + */ + len = skb->len - MLXSW_TXHDR_LEN; /* Due to a race we might fail here because of a full queue. In that * unlikely case we simply drop the packet. */ -- 2.39.5