# Re: \[PATCH net 1/2\] net: macb: exclude software FCS from TX byte statistics

- From: Jakub Kicinski \<kuba@kernel.org\>
- Date: 2026-08-27 18:56:04 
- List: netdev
- Page: https://ratatoskr.run/netdev/2026/08/17471402
- Thread: https://ratatoskr.run/netdev/2026/08/17453734/t.md

```text
On Mon, 24 Aug 2026 15:47:02 +0200 Nicolai Buchwitz wrote:
> + * @skb_len: skb->len as handed over by the stack, before padding and
> + *           software FCS, only set for the last buffer of the frame

counting pad bytes to ETH_ZLEN as sent is perfectly legit,
it's a driver preference. Some don't because HW pads and
the driver doesn't want to bother adding a conditional.
But it's best if the driver bytes match wire bytes IMO.

Either way, you only need u8 or even a flag for this,
not a full u32?
```