linux-kernel - Re: [PATCH net] net: fec: correct rx_bytes statistic for the case SHIFT16 is set

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Message-ID: <20251107185937.0cbaf200@kernel.org>
Date: Fri, 7 Nov 2025 18:59:37 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Wei Fang <wei.fang@....com>
Cc: shenwei.wang@....com, xiaoning.wang@....com, andrew+netdev@...n.ch,
 davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
 eric@...int.com, imx@...ts.linux.dev, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] net: fec: correct rx_bytes statistic for the case
 SHIFT16 is set

On Thu,  6 Nov 2025 10:14:21 +0800 Wei Fang wrote:
>  		ndev->stats.rx_bytes += pkt_len;
> +		if (fep->quirks & FEC_QUIRK_HAS_RACC)
> +			ndev->stats.rx_bytes -= 2;

Orthogonal to this patch, but why not:

	ndev->stats.rx_bytes += pkt_len - sub_len;

? Is this driver intentionally counting FCS as bytes?